Other Fuel System Problems of Chevrolet Volt - part 1

2017 chevy Volt, lost propulsion and stalled on a highway in 3 separate instances. Gm case # xxx: the first instance, in late 2021, resulted in a becm replacement. The following instances, xxx and sxxx, had the exact same symptoms: loss of propulsion on highway, shift to park, full charge but 0 range, check engine light. Gm case # xxx: in March the vehicle was towed to haselwood Chevrolet in [xxx] and they told to check for becm issues. The dealership refused to include the customer description of the failure on the highway, or acknowledge there was a possible becm issue, since they said there was no becm code. The failure presented as a classic intermittent becm thermal failure. They failed to follow gm's diagnostic tree for an intermittent communication loss, as per gm technical service bulletin pip5812. Because of that diagnostics failure, I am now completely disabled, again, at [xxx],191 miles, 6 months later. This is a single, continuous warranty failure spanning from March through sept 2026. Gm case # xxx: due to previous misdiagnosis, I am awaiting gm’s pre-approval or referral for a rental car as covered by gm special coverage program xxx, before having the car towed to ruddell Chevrolet in [xxx]. I live a 2 hr round trip from [xxx] and am stranded without a loaner or rental. The tow truck is my way to the dealership to get a rental. If the becm was recalled, these last two instances could have been prevented and I would not have had to fight tooth and nail with dealerships and gm for coverage, towing, and rental reimbursement, yet again. Please issue a recall on the Volt 2017 becm and any becm replaced before the soldering issue on these parts was corrected to prevent future dangerous failures and high levels of customer inconvenience and frustration. My 4 x jpeg and png attachments under 10mb failed to upload on this site. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2017 Chevrolet Volt 🔎.

2018 chevy Volt lt. Diagnosed with a bad battery section on September 9, 2026. Warranty part number # 24060120 ordered by dealer. Status September 28, 2026 - part back-ordered / no eta. Dealer refuses to provide a loaner car while waiting for the part.

See all problems of the 2018 Chevrolet Volt 🔎.

While driving on a highway the car started to hesitate, a message appeared on the console "propulsion power is reduced" and the engine light turn on. After driving some miles, a new message appeared: "engine unavailable, service soon" and the car only ran on electric power, no motor engine. I had the same problem 3 year ago and the dealer identified the problem as a shorted egr valve. This time I knew this shorted egr valve burns the f3 fuse. I managed to get to a car part shop and bough several fuses (15 amp). After replacing the fuse 3 times I managed to get to the dealer. The repairs cost $3000+ (up from $1000+ 3 years ago). This problem is well documented on the gm service technical bulletin "21-na-116" dated February, 2023. Three years ago I was in the middle of nowhere in south texas and it took 6 hours to get a tow truck this time I was lucky enough to be close to to a town that the remain battery power was enough to get to the store where I bought the fuses. Gm should recall this part and do a proper fix.

I was driving on an interstate in seattle, and the car completely died. A check engine light went on. I had to roll into the shoulder and call for a tow to the dealership's service department. Here is what they found: ----60gcz engine repair diag/ customer reports the ses lamp is on with reduced propulsion message displayed. Check and advise. 1. Tested vehicle and verified reduced propulsion power message and ses light. Scanned vehicle for codes and found multiple p0489, p0030, p0031, p0132, p0135, p0137, p0443, p0458, p0597, p0598, p06da, p06db, and p103c. Traced back to no power on circuit 5293. Traced back to blown 15-amp fuse 3 of under hood fuse block. Found bulletin #24-na-080 stating this can be caused by a short in the egr valve. Tested circuit 5293 and found short at the egr valve. Advise egr valve and cooler replacement then retest. ---- we disconnected the egr valve, which means we are driving only on gas, not electric. We cannot charge it anymore. The cost to replace the valve and cooler is over $4k because Chevrolet does not make the vehicle anymore or the egr valve part apparently. This is a significant safety hazard if the car is going to simply die suddenly. It is a miracle I did not get hit.

The vehicle had a the becm fail at 64,000 miles. This is a known issue that gm still refuses to recall, and is refusing to warranty.

