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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P0641: 5-Volt Reference Circuit Out Of Range >> Diagnostic Procedure

Diagnostic Procedure

Fig 1: DTC P0641: 5-Volt Reference Circuit Out Of Range (Steps 1-3)
G00241402Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0641: 5-Volt Reference Circuit Out Of Range (Steps 4-14)
G00241403Courtesy of GENERAL MOTORS CORP.
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