Other Fuel System Problems of GMC Sierra 1500 - part 2

Lifters (the part that opens and closes engine valves) fail prematurely. There was a loud ticking noises, rough idling. Took to dealership and they advise that yes the lifters are failing and not drivable at this time.

See all problems of the 2019 GMC Sierra 1500 🔎.

The vehicle received the official n252494001 recall oil remedy on 06/27/2025 at 15,438 miles (but suffered catastrophic engine failure and loss of propulsion at 33,661 miles on 05/30/2026).

See all problems of the 2024 GMC Sierra 1500 🔎.

My truck engine has failed due to metal shavings in the oil related to the l87 engine recall, and the failure occurred after gm had replaced the truck’s oil as part of the recall remedy. The recall remedy did not prevent the failure of the engine.

I again have noticed intermittent pulsing at low to medium speeds. At roughly 1k-2k rpm the engine at or about 10-20 mph is pulsating or hesitating with an obvious pulse which you can see on the tachometer as well (bouncing. ) it seems like there is either a computer, fuel flow or electric issue. Also, at speeds up to the 40 mph range, this is happening as well. Yesterday while towing a small 7'x12' empty dual axle trailer I noticed it again, I occasionally use my trailer to haul small loads up to 4500lbs. This has happened before but this time I decided to notate this on your site, since reading about ongoing problems with the 2020 6. 2l GMC Sierra 1500. I was aware of the other following years, 2021-2024? issues and that is why I purchased this 2020 year model. My truck will be available for inspection when the request is sent to me. Safety was not an issue, I ran my truck most of the day. I have not yet notified my Chevrolet dealer, roger dean, cape coral, FL. My truck has not yet been inspected for this issue. There were not any lights or warnings on display at time of incidents. Thank you, [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 GMC Sierra 1500 🔎.

On November 20, 2025, my 2022 GMC Sierra 1500 at4 equipped with the 3. 0l duramax diesel engine began experiencing intermittent engine overheating conditions. Concerned about a potential safety issue, I contacted a GMC dealership and was advised that because no diagnostic trouble codes were present, there was nothing to diagnose or repair and that I should continue driving the vehicle. Over the following months, the overheating condition continued intermittently. On may 24, 2026, while driving on the highway, the vehicle suddenly overheated, displayed fault code p1098, and entered reduced power ("limp mode"). The vehicle lost normal performance and acceleration while traveling in traffic. This created a significant safety hazard because the vehicle was unable to maintain normal highway speeds, increasing the risk of a rear-end collision or other traffic accident. The loss of power occurred while driving and without sufficient warning, leaving the vehicle unable to safely perform as expected in highway traffic. After researching this issue, I found numerous reports from other GMC and Chevrolet owners describing similar overheating, coolant control valve, thermal management system, and p1098-related failures. Many owners report symptoms involving engine overheating, reduced engine power, and limp mode operation while driving. I am concerned that this may indicate a broader defect involving the vehicle's cooling system and thermal management components. The vehicle exhibited overheating symptoms for approximately six months before the final failure occurred. Additionally, I understand that certain gm vehicles have been subject to service actions involving coolant control valves and thermal management system components. Given the similarity of symptoms, I am concerned that the overheating condition reported in November 2025 may be related to the same type of failure mechanism, yet my vehicle has not been included in any recall or special coverage program.

See all problems of the 2022 GMC Sierra 1500 🔎.

My truck will not start when I press the push-button ignition. After waiting a few seconds and trying multiple times, it typically starts on the third attempt. Additionally, it will not restart after the auto stop feature activates at stop signs or traffic lights. This is very concerning, especially when pulling into oncoming traffic, as I’m worried the truck could shut off while I’m crossing. I have already had the battery, starter, and alternator checked, and all components tested fine. However, the issue is still occurring. There are also no warning lights or messages displayed on the dashboard.

See all problems of the 2021 GMC Sierra 1500 🔎.

Dashboard lit up with engine light and stated that there's no compulsion.

Coolant control valve.

