Engine Controls - Trouble Shooting - No Codes - 4.3L: Symptoms: Notes

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.