Electrical System Problems of Chevrolet Silverado 2500 - part 1

I was driving the truck on my way to work in [xxx] , last March 12, 2026, at around 6:50 am. It was raining when I entered the exit ramp to work going west; the truck died, and the steering wheel locked. I tried to start it, but it wouldn't. The dashboard displayed: 'trailer park brake failed,' 'power steering pump needs service,' and 'axle repair error. ' I was on the exit ramp for a highway that runs north and south, and I could have been t-boned; it was still dark. The truck was towed to curry Chevrolet in scarsdale. They said it was the ecm and ordered the part. They installed the new ecm module last Tuesday, March 17. The service manager called me and said they tested the truck, but it is still showing active codes. A gm advisor called me saying the truck should be ready for pickup this Friday. However, this afternoon, I got a call from the service manager saying there is another issue—the engine wiring harness—and they will order the part; now it will not be ready until next week. Gm owes me my life. I do not want to drive the vehicle. The service department people at curry Chevrolet are very professional, but did I pay and spend a lot of money for a garbage truck? information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2025 Chevrolet Silverado 2500 🔎.

This vehicle does not recognize that the gear is on park. Due to the issue, it has left me stranded twice. The first time it was at a very remote area up in the mountains. I was stuck for hours due to battery dying. The second time being a very dangerous situation because it was a very dangerous area late at night.

See all problems of the 2020 Chevrolet Silverado 2500 🔎.

I was driving down the road at approximately 55 mph when all of a sudden, my truck decelerated and a warning signal displayed on my dash indicating my speed was being forcibly reduced to approximately 30 mph. Fortunately, I was on a rural road versus the interstate. I pulled over and had an obd2 reader. The reader indicated I had a p-2138 error code from a "voltage correlation error between the two accelerator pedal position (app) sensors". I was able to limp along with emergency flashers to return home. After driving approximately 10 miles, the "issue" resolved itself. I have since replaced the gas petal assembly after learning this is a common failure on many years of the chevy silverado series.

See all problems of the 2019 Chevrolet Silverado 2500 🔎.

My key refuses to come out of the ignition caused by a parking sensor is what chevy told me. I feel it is a safety hazard because I have to leave my truck idling and take the risk of the truck not registering it’s in park and moving on its.

See all problems of the 2023 Chevrolet Silverado 2500 🔎.

The internal components of the tailgate are damaged by water and need to be replaced. They cause the tailgate to open and close randomly. This could cause items to fall from the truck bed on to the road.

See all problems of the 2022 Chevrolet Silverado 2500 🔎.

When putting vehicle in park, I get a message on dash that says "shift to park" when the vehicle is already in park. The vehicle electrical components does not turn off. Sometimes if I wiggle/hit or stick my hand under the steering wheel adjustment lever I can get it to turn off. Becoming more troublesome. Through research I see it is a common issue among gm/chevy vehicles.

Rear defroster seemed to short circuit and over heated causing my back window to break. There was no warning, no light that alerted me to this going on. I had it inspected by a local chevy dealership and they have indeed confirmed that it short circuited and caused the damage to my rear window. They also removed the fuse to prevent anything further from happening and told me it could have completely caught on fire.

See all problems of the 2018 Chevrolet Silverado 2500 🔎.

On approximately January 24, 2026 my 2020 Chevrolet Silverado 2500hd equipped with the 6. 6 duramax diesel displayed an error code (p20b9). This error code was found to be related to the diesel exhaust fluid system specifically relating to "reductant heater a control circuit/open. " on January 27, 2026, the vehicle was diagnosed at Chevrolet dealership and the following was reported "diesel emissions fluid tank remove and replace - p20b9 set for reductant heater circuit. . . Commanded on and zero amps. . Circuitfailure. . . Disconnect pump module and burned/overheated terminals. . Pump module and harness part of tank assembly. . . Labor time added to perform malfunction/tamper test to clear emissions message. . . . " I found the "burned/overheated terminals" comment to be alarming. I looked into this matter further and found a gm service bulletin (21-na-006) from October 2022. This bulletin identified this issue which contained an image showing burned/overheated terminals. The identified cause within the bulletin states "this condition may be caused by a poor connection at the emission reduction fluid tank electrical connector. " I believe this should upgraded to a safety recall due the the potential of this terminal connection catching fire which could be detrimental for the operator, passengers, property, and the public.