After driving my vehicle for a short period of time I stopped to go shopping. When I returned to my vehicle I started it as usual and the check engine light illuminated. I began driving and within 0. 25 miles I received an info enter message that stated my vehicle would have reduced acceleration and to please drive safely. My engine fans became noticeably louder and ran the entire trip home (about 15 minutes). After pulling into my driveway I sat in the vehicle and listen to the fans continue to operate. Additionally, my onstar system, wifi, and navigation systems quit working. A p1098 code was returned when using a diagnostic code device. Disconnecting the battery would cause the check engine light to extinguish and for the truck to operate without reduced acceleration; however, onstar, navigation and wifi would not work. After shutting off the engine and then restarting the check engine light would once again illuminate and the reduced acceleration message reappeared.

See all problems of the 2023 GMC Sierra 1500 🔎.

I was on my way home from work and everything was driving fine and then I got 1/4 mile from my house and the motor started making a very loud grinding sound. I could barely accelerate. The issue happened out of nowhere. No issues prior to this happening. I was driving about 40 miles an hour when the issue started and I limped it to my driveway, luckily I was not very far away. I have a 3 month old baby and this was my reliable family vehicle. Who’s to say what could have happened if I was driving at a higher speed with my child in the car. When it happened it started shaking really bad. I checked everything that I could. It sounded like my motor was starving for oil. I decided to go ahead and change my oil to see if that could have been the issue. I had just changed the oil approximately 2000 miles before this. I changed the oil and filter. Went to start it up and still same very loud grinding sound, shut it back off and have not started it since cause I’m afraid to damage it further. I checked the oil that I drained out of it and looks like small metal flakes in the oil. No warning prior to this happening. Just out of no where it sounds and felt like my motor was going to blow.

Bought the vehicle brand new at the end of April. 2 weeks later and at 557 miles, the engine had a lifter failure and needed to be replaced. One day after picking it up after the engine replacement, a fuel injector went bad and needed to be replaced. About 2 days ago, the check engine light lit up, and the GMC app said it was a code for the transmission system (popped on after attempting to remote start the vehicle, although the light did shut off on its own the next day after a software update on the vehicle).

I bought the vehicle brand new in April 2026. On may 3rd, approximately 2 weeks after I bought it, I experienced a lifter failure that caused metal to get into the oil pan/engine and the engine needed to be replaced. About a month later after repairs were complete, I picked up my vehicle on a Friday night, and the very next morning, had issues again. Took it back to the dealer and a fuel injector went bad and needed to be replaced. I recently attempted to use the remote start feature and as soon as it fired up, the engine cut out. I went to start it again and the check engine light came on. My GMC app said the code was transmission related, although it cleared on its on the next morning after a software update.

Truck was sold to me and the dealership said the truck did not have the defect and the oil was changed to a thicker oil as a precaution. 4,000 miles later the engine failed, was diagnosed as catastrophic engine failure due to the known recall, and was replaced, new engine is now making the same rod knocking noise.

The dynamic fuel management (dfs) is causing damage to lifters, valves, camshafts, and connecting rods. I received a recall notice from GMC on the GMC app, stating "l88" engine loss of propulsion or related field action: special coverage n252494003. The connecting rod and/or crankshaft engine components have manufacturing defects that can lead to engine damage and engine failure. My 22' GMC 1500 has just over 30k miles, and issues are starting with the previously mentioned engine parts. A "pico" test was completed at approx 20k miles. Too early and not enough mileage to show the true damage caused by the "dfm" dynamic fuel management.

While driving, the vehicle suddenly began running rough, losing power, and displaying engine warning lights. Due to the severity of the issue, the vehicle was towed to a GMC dealership for diagnosis. The dealership diagnosed lifter failure and a cracked cylinder head. The dealership also documented coolant intrusion, oil/coolant contamination, and evidence of internal engine damage. Repairs were attempted, including replacement of the cylinder head and lifter. After the repairs were completed, the vehicle never left the dealership because it continued misfiring on the same cylinder. Gm later determined the engine had a failed piston ring and scored engine block requiring complete engine replacement. The vehicle has approximately 55,000 miles, has been properly maintained, and was purchased new. This catastrophic engine failure resulted in loss of power and major internal engine damage at relatively low mileage. I also opened a case directly with gm customer assistance regarding this failure. The case involved multiple escalations after the initial repair attempt failed and the vehicle ultimately required full engine replacement. Gm ultimately advised that only partial assistance toward the engine replacement would be provided, leaving the customer responsible for a significant portion of the repair cost. I am submitting this complaint because this vehicle appears consistent with the ongoing NHTSA investigation involving gm 6. 2l l87 engine failures and loss of motive power.

