marshallsmith27
OBS Enthusiast
So I recently bought this truck and while running through it and checking for any problems it may have the headlight switch burnt up and since I had the bezel out I took the instrument cluster out to check all of the bulbs. I realized that someone at some point had removed the service engine soon light and replaced it. I have codes 37 and 43. 43 is easy enough I will go get a knock sensor and replace it but what do I need to do to fix code 37? It says that 37 is Torque Converter Clutch Brake Switch Circuit Error. That is fine and I know what it is but how do it go about fixing it. I cant seem to find any info on this code.
1993 Sierra C1500
1993 Sierra C1500