Complaint volume
91 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2025 GMC Sierra Complaints
91 consumer-submitted complaints on record for the 2025 GMC Sierra, grouped by component category.
91 Total complaints
3 Crash reports
0 Fire reports
0 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are engine, power train, electrical system. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 3 crash reports, 0 fire reports, 0 injury reports, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 11 complaints, with an average reported failure mileage of 18,820 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to engine, power train, electrical system?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2025 GMC Sierra?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2025 GMC Sierra
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2025 GMC Sierra complaints?
3 Crash
0 Fire
0 Injury
0 Fatality
4 Towed
1 Medical attention
What are the most common 2025 GMC Sierra complaint categories?
ENGINE 25
POWER TRAIN 10
ELECTRICAL SYSTEM 7
UNKNOWN OR OTHER 6
FORWARD COLLISION AVOIDANCE 3
POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM 3
POWER TRAIN,ENGINE 3
VISIBILITY/WIPER 3
ELECTRICAL SYSTEM,BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE 2
ENGINE AND ENGINE COOLING 2
91 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Jul 2025 | POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM | This is the second time in 2 days!! While driving ~35MPH the truck experienced a harsh transmission shift followed by a sudden loss of acceleration and entered shutdown mode to protect the engine. The steering became stiff, all dashboard warning lights illuminated, and a message appeared on the driver display indicating a transmission issue and advising to drive with caution. This created an extremely hazardous condition for me while driving on s busy stretch of road. I pulled onto the side of the road, came to a complete stop, shifted into park, and turned off the engine. Upon restarting the vehicle, the Check Engine Light remained on, and the transmission continued to shift abnormally at low speeds, including some noticeable shuddering. My GMC application recorded the issue and reminded me to schedule service. | Crash: No Fire: No | Unknown |
| Jul 2025 | SERVICE BRAKES,ENGINE,FUEL/PROPULSION SYSTEM | While in the parking lot of a local grocery store, I shifted the vehicle into reverse, at which point all dashboard warning lights immediately illuminated and the braking response became significantly weakened and nearly unresponsive. I placed the vehicle back into park, paused, and then attempted to shift into reverse again, but the dashboard alerts and brake issue persisted. This created a very unsafe driving situation because the brake system was very unresponsive. Despite the unsafe condition, I cautiously drove to my home 2miles away at a speed of under 20 MPH, requiring excessive brake pressure to bring the vehicle to a stop. I parked the vehicle in my driveway and left it there overnight. The next morning, I tested the brakes, and they seemed to return to normal so I drove 5 miles to my local GMC service center. Service Tech confirmed Check Engine Light On and reported code P0700 and P00FF in the report. | Crash: No Fire: No | Unknown |
| Jul 2025 | POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM | While driving on the highway at 70 MPH, the truck experienced a harsh transmission shift followed by a sudden loss of acceleration and entered shutdown mode to protect the engine. The steering became stiff, all dashboard warning lights illuminated, and a message appeared on the driver display indicating a transmission issue and advising to drive with caution. The RPMs surged and the truck struggled to maintain a speed of 45 MPH while the remaining at 4000 RPM. This created an extremely hazardous situation for both me and my passenger. I safely pulled into the breakdown lane, came to a complete stop, shifted into park, and turned off the engine. Upon restarting the vehicle, the Check Engine Light remained on, and the transmission continued to shift abnormally at low speeds, including noticeable shuddering. | Crash: No Fire: No | Unknown |
| Jun 2025 | STRUCTURE,UNKNOWN OR OTHER | Tailgate switch Tailgate opened on its own with trailer attached while driving damaging the top of my tailgate. No notification inside cab. No console / fob / tailgate buttons were pushed. Discovered tailgate was down after I arrived home and had done a wide u-turn in my back yard. So far dealership has done very little diagnostic wise. Two trips to dealership so far with little to no results. Now I’m scared to use my trailer or utilize the bed of the truck to haul anything due to tailgate might open on its own at 75 mph on a major interstate/ 2 lane road hurting or killing the people in the vehicles behind me. Totally unacceptable from GMC / dealer for a 70k truck. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | Truck was in "Park" idling for 20 minutes when it went from Park to "Reverse" on its own. A person sitting in a dump truck saw the backup lights on my truck come on and the truck started backing towards his truck. My truck hit his truck causing damage to my left rear bumper. | Crash: Yes Fire: No Medical attention | Unknown |
| Jun 2025 | ENGINE | The contact owns a 2025 GMC Sierra 1500. The contact stated while driving approximately 4 MPH and turning left into a parking spot, the vehicle independently accelerated. The contact stated that the brake pedal was depressed. The contact stated there was no warning light illuminated. The contact stated that the failure was intermittent, but the failure occurred while slowing down under 5 MPH and turning to the left. The contact had taken the vehicle to a local dealer; however, the failure was not duplicated. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 17,000. | Crash: No Fire: No | 17,000 |
