2021 Chevrolet Suburban Engine Problems

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

75Engine complaints

42.1%Of all 178 complaints

#1Most-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

ENGINE75 · 42.1%

POWER TRAIN34 · 19.1%

FUEL/PROPULSION SYSTEM21 · 11.8%

ELECTRICAL SYSTEM16 · 9%

Unspecified / other13 · 7.3%

Share of the 178 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 Chevrolet Suburban overview page.

What owners report

“I was driving when I received messages saying service ESC, Forward collision System Unavailable, & Service Traction Control. The vehicle began to shake hard when…”NHTSA complaint 11684390 — filed 09/02/2025

“My suburban is 4 years old and needs a new engine. The dealership is seeing a lot of 21's with the same issue. Bank 1…”NHTSA complaint 11680583 — filed 08/14/2025

“Was driving about 45 mph on 2 lane road. All of a sudden, without warning we lost power (had no propulsion). Luckily there was a…”NHTSA complaint 11679338 — filed 08/08/2025

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

Engine complaints by year filed

Frequently asked questions

Does the 2021 Chevrolet Suburban have engine problems?

Engine is the most-reported problem area on the 2021 Chevrolet Suburban: 75 of 178 complaints on file (42.1%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2021 Chevrolet Suburban have in total?

178 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 6 involved a crash, 1 involved a fire, 5 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 07/14/2026.