TStowell
Newbie
Hi so ive got a 1996 C1500 with a L31 and 4L60E and suddenly while driving i lost power I could feel it was something wrong with the torque converter because in park i revved great no bogging. In drive it normally only drops down to around 1000 RPMs like it should but it now it would try to sit below there . I limped the truck home and found that I had a P0785 Shifting Timing Solenoid A code and a P0740 Torque Converter Clutch Circuit Open. Also a couple days before I started experiencing issues with my dash it started acting funny suddenly my speedometer would fly around and on the dash my tach would read zero or jump around I plugged in my Autocal Scanner and data logged and looked back my VSS were reading normall and my rpms stayed steady and where they should be so its definitely a gauge problem. Im looking for stuff to check first I recently did a 0411 Swap and it had been running great for about a month before this so i will check wiring and the actual PCM first. (The fact that its 2 codes at once and dash problems makes me think a wiring or PCM issue). Any other recommendations are greatly appreciated.