2024 GMC Hummer EV SUV

The infotainment system on this 2024 GMC Hummer EV fails during driving in a way that creates a safety hazard. The system controls the rearview camera, drive mode display, turn signal audio feedback, charging and range information, climate controls, and all audible warnings. When it fails: - Screen goes completely black during drives, sometimes for 10 or more minutes. No camera, no drive info, no warnings visible. On one occasion I had to pull the vehicle over because the screen was frozen for over 10 minutes while driving. - Audio cuts out completely including turn signal clicks and warning chimes. The vehicle has to sit powered down for 4 to 5 or more hours before audio works again. - Apple CarPlay freezes and becomes unresponsive. Screen cannot be controlled. The dealer has attempted repairs on this defect at least 6 times across multiple service visits, including a complete radio module replacement in May 2026, multiple software resets, and OTA updates. None has permanently resolved the issue. Written statements on official repair orders from the dealer confirm GM has no fix. One recent RO stated "Condition currently under engineering investigation for permanent repair." Another had "NO FIX AT THIS TIME" written on it twice. The service advisor has also confirmed in writing that GM engineering has no permanent repair available. GM has acknowledged the defect exists on 2024 Hummer EVs through published service bulletins but has not issued a repair. On a vehicle this heavy with cameras, blind spot monitors, and driver assistance systems that run through the central display, losing the display at speed is dangerous. Vehicle and all documentation available for inspection upon request.

NHTSA ID

11771237

Incident

Jan 26, 2026

This 2024 GMC Hummer EV has had multiple safety-critical fasteners found loose from factory assembly, discovered across several service visits at an authorized GM dealer. 1. POWER STEERING: Diagnostic code U0131 00 was found - Loss Communication with Power Steering Control Module. Dealer traced the fault to loose ground bolts G176 and G177 at the power steering control module. Technician was able to turn the bolts 1/4 to 1/2 turn to tighten them. This caused a Service Power Steering - Drive With Care warning plus a 4WD Temporarily Unavailable warning simultaneously. Steering physically became harder to turn during driving. GM TAC case 107017705 was opened. 2. DRIVE SHAFT BOLT: Found loose and replaced. 3. ALL FOUR AXLE NUTS LOOSE: On one visit the driver rear axle nut was found loose and replaced. On the next visit one week later, the dealer found THREE MORE loose axle nuts - driver front, passenger front, and passenger rear. All four axle nuts on this vehicle were loose from the factory and had to be replaced as single-use fasteners. Symptom was intermittent loud clunking noises from all four corners when stopping, starting, and braking. Loose axle nuts on a 9000+ lb EV are a catastrophic safety risk with potential for wheel separation. Loose power steering ground bolts caused real reduction of steering assist on this heavy vehicle during driving on public roads. My child rides in this vehicle. The pattern of multiple loose critical fasteners discovered across multiple service visits strongly suggests systemic manufacturing or assembly quality failure on this specific vehicle, and possibly on other 2024 Hummer EVs built in the same window. All issues are documented on official dealer repair orders. Vehicle and all documentation are available for inspection upon request.

NHTSA ID

11771235

Incident

Aug 6, 2026

The contact owns a 2024 GMC Hummer EV SUV. The contact stated that the vehicle was previously repaired under Customer Satisfaction Program: N242468850 (2022-2025 Hummer EV Roof & Tonneau Cover); however, the failure occurred a year after the Customer Satisfaction Program repair. The contact stated there was water inside the cabin of the vehicle and the rear seats were soaked. There was water found on the floorboard and dashboard, accompanied by a foul odor. The vehicle was taken to the dealer, where the engineers inspected and cleaned the drains and seals. The failure persisted, and the vehicle was taken to the dealer a second time, where the drains and seals were cleaned a second time. The failure reoccurred, and the vehicle was taken back to the dealer a third time. The dealer determined that there was mold and an inch of water inside the vehicle, and the wiring needed to be replaced. However, the manufacturer instructed the dealer to stop working on the vehicle. The manufacturer was notified of the failure and denied a buyback request, stating that debris had caused the failure. The failure mileage was 6,962.

