Electrical System Problems of GMC Sierra 1500 - part 1

The front forward-facing camera module has failed, causing cruise control and driver-assistance features to become inoperative. Dealer diagnosis indicates the front camera must be replaced and recalibrated in order to restore cruise control and safety systems. This failure disables cruise control and driver-assist features that were standard equipment on the vehicle at purchase, resulting in a sudden loss of functionality while driving. The dealer has provided a repair estimate of approximately $1,150, including parts, labor, and required calibration, at owner expense. Based on similar reports from other owners, this appears to be a recurring issue affecting this model year.

See all problems of the 2022 GMC Sierra 1500 🔎.

The contact owned a 2023 GMC Sierra 1500. The contact stated that while the vehicle was parked on the driveway, it caught on fire. The contact was inside the residence when a passerby knocked on the door and informed the contact of the fire. A neighbor helped extinguish the fire. When the contact stepped outside, the flames were by the instrument panel; the flames had risen to the rooftop. The front windshield was shattered. The fire was contained to the cabin. The fire department was called. The contact stated that weeks before the fire started, an abnormal sound could be heard coming from the engine. The contact removed the battery from the vehicle. The vehicle was not insured. The manufacturer was not made aware of the failure. The failure mileage was unknown.  .

See all problems of the 2023 GMC Sierra 1500 🔎.

While driving the vehicle I hit a bump on the road and all 4 windows in the vehicle went down. I did not push any buttons. I tried to close the windows and they would not close. Nothing happened when I attempted to close them. It was 10 degrees out I pulled over, and tried again with out success. I shut the car off, opened the door and closed it and restarted the car after a few minutes. I was able to close 3 of the 4 windows. I started driving and eventually I was able to close the last window. On my drive I late hit another bump and again all 4 windows opened with out any action by me, I was on a highway, I again pulled over and was not able to close the windows. After I continued driving I was able to close 3 of the 4 windows and eventually the 4th. This is a safety issue.

See all problems of the 2024 GMC Sierra 1500 🔎.

I was driving on an overpass and suddenly loss propulsion in my vehicle. My vehicle stopped all of a sudden and while driving, leaving me stranded in the middle of the roadway blocking traffic. Numerous motorists stopped to give a hand but the vehicle would not switch gears from park, to neutral to even give me a hand moving the vehicle out of the roadway to the side/shoulder. Due to this issue, authorities were dispatched to my location to conduct traffic control and subsequently called in aide of a tow truck to safely move my vehicle to a better location. I used onstar in my vehicle and also spoke with a representative who notated the incident and I was advised that a tow truck would take approximately 90 mins to 2 hours to reach me. In this instance, that was too long of a wait for events going wrong with the vehicle itself and was subsequently transferred from the roadway to a GMC dealership, namely group 1 south on the gulf freeway. They are handling my repairs and have diagnosed that the engine needs to be completely replaced and are in the process of repairs. If any information is needed regarding status or repairs, please contact the dealership directly as I do not have any physical or written information on the status of my vehicle. Attached is the towing receipt.

To start off my truck has been to the dealership multiple time for the camera. After third time in the shop they fixed that issue. Then the infotainment started acting up after about 4 times in the shop it was fixed. They gave me the prescribed fix for the engine recall in November. Engine passed the test. Then 3 weeks ago the engine siezed up from the crank and bearings on the interstate doing 70 pulling a trailer in traffic. Leaveing me and my dad in the middle of the interstate. I had to have it towed 2 hours to my house. After the prescribed engine fix. They replaced the motor in 3 days. Great right? no they did not test drive long enough. Or they would have felt the shudder that developed after the new engine went in. It is now about to go back to the shop. Because of the shudder at low rpm and im haveing electrical issues again as well . My remote start also stopped working after the engine replacement.

Setting in a parking lot and the tailgate fell open and hit another car. The tailgate was closed and has fell open 3 more times while the vehicle is in park and one time it was powered off.

