It would be hard to guess but a simple diagnostic would be to use a 12v test light and see if the starter solenoid recieves a 12 v signal while turning the key. If it lights, the starter should turn over. This also gives you the oportunity to check and verify all electrical connections at the starter including the large orange fusible link wire at the large battery terminal.
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I pulled the starter and took to Kragen for testing. The electronic module of the starter (solenoid?) was loose within it's metal shroud. The starter passed the bench test - but I bought the new anyway since the Solenoid appeared shakey at best. The new starter unit fixed the problem. Thank you for your assistance.
I have a 2002 GMC Envoy and it won't start. The starter solenoid clicks, power to dash, tapped on starter and solenoid and that didn't work, I am thinking it is the ignition switch under the dash, any ideas?
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