I was leaving my farm property after loading my truck and tailgate and drove home 20 miles. At some point in the drive my tailgate dropped and fell onto the trailer tongue. This caused damage to my tailgate. I have called the dealer and they informed me there was a recall on the tailgate latch but they completed the work on the recall defect. I am questioning this and want to understand what to do now. I don't trust the tailgate and the truck has no warning system for when the tailgate drops like a door open signal.

See all problems of the 2024 Chevrolet Silverado 2500 🔎.

My truck went into limp mode with pulling a trailer on the highway due to a wide known injector pigtail failing. The truck would not accelerate, started shaking and lost speed suddenly. After resetting the dtc on my computer, each time the truck would hit a rough spot on the highway and vibrate, the truck would go back into limp mode. After getting the truck repaired at $566. 67 cost, the dealer say they would not help with the cost. Said the NHTSA would have to force them to fix this now issue. This was not a cheap truck and gm should not have there customers at risk in traffic with a know limp mode issue.

The check engine light goes on continously and it goes to limp mode. The truck cannot be driven daily and most of the time is in the dealer fixing the updates or computer. It is not an equipment problem but a computer problem.

Transmission lags and slips while over reving the engine. A local gm dealer has confirmed transmission issues and slippage.

The contact owns a 2021 Chevrolet silverado 2500. The contact stated that the connector for the heater system was causing the vehicle to overheat, subsequently enabling the vehicle to go faster than 50 mph. If the vehicle reaches 75 miles, it would immediately decrease in speed to 5 mph. The vehicle was taken to a certified mechanic who diagnosed a p20c1 code, indicating reductant heater failure had occurred. The vehicle was not repaired. The contact called the dealer, who recommended calling the NHTSA hotline to file a safety complaint. The manufacturer was informed of the failure they also referred the contact to the NHTSA hotline to file a safety complaint. The failure mileage was approximately 68,000.

See all problems of the 2021 Chevrolet Silverado 2500 🔎.

Had new western wideout snowplow (recommended by western) installed by western dealership on a 2016 Chevrolet Silverado 2500hd with the factory snow plow prep package (rpo vyu). Vehicles instrument cluster, hvac, radio and other electrical systems cut out while operating snowplow. Gm is well aware of this issue per gm service bulleting no. : pit5387c (Feb 2016) through pit5387p (10/17/2024), as well as gm upfitter integration ui bulletin #124k (11/7/2019). All list this specific vehicle. This issue effects snowplows by all manufactures and is not confined to western. Per the above bulletins published by gm, gm is to supply and install a wiring harness under a unique one time warranty procedure that does not expire with the vehicles base warranty. Gm dealerships as well as gm's consumer assistance hotline state that gm part number 84043394 (fitting 2014-2019 vehicles) referenced to in pit5387c and other bulletins has been discontinued. Up bulletin 124k refers to and instructs to install gm part number 84288774 vyu snow plow jumper harness per the latest version of gm service bulletin pit5387. With a note stating "this jumper harness and installation will be provided (one time) without charge". Gm dealerships and gm customer assistance (parts) state that pn 84288774 does not appear in their parts system as a valid gm part. The official gm parts store part. Gmparts. Com lists this part but shows that it does not fit this vehicle. Therefore neither gm nor western is able to provide any actionable solution to this known and documented issue. Gm manufactured, sold, promoted, advertised and continues to state that snowplows can be installed on these vehicles with (or without) gm's factory snow plow prep option. Additionally gm continues to issue and publish bulletins instructing gm dealerships how to fix this issue despite being fully aware of this impossibility. Gm has also made it impossible for gm to honor gm's own warranty that is still in effect for a known safty issue.

See all problems of the 2016 Chevrolet Silverado 2500 🔎.