I was driving back from [xxx] on xxx, when I received a "propulsion power limited" message on my dash with a check engine light. I pulled off to a nearby gas station and tried to scan the code to figure out what was going on when I then received the message "engine unavailable" and the car shut off. I checked the fuse box and found that the f03 fuse had blown. I replaced the fuse and attempted to start the car again. It began normally, but then after driving 10 feet, I received the "engine unavailable" message again with a check engine light and the car no longer had power and I had to coast into a parking spot. I checked the fuse again and found it was blown. If I had not stopped in the gas station, I would have been stranded on the side of the highway, or worse yet, I would have stalled out on the highway and potentially got hit. I had my car towed to a dealership who eventually completed their inspection of the car on xxx and determined that the egr valve had failed (the servo motor burned out and blew the f03 fuse). This is a well known issue on the 2nd generation of Volts and it is likely faulty servo motors in the egr valves. The dealership even included in its financial assistance request to chevy on my behalf that the egr valve failure is a known issue. When asked if there was any preventative maintenance suggested to prevent the egr valve from failing, the service technician indicated that there wasn't anything that I did as the end user to cause the problem. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Battery energy control module malfunction module replaced but not covered under special coverage n232432680.

The battery energy control module (becm) failed. Before repair, the check-engine light appeared intermittently, the vehicle sometimes had difficulty starting, and the indicated electric range could suddenly drop from about 30 miles to zero despite a charged high-voltage battery. When this occurred, the gasoline engine started unexpectedly. The air conditioning also intermittently blew warm air until the vehicle was restarted. These symptoms created a safety concern because propulsion mode and indicated range could change without warning, and the vehicle could fail to start in traffic or another unsafe location. An authorized Chevrolet dealer confirmed the problem. The dealer retrieved dtcs u2624 and u2629, performed circuit testing, and diagnosed an internal short in the becm causing loss of communication with high-voltage battery modules. The dealer stated this failure caused the warning light, starting issue, sudden loss of indicated battery range, and air-conditioning symptoms. The becm was replaced and programmed after removal of the high-voltage battery assembly. The warning light first appeared about one month before repair, with the other symptoms becoming more apparent in early July 2026. The vehicle had approximately 80,918 miles when inspected. The failed component was retained by the dealership as a core and is not available to me for inspection. To my knowledge, the vehicle was not separately inspected by police, insurance, or gm engineering personnel. My vehicle was excluded from gm special coverage n232432680 even though it is a 2018 Chevrolet Volt with the same confirmed becm failure addressed by that program and NHTSA investigation pe23022. I paid $3,970. 56 for the repair. I am filing this complaint because this defect can cause no-start, loss of indicated battery range, warning lights, unexpected propulsion changes, and potentially reduced propulsion, while some affected 2016–2018 vehicles appear excluded from the special coverage.

I was investigating a thumping sound coming from the vehicle when going over bumps. I discovered that the left fuel tank strap had completely broke into two pieces and was no longer holding up the tank. The fuel tank straps are not readily viewed on the vehicle until you lower/remove the underbody aerodynamic material. It appears that the underbody aerodynamic material may have been contributory by retaining dirt and trapping moisture in contact with the tank straps. The failed tank strap parts are available for inspection. No other indication of the failed tank strap other than the minor noise and no other inspections have been performed on the failed component.

While driving down highway rapidly slowed to 15mph. "reduced propulsion" was displayed with significant battery and gas left. Caused cars to swerve and pile up behind me. The car was inspected by dealer and received a variety of u26xxx codes. Dealer states its a faulty becm. There was no warning lights on before the incident and have had no issues till then. We were lucky this was during the day. Nighttime would have been a terrible accident with oncoming traffic. Dealer is not wanting to cover becm repair from gm special coverage bulletin n232432680 that was investigated by your organization a couple of years ago.

The vehicle experienced a catastrophic charging system failure. When connected to the wall charger, the charge port becomes hot to the touch within seconds. The charger connector has now cracked from heat stress, and the wall charger itself previously melted due to electrical backfeed from the vehicle. The vehicle refuses to charge at all. This appears to be a thermal event and fire-risk safety defect involving the onboard charger, wiring harness, or battery management system. Insurance refused coverage due to the nature of the electrical failure. The vehicle is unsafe to charge or operate.

See all problems of the 2015 Chevrolet Volt 🔎.

