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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1668
Experience:  GM Grand Master Technician 2007. 14 year experience.
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2003 GMC Envoy. Put in repalcment engine. Crank, no start.

Customer Question

2003 GMC Envoy. Put in repalcment engine. Crank, no start. P1681 code. Has good fuel pressure at filter, does start with shot of starter fluid. Does this code indicate that PCM needs to be reprogrammed. Cant think of reason for that since nothing was replaced other than physical engine
Submitted: 1 year ago.
Category: GMC
Expert:  Eric replied 1 year ago.
HI,
How long was the battery disconnected for while pulling and installing the new engine?
Did you use the same year engine?
When you turn the key to the on position, does the security light stay on until key is turn off, blink on and off, come on and go off within 10-15 seconds of turning the key to the on position?