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  1. 02-09 General Tech Q&A
    Does anyone know where the fuel pump would be located from INSIDE the vehicle on a '07 Trailblazer? And yes I'm very much aware that there's not a factory access.I just followed a set of instructions from another forum and cut a hole in the wrong location (under the driver side back seat). I...
  2. General
    Have been having some ongoing issues with my '08 Envoy for a couple of months. Have done a bunch of maintenance which hasn't fixed the problem (but that really needed doing anyway). Have a new theory but just wanted to run it past some other TrailVoy folks to see if I might be on the right...
  3. The 02-09 "How-To" and DIY Section
    Hi! I have a 2005 GMC Envoy, SLT Elite 4x4 4200 series engine with 200,000 miles. I just bought my wife this vehicle a week ago. Drove fine for 4 days. Did the general inspection before I purchased it. I checked the oil stick first before doing an oil change. Was not...
  4. The 02-09 "How-To" and DIY Section
    Hi! I have a 2005 GMC Envoy, SLT Elite 4x4 4200 series engine with 200,000 miles. I just bought my wife this vehicle a week ago. Drove fine for 4 days. Did the general inspection before I purchased it. I checked the oil stick first before doing an oil change. Was not...
  5. OEM Issues
    Hi all and Merry Xmas, just got a 2002 trailblazer 4.2 4 months ago i was driving 2 days ago and the engine just turned off all electrical works, the dashboard and all, but truck don't crank, so i checked my fuses and fuse 28 ( PCM1 ) was blown i replaced it, the truck cranked, turned on for...
  6. Engine Tunes/Mods
    DELETED Thread moved to OEM section
  7. The 02-09 "How-To" and DIY Section
    I've been waiting for the weather to break here in Indiana before replacing the fuel pump. I pushed a little too far the other day and ran out of gas. I put some in, and it still refused to start. After a few minutes of trying to start, something weird happened. The chimes stopped working, it...
  8. OEM Issues
    Hey there, I have been putting some serious blood, sweat, and tears, (and money ), yet I am still having the same or similar issues happening. Recent repairs: Fan clutch and water pump installed Tension pulley replaced. camshaft position sensor replaced. both oxygen sensors cleaned Throttle...
  9. General
    My 2004 Envoy would not start yesterday and realized the fuel pump was not running at start-up. After pulling the fuel pump, I realized there was a melted wire inside fuel pump module. It was the 2 wire connection that attaches to the fuel pump itself to the top inside part of the module. Fuel...
  10. OEM Issues
    Hello Trailvoy, So the other day my son was installing his subwoofers into his 2004 Trailblazer LS EXT. For some unknown reason, he drilled to close to the main set of wires traveling under the steering column. He immediately ran inside to tell me and as I looked closer, I noticed he had only...
  11. OEM Issues
    I need to replace my Fuel Pump Assembly (05 XUV) as the gauge sending unit finally failed, and I am outside the extended warranty. I read up on the sticky notes for the procedure and ordered BOSCH #67508 from Rockauto. Unit arrived with no filter screen, and instructions that "A new filter...
  12. General
    2005 Trailblazer 4.2L I6: Recently purchased this vehicle and had a new fuel pump installed since the fuel gauge was not working. Immediately afterwards, I was getting the P0455 code. Tried the new gas cap, then had them check their connections again, but still getting the code. Rather than...
  13. General
    I just had my fuel pump replaced (80,000 miles). Just a shout out! You will probably need to replace all the fuel lines. The plastic clips that hold the fuel lines in place degrade over timeand they become difficult to remove.
  14. General
    Ok. So this is my problem with my Envoy. Every so often in the past 3-6 months I have had people say that they can smell gas when the ride in the vehicle, and one said it while walking past the vehicle. I have not had any Leaks on the ground as far as I can tell. I did notice the other day...
  15. OEM Issues
    Had trouble starting my trailblazer, I replaced the fuel filter and pump, checked the relays. For some reason the fuel pump is not kicking on, checked all the connectors and they are fine just not getting power. The relay however is getting power. its not the pump because the main power...
  16. General
    :bonk:I tuned up my TB this past weekend 165,000 miles on it. I drove from TN to Illinois yesterday and it did fine, even got about 24 MPG. Ran great, no trrouble what so ever. I got up this morning, started right up. I went back in the hotel, came out to start it to go somewhere, it started...
  17. General
    :bonk:I tuned up my TB this past weekend 165,000 miles on it. I drove from TN to Illinois yesterday and it did fine, even got about 24 MPG. Ran great, no trrouble what so ever. I got up this morning, started right up. I went back in the hotel, came out to start it to go somewhere, it started...
  18. General
    Okay so i got my 2002 Trailblazer LS 2WD engine in. and it turns out my fuel pump went because it sat for so long. I guess there are 2 different fuel pumps and they correspond with wheel base size and i dont know which one i need, any help appreciated thanks
  19. General
    Hi everyone, I have a 2003 Envoy that is experiencing some serious starting issues. Sometimes it starts, and sometimes it won't. When it doesn't start, it won't even crank or attempt to turn over. All of the lights and electrical systems seem to be working, so it doesn't seem like a battery...
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