2003 GMC Yukon Q&A
2003 GMC Yukon Question: My T/C light is on and want go off. What can the problem be?
I replaced the ABS Module and that's when the T/C light came on and want go off. I took it back to the shop who did the work and he came up with codes P1571, P1689 and he said that it has something to do with my transmission but when I went to research the codes and what they mean it doesn't state anything about the transmission. Help! - tresierrabri
take to tranny specialist. could be as simple as dirty connection. could mean the torque conv. failing. tranny tech. will know. review when tranny last serviced. it may just be due. - arturo08
Both of those codes could relate to wiring/bad connection issues. Does the shop you are taking this to have the capability to communicate with the ABS computer, or does their equipment only support OBD-II protocol? Why was the EBCM (ABS computer) replaced in the first place? Without looking at the car, I can't say for sure, but an internal transmission problem doesn't sound likely from the information I have. - United Auto Service Center