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  1. 04 Shifting/Power Issues - No error codes

    OEM Issues
    This is a new to me 04 trailblazer i6. Mileage is 134000 and the transmission is supposedly at 60k. Purchased it a couple of months ago and it has more or less ran fine with the exception of some of the common HVAC gremlins and it even performed great towing my 2200# popup trailer a couple hours...
  2. Shifts late from 1st to 2nd gear

    Transmission Mods
    Especially when cold, whenever my truck shifts from first to second, it needs to be above 3k rpm, which occasionally causes a hard shift. Whenever I drive I need to let of the gas and make it shift myself. My first thought was vaccuum leak or solenoids, but does anyone have any other ideas for...
  3. 4L60E no shift to 3rd beyond 2nd gear

    Transmission Mods
    My 2002 GMC Envoy 4.2 is suddenly not shifting beyond 2nd gear. I've read some threads here which state this may be a problem with a bad solenoid. Took the vehicle to a tranny specialist yesterday. Of course they want to install one of their factory rebuilt transmissions for approx $2500. I...
  4. Power Loss/Won't Shift. Need Help.

    OEM Issues
    Haven't been on here in a looong time, but I am having an issue with my 2003 TrailBlazer with the I6 engine. A couple of days ago, it seemed as if it was having some power loss while accelerating. Just to confirm, I floored it and it accelerated kind of slower than normal. The acceleration...
  5. transmittion shuttering and erratic shifting

    General
    Hello every I drive an 03 envoy picked it up for a reasonable price a few months ago I love it but it has had its issues along the way right now I am having erratic shifting and shutting problems it all started after I chaged the battery one day I put the new one in and hooked it up then I...
  6. Shift Assembly

    General
    I've gotten help here before, hoping to do so again. 2005 Chevy Trailblazer EXT 4WD 4.2L 6 cyl I have searched the forum for directions or assistance on changing the shift assembly with no luck, I was wondering if anyone could help? Preferably with pictures? I have already removed the...
  7. Indicator will not shift to park

    OEM Issues
    I am going crazy! I wan to start by saying thank you for all of your help so far. I have been referring to this site with problems I have had for a month now and have answered every question I have had. Now I have an issue that I can't find. I have a 2002 gmc envoy that blew an engine. I...
  8. Lurch and stall when shifting from R to D when cold (03 Envoy)

    OEM Issues
    Hi All ! (first post) Glad I found this place.. wife has an 03 TB, and I have an 03 Envoy. I've only had the Envoy since summer, and now that its getting colder, Im finding a possible transmission problem.. When I back out of my driveway, and then switch from Reverse to Drive, the truck will...
  9. downshifting

    TrailBlazer / Envoy Chat
    k so if i were to drive 60km/hr and then shift down into gear 2, would that be bad for my Trailblazer? P R N D 3 2 1
  10. Shift kit.

    Transmission Mods
    I just installed the following parts: 1. TRANSGO SK4L60E SHIFT KIT. 2. TRANSGO 46-PLT-96 HEAVY DUTY VALVE BODY SEPARATOR PLATE (FITS 1996-2006 ). 3. 4L60E VALVE BODY GASKETS UPPER AND LOWER. 4. (2) SONNAX UPDATED PINLESS ACCUMULATOR PISTON KITS (1-2 & 3-4). 5. SONNAX UPDATED...
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