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GMC Sierra EV: Battery Warranty

Model years

Model yearWarranty booklet
2024GMC Electric Vehicle Limited Warranty and Owner Assistance Information, 2024 (January 2025 printing)
2025GMC Electric Vehicle Limited Warranty and Owner Assistance Information, 2025 (May 2024 printing)
20262026 GMC Electric Vehicle Limited Warranty and Owner Assistance Information, edition 19680588B
20272027 GMC Electric Vehicle Limited Warranty and Owner Assistance Information (October 2026 printing)

Coverage at a glance

ItemAnswer
What is coveredThe propulsion battery pack and its internal components
Term8 years or 100,000 miles, whichever comes first
Capacity floor75% of its original value; the battery is replaced or repaired if capacity falls below it during the warranty period, as determined by a certified dealer
Replacement batteryOne appropriate for the age and mileage of the vehicle
Repair partsNew or refurbished components, at GMC's discretion, for a propulsion battery that needs service due to a defect in materials or workmanship
Where repairs are done2024: an EV Certified GMC dealer facility. 2025, 2026, 2027: an authorized GMC dealership
Cost to the ownerTowing, parts and labor at no charge
Transfers to a later ownerYes. The warranty is provided to the original and any subsequent owners of the vehicle during the warranty period. 2024: the battery warranty is transferable at no cost to any subsequent person who assumes ownership of the vehicle within the 8 years or 100,000 miles term, with no deductibles
Clock startsThe date the vehicle is first delivered or put in use. 2024: the battery term runs from the original in-service date of the vehicle
Vehicles it applies to2024: GMC vehicles registered in the United States and normally operated in the United States. 2025, 2026, 2027: GMC vehicles originally sold, registered, and normally operated in the United States
Bumper-to-bumper coverage3 years or 36,000 miles, whichever comes first

Using the pack for something other than driving

Model years 2025, 2026 and 2027:

CoveredNot covered
Normal use for backup power during outages, reasonably selling energy back to the electrical grid, and reasonable use as a mobile power source (job site power or vehicle to vehicle charging)Excessive use for non-propulsion purposes, including semi-permanent or permanent daily power provisions; General Motors reserves the right to curtail excessive non-propulsion use that is determined to be harmful to the battery

What is not covered

The booklets' exclusions include:

  • 2025 and 2026: damage to the vehicle's battery from incompatible charging methods, or from an adapter that is not sold or approved by General Motors. 2027: incompatible charging methods, or an adapter or charger that is not sold or approved by General Motors.
  • 2025, 2026 and 2027: damage resulting from failure to install Over-the-Air software updates; the owner is responsible for ensuring all GMC provided Over-the-Air software updates are installed within 45 days of software availability to the vehicle.
  • Alteration, modification, or tampering to the vehicle, including, but not limited to, the body, chassis, software, or other components after final assembly.
  • Non-GM parts, control module calibrations, software modifications, and other alterations not issued through General Motors: they void the coverage for the components they damage or otherwise affect.
  • Damage from aftermarket vehicle propulsion enhancement products or modifications, which may not be covered.
  • Damage caused by collision, fire, theft, freezing, vandalism, riot, explosion, or objects striking the vehicle.
  • Water or fluid contamination.
  • Damage caused by failure to follow the recommended maintenance schedule intervals.
  • Vehicles where the odometer has been disconnected, its reading altered, or mileage cannot be determined.
  • Vehicles currently or previously titled as salvaged, scrapped, junked, or otherwise considered a total loss: the warranty is void.

See it for yourself

Scope note

US-market GMC Sierra EV, model years 2024 through 2027, each read from the GMC electric-vehicle warranty booklet GM's manuals index files against the Sierra EV for that year; the booklets also carry terms marked "For Hummer EV only," which are left out. The booklet delivered with a specific car is the authority for that car.