The vehicle was in a collision that occurred to the front of the vehicle causing the seat belts to lock up a burst of compressed air to come from the dash, the hazards to engage and the dome lights to engage, the vehicle then was taken into get repaired at a certified dealership, after dealing with the dealership and general motors we find out the sensor did engage for the airbags to deploy but the airbags failed to deploy properly or break through the dash, the dealership and manufacturer are now not wanting to find out why this is doing this and just put a new airbag baffle in and call it a day.

We believe that it is the park sensor in the column . When you place the truck into park, the screen displays the words shift to park period and the dinger. Inside the truck continues to ding for a long time, even with opening and closing the door . . . The truck is actually in park, so it does not move. But the display says it's not. And apparently it is not registering because it keeps dinging.

There are recalls on other chevy with different VIN numbers. On this truck the automatic tail gate keeps ope ing and closing and opening when driving down the road, I have been lucky not to loose stuff out the back when it decides to open while driving down the road.

“shift to park” warning light appears even when vehicle is in park. Faulty solenoid in steering column.

Driving and a service trailer brake code popped up and wouldn’t turn off it is a very distracting ding.

See all problems of the 2015 Chevrolet Silverado 2500 🔎.

Tailgate going up and down on its own when in park. Now it will not open at all. There is a recall #n232426400 but dealership says it is not listed for my truck.

Instrument cluster stopped working, I have no speed or fuel remaining indicators. Dealer completed software recall work which did not fix the issue. Replacement is on back order so I am unable to drive the vehicle for an unknown amount of time.

See recall n232426400 or customer satisfaction recall n232426401. My tailgate opens on its own and the button has quit working manually. My truck is apparently not a part of the recall?.

Truck keeps losing trailer brakes, intermittent as I am towing a 10,000 lb camper. Very unsafe.

While towing our camper, the trailer brakes constantly turn off and on. The camper dealer already checked over the camper wiring, and hooked it to Ford and ram tow vehicles and could not replicate the problem. The problem is obviously with my silverado. For the additional details below; - the approximate date is anytime and everytime we tow the camper. - there could be a crash anytime the trailer brakes turn off. - a crash due to no trailer brakes could cause a fire. - an injury or fatality would be highly likely if the trailer brakes "disconnect" at the wrong time causing a crash, with or without fire. - there would most certainly be a police report if any of the above happened.

Following vehicle startup, the entire audio system defaults to a muted state, affecting all sound output channels. This includes, but is not limited ?critical safety alerts: seat belt warnings, system malfunction indicators, and door ajar chimes. ?proximity and collision warnings: parking assist chimes, rear cross-traffic alert (rcta) warnings, and backup collision intervention (bci) alerts. ?communication systems: navigation prompts and hands-free/bluetooth call audio. ?the audio failure persists until manual user intervention or the next vehicle cycle, disabling critical warning redundancy. ?safety implications ?the system-wide audio failure directly compromises the safety of vehicle occupants and surrounding pedestrians in two primary ways: ?risk to pedestrians: the silencing of proximity and backup collision warnings (rcta, bci) removes a vital layer of redundancy, significantly increasing the risk of striking vulnerable road users, such as children, while maneuvering in reverse. ?impaired driver safety & compliance: the defect also removes essential alerts like seat belt warnings and renders the mandated hands-free communication system inoperable, forcing potential driver distraction or non-compliance with driving regulations. ?conclusion ?this audio muting defect is a critical safety failure that disables mandated auditory warning systems, severely limiting the driver's ability to operate the vehicle safely and respond to immediate, unseen hazards. Immediate investigation and resolution are necessary.

The tailgate on my truck is electrically opened & closed. I've been having trouble with the tailgate opening randomly, even while driving. This has happened multiple times and can create a very dangerous situation, especially if I'm hauling something in the bed of the truck and it could possibly fall out if the tailgate were to open. Once I was hauling a bunk bed and the tailgate opened without me knowing it. Fortunately, we were driving through town on a flat road when it happened & nothing fell out. Someone behind me pulled up beside me to let me know my tailgate just opened. I recently took my truck to my local chevy dealer & they said there was no recall on it & they wanted $170 for them just to look at it. I looked online and see recall# n232426400 for it but I've never received a notice & the dealer says there is no recall on it for my truck. (I have a video of it opening & closing by itself but it's too large to send you).

