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2021 GMC Sierra 1500 Engine And Engine Cooling Problems

NHTSA component category: ENGINE AND ENGINE COOLING · data through 07/14/2026

42Engine And Engine Cooling complaints
8.2%Of all 515 complaints
#4Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine and engine cooling ranks on this vehicle

ENGINE267 · 51.8%
POWER TRAIN126 · 24.5%
ELECTRICAL SYSTEM67 · 13%
ENGINE AND ENGINE COOLING42 · 8.2%
Unspecified / other40 · 7.8%

Share of the 515 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 GMC Sierra 1500 overview page.

Engine And Engine Cooling complaints by year filed

1202434202572026

Frequently asked questions

Does the 2021 GMC Sierra 1500 have engine and engine cooling problems?

Engine And Engine Cooling is the #4 most-reported problem area on the 2021 GMC Sierra 1500: 42 of 515 complaints on file (8.2%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2021 GMC Sierra 1500 have in total?

515 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 5 involved a crash, 6 involved a fire, 2 reported injuries, and none reported deaths.

What does NHTSA's engine and engine cooling category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE AND ENGINE COOLING category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/14/2026.