Ok, I am a certified GM tech, recently Nissan master certified, ASE certified. We all run into problems that baffle us on some of these cars but this is a new one. It's a 1999 Chevy lumina, was brought to me by a friend for coolant loss and a shifting problem. I found and repaired a cracked radiator, worn/loose water pump, intake gaskets leaking. I couldn't drive it to check the Trans so since I knew it had a couple of dtcs for the pc solenoid and other shift related codes I bought a filter kit, PC sol. And fluid. Got done with the engine side of it and took it around the block. The car ran great and shifted like a clock. My brother followed me in this car to drop mine at my house and when we got there he said the Trans was not shifting. I got in, drove it and sure enough it was stuck in 3rd or forth gear and the low coolant lamp flashing. Coolant level is right. Trans fluid not burnt and is right on level. I turned the car off, no scanner at this time, restarted and drove it. Shifting great. Until the low coolant light came back on and started flashing. Seems as if the Trans went into failsafe and this time only a vss dtc. Checked vss- ok cleared dtc and all has been good for a week. I know it will return
have the same problem?
Sunday, June 30th, 2013 AT 4:22 PM