Re: ABS and TC lights
Not sure on that. If you can clear all codes and it still wont shift that's where I would be looking for a failure. History communication codes are the hardest thing to diagnose. As per GM diagnostics you should never even chase one. Any module on the data line can be causing the problem. Don't remember if I asked but do you have a remote starter installed? P1626 tells me you might have one as its a security code. If you do the security bypass module for the remote starter could be root cause and that's where I always start for these type of issues.
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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