Chevrolet Warranty Explained (by a Former Warranty Administrator)
Quick answer
Chevrolet covers new vehicles for 3 years/36,000 miles bumper-to-bumper and 5 years/60,000 miles on the powertrain, with 6-year/100,000-mile rust-through protection and roadside assistance for 5 years/60,000 miles. Chevy EVs add 8-year/100,000-mile battery and propulsion coverage, extended to 10 years/150,000 miles in CARB-emissions states.
Chevrolet's terms match the Detroit standard; 3/36 basic, 5/60 powertrain, with one quietly better number: rust-through coverage runs 6 years/100,000 miles, the longest mileage-capped corrosion term among mainstream brands. The catch is GM's two-tier corrosion language: a hole through the panel gets the 6/100 term, but surface rust and paint corrosion only get 3/36. In snow-belt states, that distinction decides claims every winter.
At the claims counter, GM paperwork is process-heavy but predictable. GM tracks claims by VIN against published special coverages and Technical Service Bulletins, and Chevrolet issues a lot of them. Before paying out of pocket for anything between 36,000 and 100,000 miles, always have a dealer run your VIN: special-coverage extensions (fuel pumps, 8-speed transmission shudder, Bolt batteries) have quietly paid for repairs that owners assumed were theirs to eat.
On the EV side, the Ultium-era battery warranty is the federal 8/100 with a capacity-retention floor, and GM extends EV towing to match it. Bolt owners should know their battery history specifically: recall replacements reset the component clock in many cases, which can leave a used Bolt with more battery coverage than its age suggests. Ask the dealer to print the warranty block and recall history before you buy.
Coverage at a glance
Years OR miles, whichever comes first. US-market terms.
Basic (bumper-to-bumper)
3 years / 36,000 mi
Parts and labor to correct any defect in materials or workmanship: electronics, infotainment, trim, A/C, sensors. Also the term for cosmetic (surface) corrosion coverage.
Powertrain
5 years / 60,000 mi
Engine, transmission, transfer case, and drive-axle internals. Duramax diesel engines carry their own longer schedule (historically 5 years/100,000 miles); confirm in your booklet.
Rust-through (perforation)
6 years / 100,000 mi
An actual hole corroded through body sheet metal. Note GM's split: rust-through gets 6/100, while cosmetic surface corrosion only gets the 3/36 basic term.
Roadside assistance
5 years / 60,000 mi
Towing to the nearest Chevrolet dealer, jump starts, flat-tire service, and lockout help through the powertrain period. EV towing coverage extends with the battery warranty.
EV battery & propulsion (Ultium)
8 years / 100,000 mi
High-voltage battery and electric propulsion components on Bolt, Equinox EV, Blazer EV, and Silverado EV, including a capacity-retention threshold. CARB states require 10 years/150,000 miles on qualifying models.
What the claims counter wants you to know
- Run your VIN before paying for any repair under 100,000 miles. GM special coverages and customer-satisfaction programs extend specific components well past the standard warranty, and the service advisor won't always volunteer it; ask directly for open field actions on the VIN.
- GM's corrosion split is real money: perforation (a hole) is 6/100, surface corrosion is 3/36. Photograph and report bubbling paint early, waiting until it's 'bad enough' can move you out of the window.
- Maintenance records are your armor on powertrain claims. Magnuson-Moss lets you service anywhere; what kills claims is missing oil-change documentation, especially on AFM/DFM V8s where lifter failures get scrutinized against oil history.
- Powertrain doesn't cover the electronics bolted to the engine: sensors, the throttle body, alternator, and infotainment are 3/36 items. The 36k–60k window only protects internal mechanical parts.
- Chevrolet factory coverage transfers free to later owners for the remaining term. Duramax diesel and EV component schedules differ from gas trucks; verify the exact terms for your configuration in the booklet.
Frequently asked questions
- Does the Chevy warranty transfer to a second owner?
- Yes, remaining factory coverage (basic, powertrain, rust-through, EV battery) follows the VIN automatically with no fee. GM's extended protection plans are separate contracts with their own transfer terms. Special-coverage extensions also follow the vehicle, which is why a VIN history check matters when buying used.
- Is the Chevy EV battery covered, and what about degradation?
- Bolt, Equinox EV, Blazer EV, and Silverado EV batteries are covered 8 years/100,000 miles (10/150 in CARB states), including excessive capacity loss below GM's retention threshold, not just outright failure. Normal gradual range loss is expected and not a claim. Battery packs replaced under recall typically carry fresh component coverage; ask for documentation.
- Can I service my Chevy at an independent shop?
- Yes, federal law protects you, and GM cannot require dealer service to keep the warranty. Keep dated receipts with mileage and oil spec (dexos-licensed oil matters here; GM specifies it, and using something else gives a claims reviewer an opening on engine claims).
- What does the 5/60 powertrain warranty actually cover on a Silverado?
- Internal engine parts, the transmission and transfer case, and drive axles: the lubricated mechanical core. It does not cover sensors, the water pump on most schedules, the alternator, or electronics, which are all 3/36 basic items. Duramax diesels carry separate, longer engine coverage.
- What voids a Chevrolet warranty?
- Total voiding is rare (salvage title, odometer tampering). Individual claims get denied for documented causes: no maintenance proof, damage from misuse or accidents, or modifications that caused the failure; a tuned ECU on a denied transmission claim is the classic Chevy truck story. Stock calibration and good records keep you safe.
