2020 Chevrolet Blazer Engine Problems

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

68Engine complaints

32.2%Of all 211 complaints

#3Most-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 SYSTEM71 · 33.6%

POWER TRAIN70 · 33.2%

ENGINE68 · 32.2%

Unspecified / other54 · 25.6%

STEERING40 · 19%

Share of the 211 complaints citing each category; one complaint can cite several. Full breakdown on the 2020 Chevrolet Blazer overview page.

What owners report

“Engine fan stuck on high, air conditioner does not work, temperature gauge stuck on cold, driving assist warning light on.”NHTSA complaint 11655685 — filed 04/20/2025

“I have had to replace the radiator 3 times since I've owned this vehicle. I see where there are others with the same issue. Now…”NHTSA complaint 11655633 — filed 04/19/2025

“Chronic code P0128, causes cooling fans to go on high, AC doesn't work and steering assist reduced. GM calls for the thermostat to be replaced…”NHTSA complaint 11648616 — filed 03/16/2025

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

Engine complaints by year filed

Frequently asked questions

Does the 2020 Chevrolet Blazer have engine problems?

Engine is the #3 most-reported problem area on the 2020 Chevrolet Blazer: 68 of 211 complaints on file (32.2%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2020 Chevrolet Blazer have in total?

211 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 5 involved a crash, 0 involved a fire, 7 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.