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  1. Changing misfire code - 0305 then 0301 on '03 EXT LT 4.2

    OEM Issues
    Hi everybody, I need some help asap. My battery went out last January in a remote place and I had Walmart replace it. The genius over-tightened the positive terminal and it loosened over time(stripped threads) allowing corrosion to set in. A couple days ago, the terminal finally went...
  2. [SOLVED] Rough idle after spark plug change

    OEM Issues
    Hi everybody! This is my first post, so I hope I threw this in the right place. So I know there are already plenty of threads regarding this sort of thing... I changed my spark plugs, I used AC Delco 41-103 plugs, I made sure they were all gapped around .042, I used dielectric grease, I made...
  3. Idle Problem, Please Help!

    The 02-09 "How-To" and DIY Section
    Hello... I have an 04 GMC Envoy SLT. Its an I6 and just had the transmission rebuilt. It has around 116K miles, and the plugs were changed less than a year ago as well as a professional fuel system cleaning. They cleaned the coil packs but did not change any out. About 6 months ago, well...
  4. Change plugs & wires when doing headers?

    Exhaust Mods
    I'm at 60k miles right now and I plan to install Stainless Works Headers and true duals this fall. I watched this video on youtube because I'm seeing how difficult it's going to be to install the headers. In the video they mentioned installing...
  5. What else could it be...?

    Engine Tunes/Mods
    I have a 2002 TB LT EXT with 155000 miles on it. The engine idles low, is very rough, and if I just barely touch the accelerator the engine stalls or at least hesitates when parked. It will also stall on its own when stopped at a light. Having the AC on seems to make it worse, but it will...
  6. Misfire Since the Dealer Changed My Plugs

    OEM Issues
    Hi everyone! Just joined Trailvoy yesterday - I'm loving the site. Got an '04 TB EXT with a 5.3L, about 140K km (87K mi). I didn't have time to change the plugs so I sent it to the dealer with plugs I bought (maybe that ticked them off) a set of Champion platinums. Got it back, they said I...