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just joined today and have a question about wiring diagrams. I have an 03 ltz 4x4 that ive owned for several years now and I was wondering if anyone could tell me where to find a wiring diagram for the ignition system. It started having intermediate no crank no start issues a few months back and I want to resolve the issues soon. im pretty sure its the switch but I would like to check other possibilities while in in there. thanks.
 

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Register your name, email address and pick a screen name and password at CarQuest.

They will give you printable schematics for your vehicle.
 

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I had a no crank/no start issue recently. I swapped the relays to no avail. I even jumpered the relay pins assuming a bad relay and actually burned out the wire that way. I found it was the starter. Switch is not likely to go bad. Starter replacment is not too hard a job, but recommend doing it from top of engine and moving the PCM computer out of the way for arm access to starter.
 
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