Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.

A small amount of resistance in battery positive voltage circuit to PCM may cause a no-start. Test battery positive voltage circuit for excessive resistance or corrosion.
PCM grounds will cause a no-start only if all of them are not making a good connection.
A loose CKP sensor may cause an intermitted no-start by moving away from reluctor wheel. Inspect sensor and mating surface for being clean and tight.