The battery energy control module (becm) on my 2016 Chevrolet Volt has failed. The vehicle and the component are currently located at my home address and are available for inspection upon request. As of writing this now. This failure caused the vehicle to enter a "reduced power mode" and subsequently resulted in a no-start and no-charge condition. The sudden loss of propulsion power presents a severe safety and crash risk, as the vehicle can lose motive power and stall unexpectedly while in transit. Prior to the complete failure, the vehicle displayed a check engine light and a "reduced propulsion power" message on the dashboard. The local Chevrolet dealership has inspected the vehicle, pulled the associated diagnostic trouble codes, and officially confirmed that the becm has failed. General motors has already acknowledged this specific safety defect through special coverage bulletin n232432680, which extends becm warranty coverage to 15 years or 150,000 miles to prevent sudden loss of propulsion. However, gm corporate and the dealership are refusing to honor this bulletin. They are denying coverage due to an administrative database flaw because my vehicle's under-hood veci label designates it as an original California (carb/pzev) vehicle, gm's system excluded my VIN from the special coverage bulletin automation. Furthermore, because the vehicle is currently registered in a non-carb state (texas), the original carb warranty is considered void. Gm is using this internal database loophole to deny repairing a documented safety defect.

See all problems of the 2016 Chevrolet Volt 🔎.

Received "reduced propulsion" message, with no engine detected. Car slowed to a near stop while driving on the interstate highway. Very dangerous to have that suddenly happen. Message popped up randomly with no prior warning.

While driving at highway speeds over 100 miles away from home with my child in the vehicle, the car experienced a sudden, catastrophic loss of propulsion power and entered 'propulsion power reduced' mode, dropping vehicle speed immediately and creating an extreme hazard with high-speed highway traffic. A full computer scan revealed active diagnostic codes u2603 through u2624, confirming an internal hardware communication failure of the battery energy control module (becm). This matches gm technical service bulletin 18-na-261. The vehicle has over 150,000 miles, but I have only owned the car since January. This is a known, systemic manufacturing defect (cracked internal circuit board solder joints) that creates a critical safety liability regardless of vehicle mileage. Gm has refused to remedy the safety defect due to the mileage limit.

Message on dash "service high Voltage charging system" . Code cleared by inexperienced mechanic. Stalled on the side of the road with "engine not available" , "low propulsion" . My local chevy dealership confirmed a high Volt battery leak its now at risk for catching on fire.

See all problems of the 2012 Chevrolet Volt 🔎.

I purchased the above-listed 2016 Chevrolet Volt through carvana, relying on the contractual promise that the becm was covered under special coverage n232432680 for up to 15yrs or 150k miles. The vehicle has suffered persistent, severe mechanical and electrical issues resulting in a prolonged loss of use: 1. Initial breakdown and delivery: the vehicle originally had a reduced propulsion power alert on Monday [xxx] around 8pm and nearly caused me to be rear ended on a major road due to accelration issues. It then officially broke down on Tuesday, [xxx]. It was then delivered to vic koenig Chevrolet (1040 e main st, carbondale, IL 62901) via tow by freedom towing the following Friday, may 29, 2026. 2. Delayed work start & shop stay: vic koenig Chevrolet was able to officially begin diagnostic and repair work on Wednesday, June 3, 2026. The facility held the vehicle for several weeks to address the failures. 3. Brief release and immediate re-breakdown: I picked up the vehicle upon its supposed completion on Tuesday, June 16, 2026. Then less than 24 hours later, on Wednesday, [xxx], the vehicle suffered a recurring breakdown and had to be returned to the dealership immediately. 4. Wrongful coverage denials: on Thursday June 19, 2026, silver rock claims representatives issued explicit coverage denials to me via text message. That same day, service representatives from vic koenig Chevrolet phoned silver rock multiple times to provide diagnostic evidence, but silverrock repeatedly issued oral denials over the phone. They stated the pcm and becm were not included in the contract, screenshots of the vontract state the opposite. Silverrock sent this refusal via email to me on June 19. I also contacted gm by phone on Wednesday 5/27/26 and so did the dealership and they refused to cover my vehicle under the special warranty for the known issue. I tried to request a cost reduction and they denied it again on 6/22/26. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2016 chevy Volt started experiencing the "propulsion power is reduced" issues associated with a faulty bcem unit. I brought my vehicle in for service at a chevy dealer and they confirmed that the bcem needed to be replaced. This is a known issue resulting in special coverage under n232432680. Chevy is not honoring the special coverage for my vehicle despite my vehicle being less that 15 years old and having fewer than 150,000 miles. According to the service manager after talking to someone higher up the food chain at chevy, "they're no longer covering this service. ".

