What are the most common GMC Hummer EV problems?
According to Au7o's analysis of 205+ owner reports, the 2023 GMC Hummer EV has 11 documented issues. The most frequently reported are: Multiple Warning Lights with Speed Limited to 36 MPH, Battery Pack Enclosure Water Ingress, Front Seat Belt Buckle Attachment Bolts Not Tightened to Specification (Recall 23V786). Of these, 5 are rated critical and should be addressed promptly.
Is the GMC Hummer EV reliable?
The 2023 GMC Hummer EV has 11 known issues documented across 205+ owner reports. 5 issues are rated critical: Multiple Warning Lights with Speed Limited to 36 MPH and Battery Pack Enclosure Water Ingress and Front Seat Belt Buckle Attachment Bolts Not Tightened to Specification (Recall 23V786) and High-Voltage Battery Pack Internal Connections Mispositioned or Incorrectly Welded (Recall 23V367) and 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.
How much does it cost to fix common GMC Hummer EV 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, Multiple Warning Lights with Speed Limited to 36 MPH, typically costs $0-$300 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2022-2024 GMC Hummer EV Multiple Warning Lights with Speed Limited to 36 MPH?
Owners report a cascade of warning messages appearing simultaneously — 'One Pedal Driving Unavailable,' 'Service ESC,' 'Service Trailer Brake System,' and 'Service Active Steering System' — with the vehicle's speed limited to approximately 36 mph. The issue appears related to com… Repairs typically run $0-$300. Severity: high.
What is the 2022-2023 GMC Hummer EV Battery Pack Enclosure Water Ingress?
NHTSA campaign 22V771 covers certain 2022-2023 GMC Hummer EV Pickups. The high-voltage battery-pack enclosure may not be properly sealed, allowing water to enter the pack and increasing the risk of a loss of drive power or fire. Severity: high.
What is the 2023-2024 GMC Hummer EV Front Seat Belt Buckle Attachment Bolts Not Tightened to Specification (Recall 23V786)?
GM recalled 2023-2024 GMC Hummer EV Pickups (along with the 2024 Hummer EV SUV and 2024 Silverado EV built in the same Factory ZERO plant) because the left or right front seat belt buckle attachment bolts may not have been tightened to the specified torque during assembly. An und… Repairs typically run $0-$0. Severity: high.
What is the 2022-2023 GMC Hummer EV High-Voltage Battery Pack Internal Connections Mispositioned or Incorrectly Welded (Recall 23V367)?
GM recalled early Hummer EV Pickup builds because certain connections inside the high-voltage Ultium battery pack may be out of position or incorrectly welded. A bad or misplaced weld inside the pack creates a high-resistance or intermittent joint between modules; under load it c… Repairs typically run $0-$0. Severity: high.
What is the 2022-2025 GMC Hummer EV 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked?
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.
What is the 2022-2024 GMC Hummer EV Public Charging Failures and Software Anomalies?
Some GMC Hummer EV models experience a software anomaly that prevents the vehicle from initiating the charge sequence when plugged into public DC fast chargers. The issue may be caused by oversized or damaged terminals in the charge cord connector at frequently-used stations, but… Repairs typically run $0-$200. Severity: medium.
What is the 2022-2024 GMC Hummer EV A-Pillar Water Leak Disables Door Switches?
GM bulletin 10217073 covers specified 2022 GMC Hummer EV Pickups and directs technicians to inspect the X500 electrical connector for corrosion. Severity: medium.
What is the 2022-2025 GMC Hummer EV Air Ride Adaptive Suspension Inoperative with "Service Leveling System" (DTC C1197)?
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.
What is the 2022-2025 GMC Hummer EV Super Cruise Intermittently Unavailable or Drops Out on Previously Mapped Roads?
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.
What is the 2022-2023 GMC Hummer EV Infinity Roof Removable Panel I-Bar Seals Leak Water Into the Cabin?
The Hummer EV Pickup's signature Infinity Roof uses four removable transparent panels retained by structural cross members owners call the I-bars. On early trucks the seals around the front and rear I-bars and the center lift-off panel weatherstrip collect water in a channel inst… Repairs typically run $0-$600. Severity: medium.
What is the 2022-2024 GMC Hummer EV Power Retractable Tonneau Cover Motor / ECU Failure Leaves Bed Cover Stuck?
The $3,695 hard power-retractable tonneau cover offered on the Hummer EV Pickup - a pickup-only option that does not exist on the SUV - has a documented failure of its drive motor and its electronic control unit. Affected covers stop responding to the in-bed buttons, the interior… Repairs typically run $0-$1,200. Severity: low.
