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Transmission doesnt shift properly and CEL when remote starting 2003 trailblazer

0 votes
Did an install on a 2003 trailblazer. ONLY when using the remote start it throws 3 codes P0740, p0785, p1860 all pertaining to the transmission. If you clear the codes, and dont use remote start they do not come back. I made sure the 2nd accessory is an accessory and not an ignition. Any idea what I may be missing? Using D2D
asked Dec 3, 2019 in Chevrolet by Daniel Waslenko (2,640 points)

1 Answer

0 votes
Either an ignition or accessory is not being powered or its not powered correctly. That is what causes this issue.
answered Dec 3, 2019 by Derek (178,310 points)
I'll have to check the vehicle again then. There may be an. Extra wire not on the diagram I guess. I already made sure both accessory were powered as accessory
2 ignitions

2 accessories

1 starter