I was driving my 2018 chevy Volt at about 30 mph on ev mode. The battery was at 50%, the car was performing normally. Then the battery jumped to 100%, the check engine light came on, and the vehicle lost power. I was in rush hour traffic and unable to get the vehicle to go faster than 5-10 mph. I switched to "normal" mode to engage the gasoline engine, hoping this would help but it did not. The gas engine rpm fluctuated wildly and did not restore the ability to accelerate the vehicle. I was still unable to go faster than 5-10 mph. I was a few blocks from home and managed to get home safely. The engine code was p1e00. I put the vehicle on the charger and it seemed fine the next day. This exact situation I ran into - reduced engine power - is addressed in special coverage n232432680, which includes this vehicles VIN. I took the car to the gm dealer today and they are telling me that the car is fine, they can find no problems. I mentioned that this issue is covered under special coverage n232432680, and was told that unless they can reproduce the issue in the shop, that they cannot apply special coverage n232432680.

Fully charged. Goes from electric to generator/gas propulsion and abruptly slowes about 1/2 speed. Very dangerous.

See all problems of the 2013 Chevrolet Volt 🔎.

The car suddenly lost power and produced error messages on the screen. I had to quickly change lanes to get out of traffic on the highway. My dealer diagnosed the issue as a becm malfunction and quoted a repair cost of approximately $3500. However, due to my car originally being registered in California, this failure is not covered under gm special coverage bulletin n232432680 (issued March 2024), which provides an extended warranty for becm issues on affected 2016-2018 Volts up to 15 years or 150,000 miles. My VIN does not qualify for this coverage despite the vehicle being within the model years affected by known becm soldering/connection failures. This appears to be part of a broader pattern of becm defects in 2016-2019 Volts that can lead to sudden loss of propulsion, as previously investigated by NHTSA. Gm should extend coverage or issue a recall for all affected vehicles, as this defect compromises vehicle safety and leaves owners with expensive out-of-pocket repairs for a known issue.

In March 2026, our 2017 Chevrolet Volt (89,300 miles) would not charge nor start, and had to be towed to an authorized Chevrolet dealership in portland, oregon. The dealership diagnosed an internal fault in the battery energy control module (becm) producing u26xx diagnostic trouble codes, per gm bulletin #18-na-261, and replaced the becm under gm special coverage n232432680 — gm's field remedy for a known becm defect affecting 2016–2019 Volts that causes reduced power, no-start, or no-charge conditions (the subject of NHTSA investigation pe23022). The remedy failed immediately. On the day the vehicle was returned to us (March 26, 2026), the check engine light illuminated while driving home on public roads, and the vehicle failed to charge that same night — the identical condition it had before. It was towed back to the dealership. The dealership's second work order confirms in writing that the vehicle "will not start after previous repairs and is having the same issues," and attributes the failure to the high-voltage battery contactor. The dealership informed us the part is no longer produced and cannot be obtained, advising that the vehicle be scrapped. Safety concerns: (1) after the repair, the dealership returned the vehicle to us as fixed, and we drove it approximately 26 miles home on public highways in traffic, unaware the defect was still present — the check engine light illuminated during that drive. This defect is the subject of NHTSA investigation pe23022 into sudden loss of propulsion, we unknowingly operated a defective vehicle in conditions where that failure could have occurred at highway speed; (2) gm's official field remedy for this known defect (special coverage n232432680) failed within hours of being performed; and (3) the parts required to complete the remedy are reportedly discontinued, leaving a known safety defect permanently unrepairable. Supporting documents uploaded: dealer repair orders, and the gm warranty history of the n232432680 repair.

Failure of battery energy control module (becm), within the high Voltage battery. Vehicle is unable to charge and sets “reduced power” message. Gm released special coverage bulletin for this issue (n232432680), but this vehicle is not listed due to which state it was registered. Continued failure of the becm will lead to inoperability of the vehicle.

Coolant was found inside the lithium-ion battery module when the dealership opened it to repair a different issue. They condemned the battery on the spot. There was no damage to the battery module. All pms were performed at Chevrolet dealerships throughout the life of the car. All recalls were fixed. Including the becm replacement the car is known have problems with. Car had 127,000 miles on it. One of the service reps even admited that he's seen it on multiple cars and that it is a manufacturing problem. Dealership said the repair is $29,000. The car was $35000 new 10 years ago. Thank god there was no fire, I drove my family around in that car for years. The dealership won't even let me see the diagnosis report online anymore. . .

