1999 Pontiac Montana Doing Diagnostic Test Once Tester Plugged Does Van

16,000 MILES
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Doing a diagnostic test, once the tester is plugged in, does the van need to be started or just turn the key to the on position to retrieve a code?
Nov 11, 2012 at 10:59 AM
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ASEMASTER6371
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on position or running.

roy
Nov 11, 2012 at 11:00 AM
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