Questions & Answers

Transmission doesnt shift properly and CEL when remote starting 2003 trailblazer

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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 (2,650 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 g (342,860 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
commented Dec 4, 2019 by Daniel Waslenko (2,650 points)
2 ignitions

2 accessories

1 starter
commented Dec 4, 2019 by Robert T (300,340 points)

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