Three separate high-voltage battery section failures within one year, each causing complete loss of propulsion. Two occurred at freeway speeds on [xxx]. Failure 1 ([xxx]): vehicle lost propulsion. Dealer diagnosed dtc p0afa (low Voltage), failed cell in battery section 3. Section 3 replaced under gm special coverage n232432680 (becm, 15yr/150k). Vehicle out of service approximately six months awaiting gm authorization and parts. Failure 2 ([xxx]): vehicle lost propulsion on [xxx] at night at freeway speeds. Required towing. Dealer diagnosed dtc p0afa, cell 85 at 1. 85v in battery section 1 (different section). Section 1 replaced under same special coverage. Vehicle returned Jan 28, 2026. Failure 3 ([xxx], ~300 miles after failure 2 repair): vehicle again lost propulsion on the freeway with check engine light, then progressed to no-start condition. Towed to dealer. Diagnosed Feb 20, 2026: dtc p0afa, cell 57 at 1. 5v in battery section 2 (gm minimum spec 2. 5v). Third distinct section failure. Vehicle remains at dealer awaiting gm repair authorization as of filing date. Safety concern: loss of propulsion at freeway speeds is an immediate safety hazard. During the Nov 2025 event, the vehicle lost power on [xxx] at night in active traffic. The progressive failure pattern (three different sections failing sequentially in the same pack, identical dtc) suggests a systemic defect rather than isolated component failures. Prior section replacements have not resolved the underlying problem. Vehicle has been usable approximately 20 total days in the past 12 months. All repairs performed or pending under gm special coverage n232432680. Gm case [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I received the "propulsion power is reduced" alert engine light while driving in "normal" mode on the freeway at around 60mph with 8-9 miles of battery capacity, it showed 0 miles of battery forcing the gas engine on and the vehicle hesitated upon applying the accelerator for the remainder of the drive. My safety and that was others was at risk because the acceleration dropped quickly and I was on a busy freeway at the time when the alert happened causing further hesitation. Upon stopping I could not get the vehicle to take a charge nor would it start up until a mechanic arrived and was able to confirm the problem.

It was the xxx recall for the dtc p0442/check engine light code. The dealership said that the recall had been satisfied in 6/2020 by putting a buffer in to separate the 2 lines but not replacing the part. Now the exact same code dtc p0442/check engine light in the exact spot that occurred for the original recall. The dealership originally quoted $5,093, then after me complaining that it is the same recalled problem they dropped the cots to $2384. I believe that is an agreement that the manufacturer should cover this. Of course I will have to pay to get my car but I would like the manufacturer to reimburse me for it seeing it was a manufacturer default. I spoke to the manufacturer they flat out refused to cover it. I obviously disagree. Would like you to pressure them to change their decision. Thank you, [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

There is a ongoing problem with the becm on 2016-2018 Volts. Mine is one of them. Contacted Chevrolet and they say my VIN isn’t under the extended coverage. I believe it should be and can’t stand they won’t cover my car under warranty. Is there anything you can do?.

This vehicle has had multiple incidents of surging of the propulsion system both on battery power and when powered by the internal combustion engine, causing loss of propulsion and sudden acceleration almost causing collisions multiple times. We have paid for over $4,000 in repairs that are not covered under the propulsion system warranty, and these repairs have not remedied the issue.

The vehicle losses power on high speed, check engine comes on, low propulsion massage displays. Vehicle does not charge. Issues similar to the investigation dcs6812.

Experiencing intermittent propulsion system failure with multiple simultaneous warning messages on 2017 Chevrolet Volt at approximately 59,000 miles. Warnings displayed: - "propulsion power reduced" message - "check tire pressure monitoring system" (false alert - all tires properly inflated and recently replaced) - multiple dashboard warning lights including exclamation point indicators - vehicle exhibits abnormal driving characteristics pattern: issue occurs intermittently while driving. Vehicle can be restarted and may operate normally afterward, then fault returns unpredictably. Safety concern: this matches documented battery energy control module (becm) failure pattern referenced in gm investigation n232432680/pe23022 and customer satisfaction program 17228 recall n172096420 for reduced propulsion power in 2016-2018 Volts. Review of owner complaints shows other 2017 Volt owners experiencing sudden complete loss of propulsion while driving at highway speeds, creating dangerous situations requiring evasive action by other drivers. Risk: loss of propulsion power while driving with dependent passengers creates serious crash risk. Vehicle is used for daily transportation of minor children. Request: vehicle exhibits known defect pattern but manufacturer has not extended recall coverage. Request investigation into whether recall should be expanded to cover additional affected vehicles.

