2003 Chevrolet Trailblazer Problems

What owners report

Owners of the 2003 Trailblazer most often describe electrical problems — a speedometer, tachometer or fuel gauge that sticks, freezes or quits, and battery drain traced to corroded ABS module grounds. A second large group reports a gasoline smell and a leak where the fuel tank or filler neck meets the tank, typically noticed when parked. Complaints are spread across a wide mileage range, from under 30,000 to well past 200,000, so these are age-related as much as mileage-related.

1. 1
   Fuel system

   Gasoline smell and fuel leak at tank or filler neck

   • 172 complaints (19%)
   • median 90,000 mi at 7.3 yrs old (140 state mileage)
   • 4 mention a crash, fire or injury
   • owner-quoted repair $1,100 (median of 25 quotes)
   • filed 2002–2020

   Complaints describe a strong gasoline odor in the cabin, in the garage or under the rear of the vehicle, often followed by the check engine light. Dealers and shops typically traced it to a leak at the top of the fuel tank, the filler neck or hose connection, or corroded fuel lines, with repairs quoted from several hundred to over $1,300 for a tank replacement. Some owners say they were told the work was not covered and referenced a special coverage that had already expired. Reported from about 40,000 miles upward, with many in the 65,000-125,000 mile range and some much higher.

   3 related service bulletins

   What to check: Smell for fuel around the rear wheels and under the tank after the vehicle has sat, and look for staining or drips at the filler neck and tank seam. Ask whether the tank, filler hose or fuel lines have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Have a 2003 chevy trail blazer and the gas tank is leaking from the top. I understand that there is a TSB # 05012 out on this issue. I had recently been at my dealer to get the check engine light checked. They said that I needed to replace the compressor right away. Well that was over a year ago and it is still working just fine..that was not the problem. Seems there are a lot of us out there who have this leaking gas tank problem.”

   NHTSA complaint #10241715, filed 2008-09, 75,000 miles

   “I own a 2003 chevy Trailblazer ls model. The gas tanks leaks where the filler neck connects to the tank. This is a known issue on 2002,2003 and 2004 models. I asked GM for assistance with the tank replacement ($1400.00) because this is a well known issue with this vehicle. Request was denied because I don't have a history with GM dealerships as in previous purchases. My VIN number did not fall into the special authorization that was issued in 2007 for this issue.”

   NHTSA complaint #10290825, filed 2009-11, 81,000 miles
2. 2
   Electrical system

   Speedometer / instrument cluster gauge failure

   • 196 complaints (22%)
   • median 81,000 mi at 7.2 yrs old (174 state mileage)
   • 2 mention a crash, fire or injury
   • owner-quoted repair $525 (median of 26 quotes)
   • filed 2003–2019

   Owners describe the speedometer sticking at a high reading or freezing and then dropping to zero, sometimes together with the tachometer or fuel gauge. Some had a speed sensor replaced first without success, then were told the cluster itself needed repair or replacement. Several complaints note the repair quote ranged from a few hundred to about a thousand dollars and that the problem returned in other gauges later. Mostly reported between roughly 50,000 and 110,000 miles, though a few appear much earlier.

   1 related service bulletin

   What to check: With the engine running, watch whether the speedometer and tachometer read correctly and move smoothly; note any gauge that sticks or sits above zero when parked. Ask whether the cluster has ever been repaired or replaced.

   2 excerpts from owner complaints in NHTSA records

   “My speedometer quit working and I can no longer tell what speed I am going. This happens everytime I drive. To correct the problem will cost me around $500.00 to $700.00. My vehicle is a 2003 chevy Trailblazer with 4wd.”

   NHTSA complaint #10341998, filed 2010-07, 92,000 miles

   “3 months ago I started having problems with my speedometer. I would be sitting still and it would be reading 50 MPH. This would occur often. I took the vehicle to the garage and they replaced the speed sensor and this did not correct the problem and I was informed that I would have to take the vehicle to GM dealer because this was something they could not fix since it involved the cluster guage. Now this guage is resting any where between 100 and 120 MPH. This is a big safety issue and GM needs to address the problem. …”

   NHTSA complaint #10246740, filed 2008-10, 78,000 miles
3. 3
   Exterior lighting

   Brake lights and tail lamp bulbs failing

   • 66 complaints (7%)
   • median 61,614 mi at 5.8 yrs old (40 state mileage)
   • 3 mention a crash, fire or injury
   • filed 2003–2021

   Owners describe rear brake or tail lamps that flicker, melt the housing or stop working, including after the bulb-socket recall work was performed. Complaints say the dealer replaced the lamp assembly once or twice and then declined further no-charge repairs, citing mileage since the recall. Others report headlamp wiring that melted and burned out bulbs repeatedly. Reported across a wide range, from about 10,000 to over 60,000 miles, often years after the original repair.

