2004 Chevrolet Trailblazer Ext problems, complaints & recalls
Most-reported problem areas: Electrical System (76) · Electrical System: Instrument Cluster/Panel (47) · Fuel System, Gasoline (24)
🧭 Reliability snapshot
Compared against other Chevrolet Trailblazer Ext model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
215 NHTSA complaints that reported an odometer reading.
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (126)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2025-07-18 · PIP5601C · Service Bulletin/Repair Instructions
this pi communicates the requirement to provide a pico file to receive diagnostic assistance from tac.
Unknown Or Other 2024-09-06 · PIT3271P · Service Bulletin/Repair Instructions
this preliminary information communication provides information to the technician about changing the tire and wheel size on vehicles. general motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. technician s
Electrical System 2024-08-26 · General Communication · Service Campaign
vehicle wide programming (vwp) is a new process to update software on gm vehicles. it provides the ability via a single selection within techline connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). the updating of modules is com
Power Train 2024-07-24 · 24-NA-141 · Service Bulletin/Repair Instructions
gm is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. the damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. this bulletin advises the dealers to be more careful not to damage the transmissions durin
Fuel/Propulsion System 2024-06-28 · 16-NA-383 · Service Bulletin/Repair Instructions
this service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, crank no start, extended crank or misfire, mil with dtcs, and explains how top tier fuels should be used to reduce carbon build-up.
Unknown Or Other 2024-06-17 · 18-NA-099 · Service Bulletin/Repair Instructions
this bulletin provides information for use on a product assistance claim (pac), which is formerly known as a product allegation resolution (par) claim.
Showing the 6 most recent of 126 bulletins. Search all of them free at nhtsa.gov.
What owners report
2019-04-17 · Air Bags · 197,000 mi · 💥 crash“"takata recall" i was recently in a car accident that was listed in the police report as a head on collision and not one airbag deployed. the impact as i was told was hard enough that the airbags should have deployed.…”
2019-02-11 · Fuel/Propulsion System · 171,000 mi“rusted fuel lines- garage checked strong fuel smell and discovered rusted fuel filler and lines…”
2019-01-06 · Structure:body“part # 19120564 rubs on tailgate when opening . does secure properly. eventually, flew off while driving. …”
2018-02-22 · Exterior Lighting · 40,000 mi“when driving the headlights all of a sudden just shut off. it is extremely scary at night. i found that i can however use the brights. they eventually come back on. this has been happening for years. i kept hoping for a recall and just found this site to report it. this has happen on city streets and highways. it has happened when there are street …”
2018-01-18 · Structure:body · 105,000 mi“my family was driving home on the freeway when the complete third taillight cover blew off. it appears that the adhesive that attaches the rear spoiler to the glass of lift gate has loosened due to a manufacturer defect.…”
2017-12-23 · Electrical System · 157,000 mi“instrumental panel/ gage cluster. all gages continue to fail spiking all over the place prior to failing. air bag light continues to blink on then off randomly…”
2017-11-03 · Unknown Or Other · 12,000 mi“stalls - i have taken this trailblazer into the dealer for this stalling problem and i am told no problem found. vehicle stalls after coming to a stop or when moving slowly. this is an intermittent.…”
2017-07-30 · Electrical System“fuel gauge not working alone with all the other gauges and turning signal not working…”
2017-06-24 · Engine · 162,525 mi“vehicle's reduced engine power light comes on, and vehicle loses power in dangerous places. lost of problems consist of several parts having to do with acceleration. this problem happened suddenly, andnis a danger to himan safety because of it happening several times including o n the highway.…”
2017-02-17 · Power Train · 136,000 mi“automatic transmission slips when it tries to shift into 3rd or 4th gear, i read that there was a report on this happening but there was not a recall as far as i know, i recently purchased this vehicle from the original owner who says they never received any paper work from gm about doing repairs. my question is will gm repair this condition at no…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.