2003 Chevrolet Trailblazer EXT Power Train:automatic Transmission Problems
NHTSA component category: POWER TRAIN:AUTOMATIC TRANSMISSION · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train:automatic transmission ranks on this vehicle
Share of the 313 complaints citing each category; one complaint can cite several. Full breakdown on the 2003 Chevrolet Trailblazer EXT overview page.
What owners report
“THE AUTOMOBILE STARTS OUT IN 2ND GEAR AND AT HIGHWAY SPEED THE TRANSMISSION HUNTS FOR THE CORRECT GEAR SHIFTING BACK AND FORTH.”NHTSA complaint 10193005 — filed 06/12/2007
“WHILE DRIVING ACROSS THE WILLIAMSBURG BRIDGE I SUDDENLY LOST THE ABILITY TO ACCELERATE. THE RPM GAUGE SHOT TO THE HIGH END AND I HAD TO…”NHTSA complaint 10177311 — filed 12/29/2006
“WE HAVE A 2003 CHEVY TRAILBLAZER AND HAVE HAD NOTHING BUT PROBLEMS WITH IT SINCE WE BOUGHT IT BRAND-NEW. IT WAS BACK IN THE SHOP…”NHTSA complaint 10173095 — filed 11/09/2006
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train:automatic Transmission complaints by year filed
Frequently asked questions
Does the 2003 Chevrolet Trailblazer EXT have power train:automatic transmission problems?
Power Train:automatic Transmission is the #3 most-reported problem area on the 2003 Chevrolet Trailblazer EXT: 29 of 313 complaints on file (9.3%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2003 Chevrolet Trailblazer EXT have in total?
313 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 7 involved a crash, 6 involved a fire, 11 reported injuries, and none reported deaths.
What does NHTSA's power train:automatic transmission category include?
NHTSA assigns each complaint to standard component categories; this page reports the POWER TRAIN:AUTOMATIC TRANSMISSION category exactly as NHTSA defines and records it.
