Section 146 (Engine Controls - Trouble Shooting - No Codes - 4.3L): Symptoms: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before proceeding with any symptom diagnosis, perform PRELIMINARY INSPECTION .
NOTE:
If PCM displays data but engine fails to start, see NO-START DIAGNOSIS
in BASIC DIAGNOSTIC PROCEDURES - 4.3L ASTRO, BLAZER, JIMMY CANADIAN, SAFARI, SONOMA & S10 PICKUP article.