2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 GMC Hummer EV has 3 documented known issues, with 1 rated critical. The most serious is 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked ($0-$450 repair). DIY maintenance guides at au7o.io.
EXTERIOR LIGHTING:TAIL LIGHTS
General Motors, LLC (GM) is recalling certain 2022 GMC Hummer EV vehicles. Taillight software can cause one or both rear taillights to become inoperative, or remain fully or partially illuminated. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
General Motors, LLC (GM) is recalling certain 2022 BrightDrop EV600 and 2022-2023 GMC Hummer EV Pickup electric vehicles. The high voltage battery pack enclosure may not be properly sealed, allowing water to enter the pack.
ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
General Motors, LLC (GM) is recalling certain 2022 GMC Hummer EV and 2023 Cadillac Lyriq vehicles. Certain connections within the high-voltage battery pack may be out of position or incorrectly welded, which can cause a loss of drive power.
SEAT BELTS:FRONT:ANCHORAGE
General Motors, LLC (GM) is recalling certain 2023-2024 GMC Hummer EV pick up, 2024 GMC Hummer EV SUV, and 2024 Chevrolet Silverado EV vehicles. The left or right front seat belt buckle attachment bolts may not be tightened properly.
ELECTRICAL SYSTEM:WIRING
General Motors, LLC (GM) is recalling certain 2024 Cadillac Lyriq, Chevrolet Blazer EV, Chevrolet Silverado EV, GMC Hummer EV SUV, and GMC Sierra EV vehicles. The electric motors in the rear drive units may have insufficiently insulated wires that can contact each other, resulting in a loss of drive power.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 GMC Hummer EV has 3 documented issues. The most frequently reported are: 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked, Air Ride Adaptive Suspension Inoperative with "Service Leveling System" (DTC C1197), Super Cruise Intermittently Unavailable or Drops Out on Previously Mapped Roads. Of these, 1 is rated critical and should be addressed promptly.
The 2025 GMC Hummer EV has 3 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known GMC Hummer EV issues range from $0 to $1,800, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked, typically costs $0-$450 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
One of the most frequently reported real-world failures on the Hummer EV Pickup is parasitic drain on the 12V auxiliary battery, which leaves an otherwise fully charged truck totally unresponsive - no doors, no screens, no ability to shift or start. Two mechanisms drive it. First… Repairs typically run $0-$450. Severity: high.
GM bulletin PIT6144G documents 2022-2025 GMC Hummer EV owners reporting that the air leveling suspension stops working, with a "Service Leveling System" message in the driver display and DTC C1197 SYM92 stored in the automatic level control module. On a truck that weighs over 9,0… Repairs typically run $0-$1,800. Severity: medium.
Hummer EV Pickup owners report that Super Cruise, a headline feature of the truck, works inconsistently - repeatedly refusing to engage on the same stretches of interstate and tollway where it worked before, and dropping out mid-drive. The dash messaging varies between "Super Cru… Repairs typically run $0-$1,500. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