Tranmission isn't running right and gas and brakes are not working properly. Also fuel pump or relay gets hot shuts off while driving.

Tailgate randomly opens and closes on its own. It will continue to do so until I start the truck up and then it will start doing it again as soon as I open my drivers side door. Also, the tailgate will no longer open by the button that is on the tailgate. The only way to open the tailgate is to push the button on the remote. And if you do that, the tailgate starts opening and closing again on its own.

There has been serious problems regarding the stabilitrak system from gm motors.

When vehicle is placed in park the safety lock will not allow the key to turn to the "off" position and be removed. The vehicle will not turn "off" any further than the accessory position. Sometimes after turning the steering wheel back and forth while working the ignition the key will release. If this does not work after a minute or so, sometimes you can start the truck and immediately turn it all the way off and get the key to release. If all of that fails the last option is to disconnect the battery. It is an intermittent issue that will happen 5 times a day for a week, and then will not replicate again for a week or two.

Tail gate opens and shut by its self while I’m going down the road have dropped a couple things out and lost them could have been worse if some one hit by jack that fell out.

The tailgate would open and close on its own. I was about ready to connect my fifth wheel RV for a trip when suddenly as I closed the truck door to back up I saw that the tailgate had opened. I proceeded to put it in park and the tailgate closed on its own. Got out as leaving the door to the pickup I walked to the rear of the truck to notice the tailgate open and close on its own. I am expecting this issue to be recalled for a repair as I have read that 2024 has this same issue and that they will be recalling trucks from 2020-2024. The issue is due to a faulty relay when wet. This vehicle is equipped with power-unlatching tailgate. I believe if this issue would have went unnoticed and continued to hook up my fifth wheel the damage would have been horrific. Thanking you in advance, sincerely, james.

While pulling my vilano fifth wheel trailer to alabama from my home state of texas the driver information center alerted me that the trailer brakes were disconnected. Then a short while later it alerted that trailer brakes were connected. This situation continued for the entire trip to alabama. When the info center indicated trailer brakes were disconnected, they were indeed not working. Several times I almost rear ended cars stopping in front of me. (the vehicle had a recall notice urging to take it in and replace the brake module shortly after purchasing it. I did this. ) once I arrived in alabama I took the vehicle to the Chevrolet dealership in foley, alabama to check the braking system. They told me there was no problem with the braking system. I retrurned to my home in little elm, texas with the problem occurring the entire trip. I finally made it home and today took the vehicle to james wood Chevrolet in denton, texas to have the braking systme checked again. They told me there was nothing wrong with the braking system. The service writer did say that because the trailer has led lights the braking system does not recognize the voltage from the trailer and that is why the brakes are disconnecting. Please help me find out how to correct this extremely dangerous condition while I am towing my 16,000 pound fifth wheel trailer.

Very limited while driving in the dark cause head lights go off and can’t drive in the rain or snow cause wipers turn off not save for my family and I and other drivers on the road thai all happen, after the dealer (lithia Chevrolet of redding, CA) performed gm recall programming on the serial data gateway module (sdgm) and related software updates, my truck began having serious electrical failures. Immediately after the recall work, all exterior lights, interior lights, and trailer lights began flickering on and off while driving. The windshield wipers also pause or stop for a moment when this happens. None of these issues existed before the recall. This appears to be a module reset or corrupted calibration caused during the recall reprogramming. Gm has already told NHTSA that they have hundreds of field complaints about flickering headlamps on 2024 trucks, and they identified lighting flicker as a safety defect. My symptoms match those issues exactly. The dealer refuses to accept responsibility, saying the recall is “closed,” but the electrical failure only began immediately after their programming. This is a safety hazard when driving at night or in the rain, and it affects the trailer braking/lighting circuits as well. I have an active gm case opened for this issue. The truck is unsafe to operate in this condition. I am requesting that NHTSA investigate whether the recall programming is causing electrical module failures and whether additional action is needed.

Power tailgate opening unexpectedly. Tailgate opens and closes without warning. The same issue that safety recall n232426400 describes.