While driving into work, I noticed a knocking sound from the outside of the vehicle. Once parked, upon further inspection I narrowed down the area of the noise to the bottom rear of the engine/front of transmission. Fortunately, I was able to park in front of my office building and wasn’t stranded on the side of the road but under different circumstances it could've been the side of a busy highway or hours from home. I had the vehicle towed to the dealership I originally purchased from, the dealership was able to duplicate the issue with me present. Later that afternoon I was informed that the engine had failed and a replacement would be ordered. There was no prior indication of a problem or warning/cel’s. The engine failed after the dealership had completed the engine recall ( pico test and 0-40w oil change ) related to the vehicle. I am reporting this in hopes that it helps with the investigation. This has been very disappointing for me as I have supported the brand of vehicle for many years. Only to have many issues under 80,000 miles and to lose confidence in the vehicle I purchased and the company.

I was driving to work when my vehicle’s check engine light illuminated, accompanied by a warning message stating, “low oil pressure—turn vehicle off. ” I immediately followed this instruction and shut the vehicle off. When I attempted to restart it, the engine cranked repeatedly before finally starting, but the same warning message reappeared, prompting me to turn it off again. A few months prior, I had the vehicle inspected at the dealership, where I was informed that it passed the 6. 2l engine national recall inspection. On April 9, 2026, the vehicle was towed to the dealership for further evaluation. On April 10, I was contacted and informed that technicians could hear a metallic noise coming from the engine. However, they stated that the readings from the pico test were not high enough to meet the criteria for engine replacement. The dealership recommended replacing the camshaft position sensor but could not confirm whether this repair would resolve the issue. They also indicated that I would be responsible for all associated costs. Despite the presence of concerning symptoms, including abnormal engine noise and repeated warning messages, I was advised that general motors would not approve an engine replacement unless the engine either completely seizes or fails both required diagnostic tests. At this time, my vehicle has only failed one of the two tests. As a result, I have been left without a reliable and safe vehicle, which is significantly impacting my ability to commute to work. This situation places me at risk of financial hardship and potential job loss. I am seeking a resolution that ensures my vehicle is properly diagnosed and repaired so that it is safe to operate.

Ticking at cold start. 4/02/26 on way home from work. Truck loses acceleration while driving. Bug jumps then display says low power mode. Truck will start but will not move forward or in reverse. Rpms increase but no propulsion. Recall was performed 11/17/25 and passed inspection through romain GMC evansville, in. Called romain on 4/02/26 and was told someone would return my call 4/03/26. Still waiting. Plan to call kate faupal dealership in henderson,ky on 4/06/26.

Vehicle: 2020 GMC Sierra 1500 slt VIN: 3gtu9del5lg340438 engine: 6. 2l v8, rpo l87 mileage: approximately 129,854 miles my 2020 GMC Sierra 1500 equipped with the l87 6. 2l v8 experienced an engine failure and has been diagnosed as needing an engine replacement. I am reporting this because my vehicle is equipped with the same l87 6. 2l engine currently being investigated by NHTSA under engineering analysis ea25007 for engine failures occurring outside the scope of recall 25v-274. My model year is not currently included in recall 25v-274. However, ea25007 specifically addresses l87 engine failures occurring outside the existing recall population, including 2019–2024 GMC Sierra 1500 vehicles. Gm also issued preliminary information bulletin pip5900, “diagnostic tips for seized engine or engine noise,” applicable to 2019–2023 GMC sierra vehicles equipped with the 6. 2l l87 engine, which identifies possible crankshaft bearing failure. I am requesting that this engine failure be documented as part of NHTSA's ongoing investigation of l87 engine failures outside recall 25v-274.