My car started having issues with the hybrid system, with fault alerts related to the drive motor control module, hybrid powertrain control module, and battery energy control module in the transmission, and the vehicle is available for inspection if needed. The engine light had been on for about a week, and I was waiting for availability at work to take it to a mechanic. While driving around 70 mph on the highway, a “propulsion power reduced” message suddenly came on and the car started limiting its speed. As I kept driving, the power continued to drop, making it unsafe to stay at highway speeds and putting both me and other drivers at risk since the car couldn’t keep up with traffic and could slow down unexpectedly. I took it to an independent mechanic who confirmed the issue and warned me it was dangerous to drive because the speed would keep decreasing as power dropped. So far, only an independent mechanic has inspected it. After doing some research, I found this is a very common problem with 2016–2018 chevy Volts, with many people reporting similar situations where their cars lost power or started jerking at high speeds and they had to pull over.

Battery energy control module malfunction. It is a known issue with this system failing on the chevy Volt. There is a service bulletin on this problem. 18-na-261 is the service bulletin. The car will not start and when it does start it has loss of power while driving. Chevy is only fixing certain VIN numbers even thou it pulls up the same codes in their bulletin. Chevy only gave extended warranties to certain VIN numbers also. Extra warranty bulletin n232432680. This is a major component for the high Voltage battery which drives the vehicle. The dealership wants $5000. 00 to repair this.

The becm (battery energy control module) failed. The vehicle illuminated the mil and the driver display to show a "reduced power". When restarted, the display showed "shift to park", which I did several times. After a couple of restarts it displayed the "reduced power" message, but would not go into drive. The mil was illuminated the entire time. Through numerous key cycles I got the VIN operable and took it to the dealer for repair. The becm part is at the dealer or on its way back to gm as a core return. While this occurred while I was leaving my garage, it could have occurred in traffic, which would put me or others at risk. The problem was investigated by my local dealer (currie Chevrolet in forest park, IL) and it was determined to be both a bad battery energy control module (becm) and a bad shifter assembly. The shifter had been replaced (or repaired?) for an earlier shift to park failure per TSB 23-na-119. The dealer kept the becm as a core. I have pictures of the core. The dealer or gm should have that core. The above described warning lamps and messages and systems first appeared at the time of the event that lead me to take it other dealer ASAP. Note the condition and model year is described in gm special coverage letter "n232432680 battery energy control module malfunction". Nhtsa investigation pe23022 lead to this coverage letter. Per gm, while my vehicle experienced the conditions and is in the model year coverage of the letter, its VIN is not covered. I think NHTSA should re-open the investigation and consider a recall. There could be other vins susceptible this failure condition. There could be operators of those vins who cannot afford the expense (~$3000 or more) or downtime of the repair, and will keep operating the vehicle, putting people at risk again. If a recall is not supportable, I'd request that the VIN list be expanded to cover all possible defective becms.

Failure summary & safety risk: while operating in live traffic, the vehicle experienced a sudden loss of motive power and entered a "propulsion power reduced" failsafe mode, creating a severe rear-end collision hazard. The vehicle is currently grounded and remains available for inspection upon request. Warning symptoms & diagnostic codes: the instrument cluster illuminated the malfunction indicator lamp (check engine), the abs warning indicator, and displayed a persistent "propulsion power is reduced" message. A diagnostic trouble scan confirmed active high-voltage communication failures and powertrain faults: u2603 (lost communication with hybrid/ev battery interface control module), p25a2 (brake system control module requested mil), and abs code c0500-00. Prior history & failure to cure: this identical high-voltage battery energy control module (becm) failure previously occurred in December 2025 at 97,808 miles and was presented to an authorized Chevrolet dealership for repair. The facility claimed the vehicle was repaired, but the exact same catastrophic high-voltage failure recurred in under 4,000 miles (at 101,635 miles). Manufacturer policy & obstruction of repair: general motors recognized this hazardous defect under special coverage n232432680 (covering becm replacement for 15 years/150,000 miles at $0. 00 cost). This policy links to gm master bulletin 07-00-89-037s mandating direct-bill courtesy transportation for grounded safety defects. Despite this, when presented for warranty repair, the authorized Chevrolet dealership explicitly refused intake and refused to honor the transportation mandate, stating on the record: "yes, I do decline". Gm corporate (case 98734634) admitted coverage applied but failed to compel franchise compliance, leaving a dangerous, immobilized high-voltage hybrid vehicle stranded without access to safety-mandated repair bays.

I was driving in stop and go traffic on a relatively busy road when I was cut off. I braked hard to avoid a collision. Immediately afterwards, the car would not respond to the accelerator and would not go forward. I was in the middle of the road and the car would not respond. It could have caused an accident. I put the car into park and then back into drive and it seemed to work again. But I am now worried about the car.