Print this page Notes: Carrying the not-so-proud traditions of its 2002 predecessor, the 2003 has a handful of instrument panel malfunctions that can leave you guessing your speed, engine temperature or how much gas is left in the tank.


pretty bad
Typical Repair Cost:
Average Mileage:
75,600 miles
Total Complaints:
5 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replace cracked gas tank filler valve (2 reports)
  3. replaced module (1 reports)
2003 Chevrolet Trailblazer fuel system problems

fuel system problem

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2003 Chevrolet Trailblazer Owner Comments

problem #5

Jul 302014

Trailblazer LT V8

  • Manual transmission
  • 78,000 miles


I have a fully loaded 2003 chevy trailblazer ext lt. All the bells and whistles. All of which are falling apart. Bought it brand new from the dealership 10/03. Have had nothing but problems. Now I only have 78000 miles on it and was getting a very strong gas smell (knew it bc unfortunately I also own a colbalt!). I called chevy direct and was given a case number to give to the dealership to discuss assistance with the repair. Dealership didn't want anything to do with the "case number". Said the car is just out of coverage for this problem. Should have been a recall, not a "we'll only fix it if it's broke". I have had six Chevys. Will not have a seventh.

- , Brick, NJ, USA

problem #4

Nov 012008

Trailblazer EXT 4.2L

  • Automatic transmission
  • 80,000 miles

I found (through gas spilling out of the back of my blazer) a crack in the gas cap entry to the tank. Covered under a 10 yr 100K warranty. TSB-07799A is the policy number.

Any chevy dealer will fix this if it's the problem.

- , Chattanooga, TN, USA

problem #3

Feb 012009


  • Automatic transmission
  • 72,000 miles

i am having the same problem as of both. starts rough, smell of gas is strong inside/outside of vehicle.. i have been searching many different site and have found some different answers, but i just need verification on what it might possibly.

1. the gas cap is of course cross threaded. - checked this it is fine

2. also in norther states where there is snow their has been a couple of complaints of rust on the gas tank, and also on the gas tank neck.

  • have not checked that yet..

    3. i have also seen a report from GM of a hole or rust at the ICV ( inlet check valve)

    here is the link to that.. scroll down..

    this is all that i have found at this moment.. if anyone has any answer's to what is wrong please notify me.

- , Edison, OH, USA

problem #2

Jan 132009

Trailblazer LT 4.2L

  • Automatic transmission
  • 88,000 miles

Poor fuel mileage, gassey smell, and turns over strong but takes several seconds to start.

- , Prairie Du Chien, WI, USA

problem #1

Dec 072007

Trailblazer EXT L6

  • Automatic transmission
  • 60,000 miles

I noticed a strong fuel smell after driving the vehicle. Dealer diagnosed the fuel

pump module had corroded and is leaking. This car currently has a pending investigation with the NHTSA (EA 07-009). I mentioned this to the dealership and GM and have gotten no assistance with this $900 repair.

- , Scotia, NY, USA

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