I am reaching out to NHTSA due to a vehicle that I believe will get me and/or my family in a major accident and cause serious injury or death. The vehicle that I had purchased in 07/08/2025 had a clean history report and was bought at 54,587 miles. It started having issues 8,563 miles later (odometer reading 63,150 ) on a trip that was 400 miles round trip. I was driving the vehicle on a highway at 65 mph and I felt a knocking vibration in the pedal it was not long before I could even pull over when the engine throttle had completely lost power causing the vehicle to almost come to a complete stop immediately having to steer onto the shoulder. After failing with no check engine light or warning present during the use of the vehicle on the road. It was giving off high temp/engine overheating with the engine making a continuous knocking sound in the engine. It eventually seized to work completely not being able to shift into neutral to push, and had to get it towed to the dealership 204 miles away. Gm had advised the dealership to replace the whole engine which they did, and that second engine had given out 678 miles later (odometer reading 63,828. ) I am now on my third engine and I cannot trust or rely this vehicle for saftey or transporation. I have reached out to gm to file a claim and attempt to adress this issue to try and come to a resolution, however they denied my claim and have said that I am not "eligible" for a buyback program. I am considering getting legal attorney this is very frustrating to say the least gm is a terrible manufacturer for this issue.

On 18 March 2026 I was driving at night at highway speed with my family (wife, [xxx] son, [xxx] daughter, and [xxx] son) when, without any warning, my 2023 GMC sierra at4 with 20,700 miles abruptly and violently shuddered and reduced speed from approximately 65 mph to 30 mph uncontrollably. Shortly after the initial speed reduction the vehicle presented simultaneous alerts that it was in "reduced acceleration mode", the "emission system control" had failed, and the that the check engine light was on. Although the vehicle claimed to be in reduced acceleration mode I was unable to prevent it from continuously slowing to 0 mph. I attempted to use the accelerator to move from the left lane of traffic to the right shoulder without causing an accident. However, the vehicle violently shuddered and would not accelerate or maintain speed. I managed to maneuver around traffic and stop the vehicle on the right shoulder. Due to the unlit highway and my family's emotional state after the incident, I determined the safest course of action was to attempt to get the vehicle to a nearby parking lot. After turning the vehicle off and back on, I managed to slowly drive with my flashers on (despite the vehicle continuing to violently shudder) approximately 1 mile to a wal-mart parking lot. Once there I noticed I received an email from onstar diagnostics that my vehicle experienced a significant engine malfunction with an associated p129f code. I coordinated for the vehicle to be towed to bill cramer Chevrolet GMC inc in [xxx] the following day. My vehicle had no lights, messages, or symptoms of this issue prior to it occurring. The dealership replaced the fuel pump power control module under warranty, cleared the faults, test drove the vehicle, and returned to me on 31 March 2026. The dealer mentioned they service roughly two vehicles of similar make and/or models daily for the same issue. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While driving on the road the vehicle started sputtering and stalled! we pulled to the side of the road and tried to start the car but it rolled and would not start. We called a a mechanic who had it towed and found out that the fuel pump and the fuel control board had failed. Both have been replaced and the truck seems to be working again. Heard several other persons had this issue with their gcm sierra elevation so we wanted to report since there is currently no recall. Luckily the traffic was not going that fast or we could have had an accident and been seriously injured.

The failure involved the engine (6. 2l l87 v8), specifically suspected internal components such as the crankshaft and/or connecting rods, as identified in a current recall. The vehicle is currently located at dennis gm in corner brook, newfoundland and is available for inspection. On March 9, while driving the vehicle normally on a main highway, the engine suddenly lost all power without warning. The accelerator became completely unresponsive and the vehicle rolled to a stop in the middle of a main highway. The engine would not restart. Due to the electronic gear selector, the vehicle could not be shifted into neutral, leaving both the truck and trailer immobilized in a live traffic lane. This created a serious safety risk to myself and other motorists, especially as I was in an area without cellular service and could not immediately call for assistance. The problem has not yet been formally diagnosed, as the vehicle remains at the dealership awaiting inspection. However, the symptoms are consistent with known failures described in the recall affecting these engines. The vehicle had previously undergone recall inspection on September 1, 2025 and was cleared at that time. The vehicle has been inspected previously by an authorized gm dealer as part of the recall process, but no defect was identified. It has since been towed to dennis gm following the failure and is pending further inspection. No police or insurance inspections have been conducted. There were no warning lights, messages, or prior symptoms before the failure. The engine failure was sudden and without any indication of an issue beforehand.