2026 Sierra 1500 at4 with 3. 0l duramax diesel. Three major issues. 1. 2960 miles, thrust bearing failure caused low oil pressure and internal damage. Vehicle needs complete engine replacement. The truck is still at the dealer with no eta on engine arrival and replacement. 2. Vehicle has severe electrical issues. Battery replaced on second day of ownership due to over charge and smoking. The truck would randomly lose the ability to produce sound through infotainment system on start. This includes warning sounds and audible turn signal sound. Dealer said it’s caused by faulty amp which was replaced. 3. The truck shut off (full system shutdown) and the transmission failed over to neutral while driving on the highway and failed to restart. Barely restarted on second attempt. Dealer has no idea why it is doing it. However the vehicle was throwing multiple code related to transmission module failure, brake module failure, transmission module failure, etc.

Lost brakes and couldn’t stop the truck.

Started car via remote start. When I went out to the car I noticed smoke in the cab. I then observed the rear power slide window to be smoking and further discovered the rear defroster wires the be smoldering creating considerable smoke. The tempered glass then began to spider and completely cracked. There is a former recall on the rear slide window involving fire hazards and the wiring components. It should also be noted that our 9 month old’s car seat is directly below the window and defroster wiring were the smoldering took place. No warnings lamps were observed prior to the incident.

See all problems of the 2017 GMC Sierra 1500 🔎.

I was driving up the road truck cranked up fine started a morning commute, on cruise control the truck instantly out of nowhere lost power completely with no signs of anything and engine won’t attempt to turn over now. I fear the worst has happened which would be catastrophic internal failure for to a faulty engine & its internals.

See all problems of the 2019 GMC Sierra 1500 🔎.

The windshield defroster and heater blower speed reduces and/or shuts off shortly after accelerating to highway range speeds. Blowing snow from alaska roads will melt and refreeze on the windshield reducing visibility creating a safety hazard. The truck has not been successfully repaired after multiple and lengthy attempts. The heated steering wheel also malfunctions intermittently. The blower motor does seem to come back up to speed when vehicle speed is reduced to city speeds but is intermittent also.

The intermediate speed sensor 2 and internal transmission harness failed. The repair was to replace the internal transmission harness and intermediate speed sensor. This vehicle is a 2021 and I was told this was recalled on a 2022 only.

See all problems of the 2021 GMC Sierra 1500 🔎.

The morning of December 12th, 2025 I used my vehicle to transport my daughter approximately 5 miles round trip from our home to drop her off at daycare and then I returned home. I used my front and rear defrost elements to expedite removal of heavy condensation which had formed on all windows overnight. This was approximately 7 am. I parked my truck in the driveway and went inside until approximately 11:45 am when I went to leave in my truck and noticed the rear sliding window had shattered. The window shattered and distributed tempered glass fragments all over the inside of the cab. Only approximately 10% of the window remained intact. I then reviewed the security camera footage from my driveway and discovered that the window failed entirely on its own with nothing hitting/striking/touching the window, nor any humans or animals in the vicinity. I attempted to take the vehicle to a GMC service department this morning (Dec 13) but due to their demand to keep the vehicle for 2-3 days to investigate yet unable to provide a loaner vehicle, I was unable to leave the vehicle in their possession and returned home. I plan to continue to contact GMC dealership service departments in hope I can find one which can provide a loaner vehicle, as I will need transportation to and from work in the coming days. I do have video footage of the incident although I am unable to add it below.

See all problems of the 2020 GMC Sierra 1500 🔎.

Heated steering wheel reaches temps of 137 - 143 degrees. Should have the ability for the owner to select a lower temperature setting the same as the heated seats.

See all problems of the 2025 GMC Sierra 1500 🔎.

The onstar vehicle locater, gps maps, clock (auto update) are not responsive as of the 2nd week of December 2025. My truck cannot be located via onstar, I cannot use the gps maps for directions, and the clock reads 12 minutes fast when I put it into auto update mode. Reported to my GMC dealer (elizabeth city GMC, elizabeth city, nc 27909, and had in for service 3 times without correction of the issue! the dealership conducted a software system update which cost me $400. 00, and still did not correct the issue. I spoke with onstar three (3) times to try and correct issues but they did not resolve the problems either. Onstar stated it is a GMC issue. . . . . . . . . . . . My last service at the elizabeth city GMC dealer the service tech stated the onstar module is bad and requires replacement, and stated it will be an additional $550. 00 +/-!!! please advise and assist in further action I can take as this issue should be a warranty issue and replaced by GMC and/or onstar!!! class action suit in line! thank you.

