Engine Controls - Basic Testing - 6.5L Diesel: Summary

If faults were not found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate TESTS W/CODES article below. If no hard codes are found in self-diagnostics, or vehicle does not have a self-diagnostic system, proceed to TESTS W/O CODES - 6.5L DIESEL article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

• TESTS W/CODES - 6.5L DIESEL (for C/K Pickup, Sierra Pickup, Suburban, Tahoe & Yukon)
• TESTS W/CODES - 6.5L DIESEL (for "P" & "G" Series Van)