One by one things have been going out and not working. First the car would not start all the time with the key, then the A/C stoped working, next was the fuel pump, then the injectors. I checked everything it could be. I was driving with my kids down the highway when my car just died lost power steering so it was hard to get off the road fast. I got it started and was driving and it did it again. I was able to finally get it home when it would not start again. After some research online found out this car has issues with the fuse box itself under the hood. I opened it up just to find the wording that connected the pins was broken in numerous places and had started to burn up in the box.
2003 Chevrolet Trailblazer EXT electrical problems
77 complaints (25% of all complaints for this car). Typical mileage when it fails: 83,450. 2 crashes reported.
- owner complaints
- 77
- of this car's complaints
- 25%
- typical mileage
- 83,450
- crashes
- 2
- recalls
- 0
Which part fails
- Instrument cluster/panel22
- Ignition2
- Starter assembly1
- Ignition: switch1
- 12v/24v/48v battery1
At what mileage
Complaints by mileage at the time of the problem.
0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+
Chevrolet Trailblazer EXT electrical problems in other years
Specific symptoms reported on the 2003 Chevrolet Trailblazer EXT electrical
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
What 2003 Chevrolet Trailblazer EXT owners say
Most recent owner complaints, unedited.
When driving for 30 to 45 mins all the instruments on dash start sticking and reading wrong information. In the picture my car is parked .
Speedometer is erratic often showing false speed or goes to zero.all moving speeds highway or streets.
The electronic throttle module to PCM communication error comes up and the vehicle starts the warm up process and then dies in the process of warm up procedures. I guess my question to you is how can I fix this or does a deal need to fix it or is there a recall on this issue?
My key will not come out of the ignition I had to unscrew and remove the bottom of my steering to push the button also all of my instrument gauge do not work including the speedometer and all gauges so I never know my temperature or fuel level, oil pressure they all are not working properly my speedometer only works sometimes. Also my engine is runny rough and I hear a vibration and ticking. My check engine light is and I'm getting code saying theres a leak in the fuel evap system. I have searched the internet and everyone has the same problems with their 2003 trailblazers. Why isn't chevrolet recalling these problems its fustrating they want several hundreds of dollars I cannot afford
Low beams intermently go off and on ! Exhaust manifold is cracked causing a leak ! All dash gauges but fuel gauge dont work !
None of my gages work and a lot of my dash lights are on. I have no idea how much gas I have. My speedometer and RPM gages work but nothing else does. This has been happening on and off for about 3 months but they would always go back on. But now it has been off for a week without going back to normal. Twice last week the radio and the power windows stopped working as well. This happens while driving parked all the time and it doesnt go back to normal. I have seen a lot of complaints about this so I have no clue why there isn't a recall. It is not safe to drive my trailblazer until these things are fixed. I work at a chevrolet dealership and they couldn't figure out how to fix this either. Gm needs to put out a recall to get this fixed asap.
The gas gauge started messing up/not reading right especially in the rain and then shortly after that the speedometer started doing the same thing. Now neither one will work at all. This started about two years ago and quit working all together about 1 year ago. I heard that this is happening to alot of trailblazers. This started while the vehicle was in motion.
The check engine light went on and there was a strong gas odor. Gas had also previously spilled out when fuelung.
First oil pressure gauge went and now my speedometer is also gone stuck at 50 MPH. Called chevy can't get straight answer from them and ask what other vehicles with the same problem with gauge cluster advised can't disclosed any information.
Questions about the 2003 Chevrolet Trailblazer EXT electrical
Does the 2003 Chevrolet Trailblazer EXT have electrical problems?
Owners have filed 77 complaints about the electrical of the 2003 Chevrolet Trailblazer EXT, 25% of all its complaints.
At what mileage do 2003 Chevrolet Trailblazer EXT electrical problems start?
The typical (median) mileage in owner complaints is 83,450 miles.
Was there a recall on the 2003 Chevrolet Trailblazer EXT electrical?
There is no recall for this problem on this model year.
What year does the Chevrolet Trailblazer EXT have the most electrical problems?
The Chevrolet Trailblazer EXT model years with the most electrical complaints are 2004 (145 complaints), 2003 (77 complaints) and 2006 (41 complaints).
Other 2003 Chevrolet Trailblazer EXT problems
Fuel system 89Transmission 49Visibility 26Lights 23Body 20Engine 18Brakes 13Locks 13Suspension 12Acceleration 7Steering 6Airbags 5Seats 5Seat belts 3Tires 1Wheels 1
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