1. )when driving the vehicle it will randomly shutoff while driving with loss of brakes and steering until it will randomly turn back on. The vehicle experiences intermittent electronic and drivability malfunctions. The issue appears to involve one or more vehicle control modules and/or electronic systems. At times, warning lights and system messages appear, and vehicle performance is affected. The vehicle is available for inspection upon request. 2. )these failures create a serious safety risk because they occur without warning while driving. The vehicle may lose normal functionality, display multiple warnings, or behave unpredictably. If this occurs in traffic, at speed, or while maneuvering, it could increase the risk of a crash or leave the vehicle stranded in an unsafe location. Furthermore on 3 separate circumstances I came close to crashing the vehicle putting at risk lives in the vehicle and outside. 3. )the problem is intermittent and has been difficult to reproduce on demand. I have taken the truck to the dealership multiple times. The dealership has stated that because the issue is not actively occurring when they have the vehicle, they have been unable to duplicate the concern and have instructed me to continue driving it until the issue happens again. Despite this, the problem continues to return during normal use. 4. )the vehicle has been inspected by the authorized dealership on multiple occasions. To my knowledge, it has not been inspected directly by the manufacturer, police, or insurance representatives. 5. )intermittent warning lights and system messages appear, including at times a check engine light and other alerts. These warnings may appear suddenly as the truck shuts off and then disappear after the vehicle is turned off and restarted. Another thing to point out is that the audio and turn signal chime cut off randomly. The issue first began while the vehicle was already in normal use and has continued to reoccur since.

Tailgate unlatched by itself, first time I was connected to a trailer and it damaged the tailgate. Multiple (4+) times afterwards while being parked in garage tailgate opens by itself all during the same day could not get this to stop. Called dealership today for appointment where they could get me in the shop in the middle of the week, but they told me that this issue is known but not covered under my VIN.

Every winter when the temps dip into single digits something on the truck freezes and causes a major malfunction. This winter (2025) is the second time I’ve had a problem with the truck freezing up and leaving me in “limp mode”. Last year the same thing happened. The def sensors freeze up and the heater shorts out leaving me stranded in my $70,000 truck. I now have 34miles remaining until my truck is limited to 55mph. This is a serious problem.

The contact owns a 2016 GMC Sierra 1500. The contact stated that while idling in the drive-through at a pharmacy, the contact noticed smoke coming from the rear window, and the rear window shattered. The contact stated that the defroster was activated at the time of the failure. There was no injury sustained. The contact deactivated the defroster and drove to the residence, where the contact disconnected the defroster fuse. The contact related the failure to customer satisfaction program number: n192265660 (rear window defroster thermal events). The vehicle was not diagnosed or repaired by an independent mechanic. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline to report the failure. The failure mileage was approximately 139,250.

See all problems of the 2016 GMC Sierra 1500 🔎.

Onstar telecommunications module failed within 5 months of ownership. Gps and in car navigation goes crazy showing incorrect position which is distracting on the infotainmet screen. Been almost 4 weeks with no estimate of part availability from gm.

The contact owns a 2016 GMC Sierra 1500. The contact stated that her husband remote started the vehicle. The contact stated that when the vehicle was started, the defrosters automatically activated. The vehicle warmed up for approximately 2 to 3 minutes. The contact stated that while leaving the driveway, her husband stopped the vehicle to assist with moving a lawn mower. Upon returning to the vehicle and looking through the glass her husband observed that there was smoke coming from the rear glass. The contact stated that her husband unlocked the rear doors and released the folding rear seat and saw that the defroster unit was on fire and smoking. The contact stated that her husband turned the vehicle off and the flames were self-extinguished; however, approximately 45-seconds later the driver’s side rear panel window shattered. The vehicle was not taken to a local dealer or independent mechanic to be diagnosed or repaired. The contact researched online and related the failure to customer satisfaction program number: n192265660 - rear window defroster thermal events (electrical system, visibility). The manufacturer was informed of the failure and referred the contact to the NHTSA hotline to report the failure. The failure mileage was approximately 89,000.