   Recall 04V527000Recall 05V1980002 related service bulletins

   What to check: Have someone operate the brake and turn signals while you watch all rear lamps, and look at the bulb sockets and housings for melting or corrosion. Ask whether recall 04V527000 was completed.

   2 excerpts from owner complaints in NHTSA records

   “The problem that I have with my truck is an electric problem involving the light relays, which I ad to replace several times due to them being damaged, leaving me without lights. My main concern is that I drive at night often and I am in danger when I have the lights on and off. I did research on several forums where same-vehicle-owners have experienced the same issues.”

   NHTSA complaint #10502721, filed 2013-03, 150,000 miles

   “Front headlight burned out in november 2005 replaced light bulb. Burnt out again went to dinsdale chevy to get replaced said that the wire was melted and burned and would have to be replaced. I asked how that could happen and they said it was probably a manufacturing defect. I asked if that means they would replace it and they said no it would cost $132 to repair. I couldn't afford that so I bought the part and had to wire it myself.”

   NHTSA complaint #10156535, filed 2006-05, 45,325 miles
4. 4
   Electrical system

   ABS warning light and corroded ground connections

   • 91 complaints (10%)
   • median 72,943 mi at 6.5 yrs old (75 state mileage)
   • 8 mention a crash, fire or injury
   • owner-quoted repair $781 (median of 10 quotes)
   • filed 2002–2023

   Owners report the ABS or service-brakes message appearing in the driver information center, in some cases repeatedly after a ground connection on the frame was cleaned. One complaint describes a corroded ABS module under the frame that drained the battery overnight and damaged wiring and computer components. Others note the warning appears mainly in very cold conditions, making it hard to tell a real fault from a false one. Reported from about 60,000 miles upward, with several complaints tying it to sub-zero temperatures.

   Recall 03V1510001 related service bulletin

   What to check: Check that the ABS light comes on with the key and goes out after start, and ask whether any ABS module or ground repairs have been done. A scan for stored ABS codes is worthwhile.

   2 excerpts from owner complaints in NHTSA records

   “This is a third time the ABS warning light has come on malfunctioning saying we need service once in montana and then another incident in 2008. Service brakes, air antilock ABS warning lights come on in the drivers information center. However, it happens every time it gets 5 to 10 degrees or more below zero. The first time I took it into garage and they cleaned up the ABS ground connection on the frame. This is a safety issue because a person doesn't know if it is accurate or another false alert. …”

   NHTSA complaint #10566629, filed 2014-03, 62,500 miles

   “Heard funny noise coming from vehicle. After that the cars battery would be dead. Could recharge battery but it would be dead the next day. Took it in to a private shop where it was found that the ABS module under the frame was corroded and drawing down the battery by grounding on the frame. It also destroyed a computer and two plugs on the transmission neutral safety switch. Total repairs to vehicle totaled over $2,300.00.”

   NHTSA complaint #10230434, filed 2008-06, 61,238 miles
5. 5
   Air bags

   Air bags not deploying in a collision

   • 50 complaints (6%)
   • median 95,600 mi at 8.3 yrs old (39 state mileage)
   • 46 mention a crash, fire or injury
   • filed 2002–2017

   Several complaints describe frontal or rollover collisions in which none of the air bags deployed, in some cases after the vehicle flipped. Owners say they expected deployment at the impact speeds described and reported injuries. None of the complaints state that a dealer inspected or explained the non-deployment. Reported from near-new mileage up to about 120,000 miles, in collisions at various speeds.

   Recall 03V051000Recall 02V222000

   What to check: Check whether recalls 03V051000 and 02V222000 were completed for the driver-side air bag inflator, and confirm the air bag warning light behaves normally at start-up.

   2 excerpts from owner complaints in NHTSA records

   “I was involved in a head-on collision, I was going around 10-15 MPH and the vehicle that caused the accident was going faster than I was going. My airbags did not deploy. They should deploy between 8-14 MPH. Is anyone holding general motors accountable for their negligence? We were on a two lane city street.”

   NHTSA complaint #10969901, filed 2017-04, 195,000 miles

   “My 2003 chevy Trailblazer was hit by another vehicle that ran a stop sign and struck the drivers side. This caused the front wheel and axel to break, caused the car to loose control, and flip end over end landing upside down. None of the front or side air bags worked.”

   NHTSA complaint #10171856, filed 2006-10, 43,000 miles

Buying note. A 2003 Trailblazer is old enough that gauge cluster, fuel tank and ABS ground faults are common, so budget for a pre-purchase inspection that includes a scan tool check and a close look underneath at the tank and frame grounds. Confirm which open recalls have been done and ask for receipts for any fuel tank or cluster work.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.