Section 398 (Engine Controls - Self Diagnostics - 4.3L): Summary
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
If no Diagnostic Trouble Codes (DTCs) are present and a no-start condition exists, proceed toNO-START DIAGNOSIS in BASIC DIAGNOSTIC PROCEDURES - 4.3L SIERRA & SILVERADO article. If no DTCs are present and a driveability condition exists, diagnosis by symptom (i.e., ROUGH IDLE, ENGINE STALLS, etc.). See SYMPTOMS in TROUBLE SHOOTING - NO CODES - 4.3L SIERRA & SILVERADO article.