1998 GMC Other

Electrical problem
1998 Other GMC Models V8 Four Wheel Drive Automatic 123000 miles

My suburban has a bug that surfaces once in a while. I try to start the truck and it is dead. No clicking or anything. The alternator has been checked and I am on my second new battery. I had the battery tested and the cold cranking amps are gone. The interior power door lock switches do not work either.

what would cause this?
March 18, 2008.

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