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Home >> Chevrolet >> 2003 >> Chevy Express H2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Controls Self-Diagnostics - 4.3L) >> Self-Diagnostic System >> Diagnostic System Check - Engine Controls >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Do not perform this diagnostic if there is not a driveability concern, unless another procedure directs you to this diagnostic. Before you proceed with diagnosis, search for applicable service bulletins. Unless a diagnostic procedure instructs you, DO NOT clear the DTCs. If there is a condition with the starting system, see appropriate STARTERS article in STARTING & CHARGING SYSTEMS. Ensure the battery has a full charge. Ensure the battery cables are clean and tight. Ensure the PCM grounds are clean, tight, and in the correct location.
Fig 1: Diagnostic System Check - Engine Controls (1 Of 2)
G00239702Courtesy of GENERAL MOTORS CORP.
Fig 2: Diagnostic System Check - Engine Controls (2 Of 2)
G00239703Courtesy of GENERAL MOTORS CORP.
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