Experience a automatic ota update to the info system on my 2021 GMC sierra(I did not iniciate) which burnt out the radio module which controls the info system. I am being charged $1,300+ for repair due to vehicle being out of warranty(52,000 miles) and no recall on this vehicle model for this issue. GMC does have a recall for this exact issue on the 2021 GMC tahoe models, but not the GMC sierra. If the GMC utilizes the same componets for both models of vehicle how doe the recall#n202319250 not cover the exact same issue on both models?.

The telemetry/onstar unit stopped working on my 2023 GMC Sierra 1500 denali. This renders the onstar unit unusable for both data and calling onstar. In the event of an accident, the driver could not call onstar for help and onstar would not get an automatic notification that there had been a crash with the vehicle's location. The failure of the unit has also caused a code indicating low brake system voltage. I know that is not the case in my vehicle at this time, but if the brake system does start to fail, there is no way to know if the code is real or just a result of the telematics system failing. This failure occurred shortly after an over-the-air software update GMC sent out. I have seen numerous reports of people with the exact same year and model having the same issue. The unit worked fine for 2. 5 years and after the software update, it was bricked. Gm wants in the neighborhood of $1,000 to replace and install the unit but they are on backorder with eta's 3 or 4 months out. They are also coded with the VIN so there is no other option than to go to the dealership for repair. The part cannot be ordered from an aftermarket manufacturer or from gm's official parts website, local dealership only. In order to get this important safety feature working again, the only option is to go have it fixed at the dealership, which charges $200/hr in labor on top of the $500 part needed. The 3-4 month backorder should be enough evidence that GMC has had a widespread failure of these units. GMC basically broke the telemetry/onstar units with a software update and wants it's customers to pay for their mistake. If this is not considered an important enough of a safety feature for NHTSA to do an investigation on, this matter should be investigated as an illegal business practice with the ftc or department of justice. Gm has effectively created a problem (through the software update) that only they can fix and then charging customers whose warranty has expired.

Muti pro tailgate has electric issues due to moisture. Tailgate will open up driving down the road.

The contact owns a 2026 GMC Sierra 1500. The contact stated that upon starting the vehicle and shifting into reverse(r), the vehicle failed to move while depressing the accelerator pedal. The contact felt a hesitation while depressing the brake and accelerator pedals, and the contact then attempted to restart the vehicle. The contact restarted the vehicl;e however, while attempting to accelerate, the brakes independently activated. Despite the repeated failure, the contact was able to pull into a gas station to restart the vehicle. The contact stated that after several attempts, the vehicle finally resumed normal operation, and the contact drove the vehicle to the residence. The next day, the contact test drove the vehicle, and the failure reoccurred while the contact was attempting to park the vehicle in a parking spot. The vehicle was taken to a dealer, where a diagnostic test produced 7 fault codes; however, the mechanic was unable to repair the vehicle. The manufacturer was notified of the failure, and the manufacturer stated that there was a communication disconnect between the contact and the dealer. A case was filed with the manufacturer. The vehicle was not repaired. The failure mileage was approximately 300.

Telematics module failed directly after update, vehicle is outside of warranty (by mileage) but only 3 years old. No gps, onstar, and several other features that rely on this system to operate. Several dealers would not even look at it when calling for appointment, one dealer stated that the part was on back order for up to 2 years and did not want to waste the time to look at it. Upon research, this appears to be a very common problem on all gm models with similar outcome.

