2002-2009 Chevrolet Trailblazer Fuses | GMC Envoy Fuses

41 Comments

1. The drivers side door panel the window or door lock controls will not work so were do I need to look first to see what’s wrong

2. Bad flasher module more than likely.

3. I am trying to add an FM modulator to my envoy. I can’t find anywhere to connect to a 12v switched power source. Everything I test is I switched. Help?

4. Check the fuel pressure regulator vacuum hose to see if its wet with fuel or has the odor of fuel.If either condition is present, the fpr is bad.You should also check the regulator itself to see if fuel is steadily seeping out of the regulator vacuum port,with the vacuum hose disconnected from it while a assistant turns/cranks the engine with the key.The fpr is bad if fuel is coming out of that port.If the fpr is ok, check for a stuck open injector.If theres so much fuel getting dumped into the engine that raw fuel is making its way out of the tailpipes,its gonna flood the engine and prevent it from starting.When this condition occurs,use the following (clear flooded engine mode) procedure to see if the engine will start.
   *Hold the gas pedal to the floor while you crank the engine.This will trigger the ecu to shut injector pulse off and that,plus the throttle blade being fully open,will allow additional air to enter the engine to help clear out the excess fuel & that should allow the engine to start.If your vehicle has a carbon canister,purge valve & vent valve for the EVAP system and the vent valve (on top of the fuel tank) is defective,allowing liquid fuel to be drawn into the canister then the engine,this will also cause an engine flood condition.A bad ect sensor can cause so much of a rich condition that the engine wont start.Press the gas pedal down 1/4-1/3 of the way during crank mode and if it starts,the ect sensor is bad.

5. Got 06 trailblazer I cranked it had ac on rolled up driver window and vehicle went dead and now will not start
   I have all dashlights work but not starter and now windows and doors locks don’t work either
   Has plenty power just won’t turn over

   Any suggestions

6. I just got a 2008 trail blazer can some one tell me where are the fuses for cig lighters onl y 1 is working in front and none in the back . And why my stability track lights keep coming on the one for service and one saying it’s not properly working. Had it to shop and said it was fine. Thanks so much

7. I just got a 2008 trail blazer can some one tell me where are the fuses for cig lighters onl y 1 is working in front and none in the back . And why my stability track lights keep coming on the one for service and one saying it’s not properly working. Had it to shop and said it was fine. Thanks so much

8. Can anyone help me locate the fuse (#) that controls the a/c compressor? I just installed a high output 2-speed electric fan on my 2004 Trailblazer LS 4.2L after replacing my water pump and removed fan and shroud.
   The relay I’m using to control the low and high speeds needs to kick into high speed when I turn the a/c on, otherwise the low speed is running once operating temp reached. I have blade fuse attachments connected to fuse #30 for the a/c.
   Is there a better option?
   Thanks

9. Can anyone tell me where the interior lights fuse is located and what it looks like

10. On my 2004 Chevy trailblazer ext Lt is it ok to run it with out soild state relay 44-fan?

11. Fuse # for running lights?

12. There’s no light to see how fast I’m going? Is that a blown fuse??

13. Where would the key fob in the fuse boxes

14. How is the gauge fuse listed in the fuse box

15. My key fob won’t unlock or lock my 06 Chevy Trailblazer?? Any ideas I changed the battery and it still won’t work

16. My third brake light doesn’t work. Was told to check fuse first before replacing whole thing. Which fuse/fuses do I need to check?

17. My heater control panel does not have any display so my heat doesn’t work.

18. My 03 trailblazer 2 wheel drive it I just put a motor in and it cranks won’t start . Only starts if u spray the air box . And also I have gas dripping out of my muffler ? I’ve checked wires grounds fuses I’m out of ideas any help work help and I’ve changed crank sensor cam sensor . My thoughts are bad ground s which I’ve checked and I’ve added a ground any help would help !!

19. I had a new ignition switch put in my 2002 trailblazer and ever since, my keyless entry/auto starter won’t work, and if I lock the car from the door, everytime I unlock it, the car alarm goes off. From what I’ve read, I probably need to reset the alarm system, but I cannot find out which fuse works the alarm system. Please help. This is driving me and my neighbors crazy!

20. I have a 2003 Chevy Trailblazer and I took it into a shop and got it diagnosed but they couldn’t find anything. My trailblazer will shut off while driving and gauges would go all over. It would turn right back on after a few minutes. My question is, would it be a fuse and which one should I check?

21. First check the fuse. If the fuse is in good condition the issue is either the headlight switch or a broken wire to the headlight assembly. If you are good with a multimeter you can test both these components.

22. my headlight do not work, I have changed them twice. any advise on what I need to do to get them to work 2007 chevy trailblazer ls

23. my headlight do not work, I have changed them twice. any advise on what I need to do to get them to work 2007 chevy trailblazer ls

24. I have a 2003 GMC envoy an none of my gauges work on my Dash it’s saying that it’s an unknown driver none of my windows or my locks my Clicker when I take out one of the fuses everything works but I can’t start my car and as soon as I put it back in it stops working

25. All my dash lights are out in the instrument cluster.

26. I think I need to replace the fuse for the power seat in my 2008 Chevy Trailblazer. Can someone please tell me what kind of fuse it is I need? It’s not one of the mini fuses from what I’ve been told and that’s all that comes up for part replacements. I was told it’s one of the bigger silver fuses.

27. Had the same problem, problem was with the wiring harness to the blower motor. The plug connection had melted and destroyed the contacts. solution was to replace the wiring harness and plug. very common problem in trailblazer.

    https://www.youtube.com/watch?v=M4pka5BMoQE

28. which fuse is for the backlight of the license plate for a 2005 trailblazer

29. Here’s a good one for you. We went to the dealer for an oil change today, started the car and turned the A/C on….worked for 5 seconds then stopped. I’ve checked Engine fuses: #35 along with J-case #44 and both seem fine. I’ve checked Interior fuses: #36, #39, & #44 along with J-Case: #35 & #44, all of these seem fine. When I turn the dial to anywhere from off to 5 and I can feel the A/C start but nothing coming out of the dash.

30. Bad flasher bleeding over

31. Same thing happened to mine Eric. The rained slips thru the creases in between buttons on your master control window switch. Your going to have to replace eventually, but in the meantime you can switch your passenger side window control lock to your driver side. Found this video on youtube. Good Luck.
    https://www.youtube.com/watch?v=RBNCyioHsR8

32. we replaced the DDM and the power windows still don’t work. This has been an issue since we replaced the battery.

33. When I turn my left signal on the hazards go on and the right signal works when it wants to. What fuses should I look at?

34. Okay…rained hard in my driver window last night…this morning, none of the controls work on driver door, including mirror. Passenger works. I pulled the 25 relay under the seat and swapped it, still nothing…is there another fuse I’m missing somewhere?

35. trying to find the replacement interior fuse for #8 seats

36. Front heater control cluster stopped working, ideas?

37. Check fuse 41 in the rear fuse box.

38. Whats the key name for my car radio fuse on a 2002 chevy trailblazer

39. You are the “man” thanks for this information

40. Thanks very much

41. This has been very helpful. Thanks for putting this together.