2021 GMC Acadia Engine Problems

NHTSA component category: ENGINE · data through 07/12/2026

29Engine complaints

20.1%Of all 144 complaints

#2Most-reported category

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

How engine ranks on this vehicle

ELECTRICAL SYSTEM36 · 25%

ENGINE29 · 20.1%

FUEL/PROPULSION SYSTEM22 · 15.3%

Unspecified / other20 · 13.9%

SERVICE BRAKES17 · 11.8%

Share of the 144 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 GMC Acadia overview page.

What owners report

“I have a 2021 GMC Acadia that keeps saying steering assist not available. But when it does this, the temperature gage stops working and so…”NHTSA complaint 11688739 — filed 09/21/2025

“This is a well known issue. On the dash it keeps reading steering system is being reduced drive with care. I have been dealing with…”NHTSA complaint 11685299 — filed 09/05/2025

“The contact owns a 2021 GMC Acadia. The contact stated that after a routine maintenance at the local dealer, it was noticed that the radiator…”NHTSA complaint 11663643 — filed 05/29/2025

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine complaints by year filed

Frequently asked questions

Does the 2021 GMC Acadia have engine problems?

Engine is the #2 most-reported problem area on the 2021 GMC Acadia: 29 of 144 complaints on file (20.1%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2021 GMC Acadia have in total?

144 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 6 involved a crash, 0 involved a fire, 3 reported injuries, and none reported deaths.

What does NHTSA's engine category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE 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 07/12/2026.