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  1. 02-09 Vortec 5.3L V8 Engine and Drivetrain
    I'm working on a 03 trailblazer with the 5.3. drove great last night and earlier today but then popped the cel and wouldn't shift. Ran a scan and showed the p0640 p0785 and p1860 checked the 47 and 50 fuses, no power. But something told me to reverse it and they are grounded. Anyone know what...
  2. Transmission Mods
    I just bought a 04 trailblazer 4X4 with almost 200,000 miles. All other gears are working fine,just no 1st gear. I just replaced the 2 shift solenoids so i know that is not the problem. When I did replace the solenoids 1 of the popped off on its own, the other did not. I had to pry it off. I...
  3. 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. OEM Issues
    I have 04 Trailblazer EXT 4.2L VIN S 8TH DIGIT, that i did an engine swap after blowing the original. :sadcry: The engine was from an 03 but everything went fine and the truck drove fine for over 2 month (at least 400). i started having a problem with it not shifting gears without the engine RPM...
  5. OEM Issues
    Hello all. I have an 04 Trailblazer EXT, V6, with approx 120K miles. I have recently put about $3000 dollars back into this vehicle after 2 years of abuse by my soon to be ex-wife. This includes brakes all the way around, including calipers, tires, headlights, cleaning, oil change, etc. I had...
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