While driving home from phoenix on hwy 95, 30 miles out of tonopah on the way to reno engine propulsion and the complete engine failure occurred while driving at 75 mph. No warning at all. No cell service, had to use onstar to be our savior. Thank god they sent a tow truck, although my wife and I with 2 dogs had to wait 4 hours for the tow truck, while semi’s rolled by us going 80 mph. Dealer performed diagnostics on my truck and has to replace the engine due to engine failure. I had the recall completed in September with the new approved oil and cap. I know this is an ongoing problem with gm’s 6. 2 engine. Complete engine failure while driving at 75 mph. No engine warning sign. Screen went blank. I will no longer trust this truck or have any confidence in the truck once I get it back. I sure hope gm pays for this. This has caused me endless anxiety.

While driving down the highway experienced a partial loss of engine power causing jerky/rough operation, harsh shifting, and unpredictable behavior. Was told by the dealer service manager that it was likely a misfire in one of the cylinders. After diagnostics and servicing that included changing spark plugs, wires, and a full engine service it was later confirmed to most likely be due to a stuck lifter and will require a complete engine replacement. I have subsequently learned that this is a common problem with this l87 engine and may be an early indicator of failing crank bearings associated with a recall for later model years of my same vehicle. Seems to me that recall ought to be expanded to include earlier models with l87 engines.

Engine developed a low knock type noise just above idle while beginning to move in the parking lot. It was also noted pulling away from an intersection at low rpm under light acceleration. Oil pressure was normal, 30 psi and approximately 50-60 at cruising speed. Low level knock began earlier in the day but no other symptoms. Oil level was checked and found to be at proper level. At mile 2 into my trip a chirping/ squeak type noise was heard under light throttle and light load at approximately 1500 rpm. The noise stopped when accelerator was released. Rough running sensation followed the noise under the load. Noise returned when the accelerator was pressed and then the engine stopped running while traveling 45-50 mph. Placed the shifter to neutral and attempted to restart, engine rolled slowly for a brief moment and then locked up entirely. Starter only clicks when attempted after that. Vehicle left me stranded with no heat on the shoulder of the highway in the dark in northern michigan on March 5, ambient temp was 28 degrees. Vehicle towed to closest dealership which is also where it was purchased for inspection on 3/6/2026. General motors customer care contacted and case opened. No assistance with repair at time of callback.

Getting off on highway and when I got to the light the truck stuttered and shut off. Will not turn back on. When I try to start it it stutters and will not turn on.

Driving along a main road at 40-45 mph and coasting toward a traffic light, the engine stalled out. Traffic light turned green and the vehicle would not accelerate. There were no warnings, check engine lights, or sounds. I could not pull to the shoulder due to traffic and had to pull into a left hand turn lane. The truck would not restart. Electrical systems seemed fine. Engine would turn over but not start on multiple attempts. One attempt finally got it to start but it immediately stalled. I was stuck in a dangerous situation at a busy intersection and no way to move the vehicle. It has been towed to the dealership.

On Saturday at approximately 5:30 p. M. , while driving on a two-lane city street with vehicles around me, my GMC sierra began malfunctioning. The gauges flickered, warning lights appeared, and a transmission warning activated. As I attempted to safely pull over, the vehicle began stuttering and then completely stalled in the middle of traffic. Cars swerved and honked to avoid hitting me. Fortunately, no collision occurred, but the situation was extremely dangerous and frightening. Aaa towed the vehicle to the GMC dealership. When I informed them of the incident, I received a text asking whether an over-the-air update had been performed prior to the stall. I confirmed the vehicle had received an update within the past three months. I was then told there is a bulletin stating that after an over-the-air update, the vehicle may suddenly lose communication with multiple modules and stall. The foreman indicated this was likely the cause and that they were consulting technical assistance. I asked when it is considered safe to drive a GMC vehicle following an update, as I was never warned that the vehicle could suddenly lose power and stall without notice. I was told they were investigating further. Yesterday, I was informed that engineering directed them to replace the ecm (engine control module) and the fuel pump control module, with the ecm expected to arrive next Wednesday. I have not been given a confirmed timeline for completion. This appears to be a serious and known issue within GMC, yet there has been no recall and no warning provided to consumers. I was unknowingly driving a vehicle susceptible to sudden and complete power loss. This failure placed my life, my family, and the safety of others at significant risk.