| Jun 2025 | ENGINE,FUEL/PROPULSION SYSTEM | The vehicle was purchased for the express purpose of towing a 6,600 lbs Travel Trailer. This truck is equipt with the 3 liter Diesel engine. While towing the truck computer counts down milage available based on Def level. The count down is not mile for mile it is an exponential count down. This factor triggers a series of warnings concerning vehicle operation and impending speed restrictions. 1000 mile DEF range warning is first up. Followed shortly there after with a 300 mile DEF range warning (700 miles had never been reached to trigger the warning). The next warning is "DEF Low (red warning) speed restricted soon". Shortly there after a 500 mile count down starts for the first impending speed reduction to 65 MPH max. This is followed by other speed restrictions that will put the vehicle eventually into a 5 MPH speed restricted mode. When adding DEF to the tank the level has never been below 60% full. Its not empty as the gauge and computer indicate. With each filling of the DEF tank the range you can drive is less and less until the truck is driven without the trailer hooked up. GM has a service bulletin for this situation that has been in place since September 23, 2024 and no permanent repair of solution has been prescribed. During the 500 mile count down to the first speed restriction the instrument cluster is locked out to only display "DEF Empty" and alternately the DEF range counting down. No other safety features are visible such as engine temp or transmission temp important to know while towing. I Purchased this vehicle March 17, 2025 stating my intentions to tow a travel trailer. The dealership no GMC ever made me aware of the Service bulletin of the DEF restrictions. Had they done so I would have purchased a different vehicle with out the associated travel issues. Please reference GM Service Bulletin #24-NA-196 Document ID 6736285. This document was given to me after my 4 visit to a GMC dealership to have the issue addressed. | Crash: No Fire: No | Unknown |
| Jun 2025 | VISIBILITY/WIPER | The backup camera on the new 2025 GMC Sierra 1500 AT4 is not displaying a visible picture at night. During the day time, the picture is clear. At night, you cannot see nearly anything. This is and has been widely reported online. This poses a massive safety threat to pedestrians, pets, other vehicles, and property; due to the night vision malfunction. Please make this a RECALL on GMC to prevent any catastrophic occurrences. This is unacceptable for any 2025 vehicle and the law requires all new vehicles must have backup cameras. It must be a requirement that the cameras function in BOTH day and NIGHT. | Crash: No Fire: No | Unknown |
| May 2025 | BACK OVER PREVENTION | The contact owns a 2025 GMC Sierra 1500. The contact stated that while shifted into reverse(R) at night, the rear-view camera image was very dark, creating a hazard while reversing. The contact stated that during daylight, the image was perfect; however, at night the reverse lights failed to provide adequate illumination, causing objects on the display screen to be very dark. The contact had taken the vehicle to a local dealer to be diagnosed and was informed that there was no failure of the back over prevention system, rear camera, reverse lights, or display screen. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 2,682. | Crash: No Fire: No | 2,682 |
| May 2025 | ENGINE,FUEL/PROPULSION SYSTEM | I WAS DRIVING ON A PA ROAD AT ABOUT 30 MPH. MY CAR STOPPED IMMEDIATELY AND I HEARD THE MOTOR REV. THE CAR THEN SLAMMED INTO A STOP. | Crash: No Fire: No | Unknown |
| Apr 2025 | STRUCTURE:BODY | 2025 GMC Sierra 1500 shifted from Park to Drive uncommanded, accelerated uphill, and crashed while idling, keyfob outside of vehicle, March 2025. ESIS couldn't replicate and falsely claimed I didn't put it in Drive, despite photos and no one inside. | Crash: Yes Fire: No | Unknown |
| Mar 2025 | ENGINE | Purchased the vehicle 300 miles away. Flew out, picked up the truck and drove it home. Got back Saturday night. Woke up Sunday morning to review the features, etc. Noticed a major oil leak. Called the dealership I purchased it from. They told me to take it to a (local) dealership. I took it to my local dealership. They looked at the vehicle. Initially they thought it was a faulty valve cover gasket. They ordered the parts. When they actually started taking the vehicle apart, the issue was not the valve gasket but the crack in the valve cover itself. They replaced the valve cover. It went to the dealer on date 03/03/2025 and they gave he vehicle back to me on 03/21/2025. They said this crack had to of happened on the production line but before it got delivered to the initial dealership. | Crash: No Fire: No | Unknown |
| Feb 2025 | POWER TRAIN | Transmission is shifting rough | Crash: No Fire: No | Unknown |
| Jan 2025 | SUSPENSION | I purchased a 2025 GMC Siera Denali Ultimate in December 2024. Approximately 2 weeks after purchasing the vehicle, I was driving down the road I received a message that said, "Service Suspension". I was able to call OnStar for diagnostic and the truck was throwing code C2A0A. I took the truck into the dealership to see what the issue was. The dealership said that I apparently ran something over and it must have flown up and broke a plastic sensor cover on the lower rear left shock. I never hit anything but have no way to prove. So, I had to pay $526 for a new shock. Even if I did run over something if that area of the shock is that sensitive it should be better protected especially if it's not covered under warranty. | Crash: No Fire: No | Unknown |
| Jan 2025 | STEERING,POWER TRAIN,ENGINE | While on the freeway at 65mph the truck experience a hard gear shift, loss of acceleration, went into shut down, lost steering assist, and brakes became hard, lights came on the dash for transmission issue massage, as well as Check engine light. Safety became a major concern with loss of power in the mids of a flow off traffic at freeway speeds. Vehicle had to be towed. | Crash: No Fire: No | Unknown |
| Jan 2025 | EXTERIOR LIGHTING | Just purchased a new 2025 GMC Sierra. The backup camera system is useless at night if not in a well lit parking lot. This make the system unsafe as you cannot detect people or objects in the field of view. I've had many GMC vehicles over the years and this is the first one with this concern. | Crash: No Fire: No | Unknown |