After pulling my 2024 GMC Sierra 1500 slt into a parking space at a local store, I shut off the engine. I observed the lighted ignition switch and the dash icons were illuminated even though the engine was completely off. Having had my foot on the brake at the time I decided to test the ignition switch to determine why it was lit while the engine was off. When I pressed the start button there was a loud, whining starter like sound, grinding like metal on metal. The noise was so alarming that I immediately took my hand off the ignition. The engine was still off. After waiting a significant amount of time I tried to restart the engine. Exactly the same thing occurred. On the final attempt to start the engine, 15-20 minutes later, it started and ran quietly like nothing had ever happened. On returning to the vehicle my wife asked what all the loud grinding noise was about. She had heard it while she was inside the store. I advised her it was our truck! the incident was shocking to us both and because of its bizarre nature I was afraid to drive the vehicle back home. As I already had an appointment on November 6 at deluz chevy for another incident, I called them on November 3 to add this incident to the existing appointment. This incident was added to the November 6 appointment. Unfortunately the service department did not assess the previous incident and only addressed this incident.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 mph and making a turn, the vehicle lost motive power. There were several unknown warning lights illuminated after the failure. Upon investigation, the failure was related to NHTSA campaign number: 25v274000 (engine and engine cooling). The vehicle was towed to an independent mechanic, where it was diagnosed with lifter failure and camshaft damage. The vehicle was repaired. The local dealer was not contacted. The manufacturer was contacted and opened a case, and referred the contact to the local dealer for assistance. The failure mileage was approximately 86,960.

The vehicle will loose all interior audio to include stereo, turn signals, and all other audio safety features for several hours at a time. GMC has done three repairs and still no resolution. Lack on audio impacts the safety of the vehicle. Has happened dozens of times and appears to be larger gm issue that is u resolved. Has occurred at least 20 times since I bought the vehicle 10 months ago.

Complete engine failure. I was driving approximately 55 miles an hour, then all of a sudden the cruise control automatically shut off and a series of alarms are triggered. When pressing the accelerator pedal, the engine vibrated excessively in cleary indicated catastrophic engine failure. I was lucky enough to make it to the nearby dealer who confirmed a complete engine failure. I ended up buying a new vehicle that day to avoid being stranded.

This truck needs 2500. 00 in work to replace electrical harness after months of problems and evaporating leaks.

Coolant control valve and engine cooling fan.

I am an active u. S. Air force member. My 2021 GMC Sierra 1500 failed gm recall n252494003 on sept 29, 2025 (l87 engine loss of propulsion). Gm states this defect can cause sudden engine failure and loss of propulsion, increasing crash risk. Despite the confirmed failure, ocean Cadillac (miami, FL) told me to keep driving the unsafe vehicle and refused all courtesy transportation. The service manager admitted in writing that the engine failed, the defect can cause loss of propulsion, and the replacement engine is delayed under gm national control for up to 3 months — yet they still denied me a loaner or rental. His statements contradict the gm documents he attached: • gm bulletin dcs7222 says courtesy transportation can be provided during l87 recall downtime and dealers must consider loaners/rentals. • gm faq n252494002 says courtesy transportation is available for this recall. • gm faq lists recall symptoms (check engine light, hesitation, high rpm, reduced power) — not battery drain. • gm states: “if the engine fails, the vehicle will lose propulsion. ” ocean Cadillac ignored these rules and put me back on the road in a known unsafe vehicle. As an american manufacturer, gm has a responsibility to protect american drivers. Their failure to follow recall procedures placed me, my family, and other motorists at risk. I request NHTSA investigate whether gm/ocean Cadillac are complying with recall safety requirements and whether customers are being told to drive unsafe vehicles after confirmed failures.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at various speeds, the tailgate opened unintendedly. The contact stated that the failure occurred while the vehicle was idling or while parked. The vehicle was taken to the dealer, where it was diagnosed, and the contact was informed that the failure was caused by a corroded wire. The dealer determined that the wire and the tailgate switch needed to be replaced. The dealer confirmed that the vehicle was not included in a recall or covered under warranty. The vehicle was not repaired but was scheduled for repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,000. The VIN was not available.

Every time I pull the truck into my garage or a parking stall at low speeds while using the front park sensor it will shut off with the automatic start stop while still in motion. Then you have to let off the brake pedal for it to start and sometimes the vehicle will search forward.