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  1. Technical Department
    I purchase a 1999 gmc sierra for $400 that had a bad transmission. I replaced the transmission with one that came out of a wrecked running truck. The truck shifts fine and I can manually put it in 1st-3rd but im getting a bunch of codes related to the transmission along with other codes. I have...
  2. General GM Discussions
    I have a 2004 silverado 2500 6.0 with a 4l60e trans. When I am doing 80 on the freeway, it runs at 3000 rpm. Does this sound right? The shop that had just rebuilt my trans had said that my p0300 (random misfire) code is keeping my torque converter from locking up. Does this sound right?