we have done all usual checks turned key over, made sure all battery connections are tight and clean, load tested the battery. we cannot think of anything else to do does anybody have a ideas or solutions
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2001 Cadillac DeVille Question: pass key 3, car will not start, hear relay click when key is in on or off positi
Answer #1HarbroCarGuy from Harbro Auto Sales & Service, October 28, 2011, 08:43Technician
Many GM vehicles have a problem with the passkey/passlock system. Im not sure on the 2001 DeVille, but I would at least TRY this: turn the key into the ACC position (dont crank the car) and let it sit for 10 minutes. See if there is a THEFT light. after 10 minutes, try to start it. (this is how you reset the passlock system)
This works on most GM's when the passkey system acts up, although I have not tried it with a DeVille.