NHTSA ID

11768304

Incident

Mar 6, 2026

Mileage

6,962 mi

During the morning drive, while in one pedal driving mode, the need to apply more brake due to a quick change of traffic lights occurred. The brakes felt hard and the vehicle did not feel like it was stopping as quickly as it normally would. When I parked the vehicle and exited no warning lights or other items were shown on the dash. Once I got back in the vehicle, a MIL light was lit and the "Service Brake Assist" message was displayed. With the vehicle running, it would not move either forward or reverse. Multiple attempts were made to move the vehicle, it was blocking a flow of truck traffic at the business. No movement occurred. OnStar was contacted for road side assistance and a Wrecker was dispatched. The vehicle was taken to the dealership for inspection and repair. Still waiting on what the issue with the vehicle is. I felt my personal safety was at risk for the slow braking/hard pedal and also when parked and the vehicle immobilized.

NHTSA ID

11759393

Incident

Aug 25, 2026

While operating my 2024 GMC Hummer EV at a low speed in a school zone, I came to a complete stop at a stop sign and began making a left turn. As I initiated the turn, the steering wheel suddenly locked and became unresponsive. I was unable to turn the wheel back to the right or regain control of the vehicle’s direction. At the same time, the vehicle did not respond as expected when attempting to stop. Because I could not steer or properly control the vehicle, I collided with another vehicle. The impact with the other vehicle is what ultimately brought my vehicle to a stop. During the incident, multiple warning messages appeared on the dashboard, including a message indicating: “Service Steering System.” My vehicle sustained minimal damage due to its height (a bent side step), however the other vehicle sustained damage. Police responded to the scene and a report was filed. I was NOT issued a citation. (see report attached) The vehicle has since been towed to Northwest Hills Chevy/GMC in Torrington CT for inspection by the GMC manufacturer. This incident raises serious safety concerns, as the sudden loss of steering control at low speed could have resulted in significantly more severe consequences under different circumstances. I was in a school zone at dismissal time going to pick up my son. This appears to be a potential mechanical or electronic steering system failure. I believe this represents a serious safety defect that should be investigated to prevent similar incidents.

NHTSA ID

11725052

Incident

Mar 12, 2026

Charge port door on vehicle will not open regardless of what you do.

NHTSA ID

11724936

Incident

Mar 1, 2026

The frunk latch on the vehicle becomes faulty and does not recognize the hood being latched and secure when it is. While driving, the vehicle without warning will immediately limit speed to 26mph regardless of existing vehicle speed. This has occurred multiple times when driving on the highway with the vehicle immediately decelerating and then saying the hood (frunk) is open. This poses a serious danger to not only the occupants of the vehicle but also those around them on the highway. This occurred when traveling at highway speed in the middle lane. This resulted in the inability to change lanes to pull off the highway due to the drastic reduction in speed in reference to the other vehicles on the highway causing a high stress and high risk situation for the driver and occupants.

NHTSA ID

11716487

Incident

Feb 7, 2026

The vehicle was no longer able to charge, and therefore could be stranded. Yes, the vehicle is currently back at the dealership and available for inspection. Without ability to charge, the vehicle could shutdown and not be able to restart. Yes. It was at the dealer from 6/27 to 8/20 and then the issue re-exhibited on 9/3 and it was returned to the dealership. Yes, it was reviewed by the dealership and returned, only to happen again within 100 miles. Yes, the Service Engine Soon light appears.

NHTSA ID

11685343

Incident

Jun 27, 2025

This preliminary information is to inform technicians and General Motors customers that the truck will still operate for the electric trailer brake but the output will not be displayed.

This Preliminary Information provides diagnostic tips and guidance for situations where key fobs cannot be learned or programmed successfully.

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3

This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

This Preliminary information communicates that it is normal for the tailgate to drop faster than it used to after the GM Accessory Kicker Audio System is installed.

Vehicles may display a MIL or “Service High Voltage” message, with DTC P061B stored as current or history. The condition may be caused by a software anomaly and may clear after a vehicle sleep cycle. install the lasted program.