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C3500 HD 6.5 F, Automatic
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Engine Control System Self-Diagnostics - Diesel
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DTC P0121: Accelerator Pedal Position Sensor 1 Circuit Performance
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Notes
DTC P0121: Accelerator Pedal Position Sensor 1 Circuit Performance: Notes
NOTE:
For circuit reference, refer to schematic. See
Fig 1
.
Fig 1: Accelerator Pedal Position (APP) System Circuit Diagram
Courtesy of GENERAL MOTORS CORP.