2021 Chevrolet Trailblazer Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/12/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 181 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 Chevrolet Trailblazer overview page.
What owners report
“Receiving "Shift to Park" alert when vehicle is already in Park.”NHTSA complaint 11626516 — filed 11/20/2024
“The contact owns a 2021 Chevrolet Trail Blazer. The contact stated that after shifting to the park position the message "Shift to Park" was erroneously…”NHTSA complaint 11625533 — filed 11/15/2024
“The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while the gear shifter was in the park(P), the message âShift to Parkâ was…”NHTSA complaint 11624902 — filed 11/13/2024
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2021 Chevrolet Trailblazer have transmission & power train problems?
Power Train is the #3 most-reported problem area on the 2021 Chevrolet Trailblazer: 35 of 181 complaints on file (19.3%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2021 Chevrolet Trailblazer have in total?
181 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 7 involved a crash, 3 involved a fire, 5 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
