LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2000 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - Diesel >> Diagnostic Tests >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Tests: Notes

NOTE: Before clearing DTCs, record FREEZE FRAME and FAILURE RECORDS for reference during testing. Data will be erased when DTCs are cleared. Perform OBD system check before proceeding with DTC tests, and upon completion of any repairs. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
NOTE: If PCM is replaced, PCM must be programmed using special equipment. See PROGRAMMING .