The vehicle is subject to safety recall n252494001 (NHTSA campaign 25v-274) due to manufacturing defects in the engine crankshaft and connecting rod bearings. • component/system failed: the 6. 2l v8 (l87) engine crankshaft and connecting rod assembly. The engine is available for inspection upon request. • safety risk: the defect can cause catastrophic engine damage and sudden loss of propulsion while driving, significantly increasing the risk of a crash. • dealer/manufacturer confirmation: the problem was confirmed via the issuance of safety recall n252494001. A dealership inspection was performed previously as part of the recall. • warning signs/symptoms: common symptoms include engine knocking, check engine lights, and hesitation before sudden failure. The issue with the remedy: federal law (49 u. S. C. § 30120) requires manufacturers to remedy safety defects "without charge". As a permanent safety remedy for this defect, gm has mandated a switch from 0w-20 to 0w-40 (dexosr) oil for the life of the engine to prevent bearing failure. However, the dealership and manufacturer are refusing to provide this mandated safety spec change without an ongoing $85 surcharge per oil change. While they performed the initial "inspection" oil change for free, they are now using the recall-mandated spec change to create a financial burden on the consumer. Because 0w-40 is now the mandatory factory requirement to prevent the safety defect, charging a premium for it constitutes a failure to provide the recall remedy "without charge. " general motors refuses to offset this cost, effectively penalizing the owner for a manufacturer safety defect. The dealership is also failing to honor my platinum wrap warranty and gm prepaid service contract to perform the continued oil changes without additional charges.

Engine lost all power while I was attempting to make a left turn at a very busy intersection. Dash kept saying “check battery”, jump pack did nothing. Engine wouldn’t start.

Began with a misfire on cylinder 5 code p0305. Replaced spark plugs, wires, and coil pack. Misfire still existed. Fuel injector on cylinder 5 was stuck open and had to be replaced. Misfire still existed. No spark from new coil pack on cylinder 5, replaced coil pack connector. Misfire still existed, but lifter tick became present. Removed cylinder head and found exhaust lifter on cylinder 5 was bad and needed replaced. Currently awaiting parts delivery (only available through gm dealer). Have been without vehicle for 7 weeks now. Was told this was most likely related to active fuel management.

"vehicle is experiencing symptoms consistent with the 6. 2l l87 engine bearing failure investigation (NHTSA probe January 2026). Despite two repair attempts, the dealer claims 'operating as designed. ' I have experienced persistent engine stumble,hesitation, erratic tachometer needle flutter and significant vibrations felt through the floorboard and seats during operation. These defects substantially impair the use ,value and safety of my vehicle. This is a serious safety concern as it creates a risk of catastrophic engine seizure at highway speeds. Manufacturer has been sent a formal 'last chance' letter under NJ lemon law. " reference # 1771884.

- vehicle started misfiring, ecm, valve timing code, throttle system code, data system, gateway, module,. Vehicle is available and currently at the GMC dealership for continued diagnostic. -this happened on the freeway and out of nowhere the vehicle started shaking, rough, losing power and acceleration, I had to cut someone off on the freeway just to get over to the right shoulder and turned off the vehicle called a tow truck and haven’t been able to use the vehicle since. Vehicle is unable to be driven due to safety issues of increased acceleration and loss of power, intense shaking. -the vehicle is at the dealership now, prior there was a diagnostic performed by a different dealer, and it has been confirmed. -the vehicle is at the GMC dealership now. -ecm check engine light came on prior to the vehicle misfiring and other codes coming up.

The def tank in my truck is defective and its the second time in the last 14 months it has broke. The part is now back ordered and according to the dealership this is a nationwide issue regarding these specific trucks. I have contacted around 10 dealers in my area and all tell me the same thing that they have multiple trucks waiting on the same issue. I have not had my truck for over 2 months and have no idea when I will be getting it back due to dealership having no idea when the part will be released due to the back order. This seems to a huge issue with these trucks and gm is doing nothing to help resolve it. I've reached out to gm directly and get no assistance and now have made 2 payments on my truck and the dealership refuses to give me a loaner vehicle. I am looking for some help or relief on what to do to go about my issue.