2004 Chevrolet Trailblazer Ext 370 problems, complaints & recalls
Most-reported problem areas: Fuel/Propulsion System (3) · Electrical System (3) · Fuel System, Gasoline (2)
🧭 Reliability snapshot
Compared against other Chevrolet Trailblazer Ext 370 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (82)
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 82 bulletins. Search all of them free at nhtsa.gov.
What owners report
2016-04-06 · Fuel/Propulsion System · 120,000 mi“filler neck to gas tank leaking....dangerous !! causes the check engine light to stay on....…”
2016-01-19 · Fuel/Propulsion System · 92,000 mi“received a letter from gm regarding potential problem with fuel tank inlet valve. took vehicle to dealer len stoler, inc in westminster md in december. problem was diagnosed as a fuel tank inlet valve fracture. on dec 3rd 2015 fuel tank was replaced and inspection done. subsequent to service when fuel was placed in vehicle gas poured out on pavemen…”
2015-06-17 · Fuel/Propulsion System · 115,869 mi“tl* the contact owns a 2004 chevrolet trailblazer ext 370. while in a parking lot, the vehicle stalled without warning. the vehicle was towed to an independent dealer. the technician diagnosed that the fuel pump and fuel filter needed to be replaced the filler inlet was also cracked. the contact mentioned that the fuel pump, the fuel filter, and th…”
2015-01-03 · Air Bags · 150,000 mi · 💥 crash“my son [xxx] was involved in a single car accident (hit a deer and ran off the road) in which our 2004 chevy trailblazer was totaled in a roll over and not one single airbag deployed in the accident. as a result of no airbag he smashed his forehead into the steering wheel leaving a 2 inch gash, cut to the bone. information redacted pursuant t…”
2014-12-20 · Exterior Lighting · 92,500 mi“nhtsa recently posted a recall of the 2006-2009 chevy trailblazer for headlight issues due to a headlamp driver module (hdm) that is not operating correctly and can cause the low beam headlamps and daytime running lights to shut off. i have a 2004 chevy trailblazer ext 370 and have the same issue and it has been ongoing for several years. it h…”
2014-11-05 · Electrical System · 100,000 mi“i parked the car in my driveway and the passenger side mirror started clicking. the mirror was attempting to rotate to the extreme car side of the mirror. using the remote mirror control had no effect.the car was turned off and the mirror motor continued to try to move the mirror past the limit. after several minutes, the clicking stopped and there…”
2014-05-26 · Service Brakes“i am extremely disappointment and afraid of my trailblazer at this point. we purchased the vehicle used and within a week of having the truck it started dying at redlights. out of nowhere the truck just shuts off in the middle of the road. it has got to the point now that it does it while the vehicle is actually in motion. i have 3 kids and this is…”
2013-10-07 · Electrical System · 50,000 mi“speedometer fails to register correct speed. inoperable speedometer stuck at zero when moving or sometimes at other displayed speeds while stopped. *tr…”
2012-06-06 · Visibility:sun/Moon Roof Assembly · 111,000 mi“on about 6 occasions over the past couple weeks my sunroof has opened by itself. on each occasion it has happened after backing up and then putting it in drive. when it happens i try to stop it by pressing the close button but it doesn't do anything and continues to open fully and stops. after about 20-30 seconds i can close it. *tr…”
2012-02-13 · Electrical System · 40,000 mi“switches for the power window and heated driver's seat on driver's door panel stopped working. heater for driver's seat turns on, on its own and cannot be controlled with the switch. while the heater for driver's seat is on, the instrument panel flickers. the heater for driver's seat turns on and off, on its own and each time it comes on, the in…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.