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 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 GMC Hummer EV Taillamp Microcontroller Software Fault Disables All Rear Lighting Functions (Recall 22V141)?

The first recall ever issued against the Hummer EV Pickup covered embedded software in the microcontroller inside the LED taillamp assembly. The fault can leave one or both taillamps inoperative, or stuck fully or partially illuminated. Because the Hummer EV's rear lighting funct… Repairs typically run $0-$0. 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.

GMC · Known Issues

2022-2026 GMC Hummer EV Problems: 13 Known Issues

2022-2026 model years · 205+ owner reports · Updated August 2026

Share:@au7o.io

According to Au7o's analysis of 205+ owner reports, the 2022-2026 GMC Hummer EV has 13 documented known issues, with 6 rated critical. The most serious are Multiple Warning Lights with Speed Limited to 36 MPH ($0-$300 repair), Battery Pack Enclosure Water Ingress, Front Seat Belt Buckle Attachment Bolts Not Tightened to Specification (Recall 23V786) ($0-$0 repair), High-Voltage Battery Pack Internal Connections Mispositioned or Incorrectly Welded (Recall 23V367) ($0-$0 repair), 12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked ($0-$450 repair) and Front Passenger Airbag Harness Improper Wire Crimp Prevents Deployment (Recall 25V769) ($0-$0 repair). The most commonly reported issue is Public Charging Failures and Software Anomalies with 120 owner reports. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common GMC Hummer EV problems?

According to Au7o's analysis of 205+ owner reports, the 2022-2026 GMC Hummer EV has 13 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, 6 are rated critical and should be addressed promptly.

Is the GMC Hummer EV reliable?

The 2022-2026 GMC Hummer EV has 13 known issues documented across 205+ owner reports. 6 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 and Front Passenger Airbag Harness Improper Wire Crimp Prevents Deployment (Recall 25V769). 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 year GMC Hummer EV is the most reliable?

Reliability varies across model years of the GMC Hummer EV. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2022-2026 GMC Hummer EV with 13 documented issues documented across 205+ owner reports.

All 13 Known Issues

Other GMC Models

Frequently Asked Questions

What are the most common GMC Hummer EV problems?

Is the GMC Hummer EV reliable?

How much does it cost to fix common GMC Hummer EV problems?

What year GMC Hummer EV is the most reliable?

What is the 2022-2024 GMC Hummer EV Multiple Warning Lights with Speed Limited to 36 MPH?

Multiple Warning Lights with Speed Limited to 36 MPH#

Battery Pack Enclosure Water Ingress#

High-Voltage Battery Pack Internal Connections Mispositioned or Incorrectly Welded (Recall 23V367)#

12-Volt Auxiliary Battery Drain Leaves the Truck Completely Dead While Parked#

Public Charging Failures and Software Anomalies#

A-Pillar Water Leak Disables Door Switches#

Front Seat Belt Buckle Attachment Bolts Not Tightened to Specification (Recall 23V786)#

Front Passenger Airbag Harness Improper Wire Crimp Prevents Deployment (Recall 25V769)#

Super Cruise Intermittently Unavailable or Drops Out on Previously Mapped Roads#

Taillamp Microcontroller Software Fault Disables All Rear Lighting Functions (Recall 22V141)#

Power Retractable Tonneau Cover Motor / ECU Failure Leaves Bed Cover Stuck#

Air Ride Adaptive Suspension Inoperative with "Service Leveling System" (DTC C1197)#

Infinity Roof Removable Panel I-Bar Seals Leak Water Into the Cabin#