GMC Troubleshooting Questions? Ask a Mechanic for Answers
Whats the code stored for the check engine light ?
Sorry that didn't come up before let me check something for you I will post back in a few minutes.
ACCELERATOR PEDAL POSITION (APP) SENSOR
The accelerator pedal assembly contains 2 individual APP sensors within the assembly. The APP sensors 1 and 2 are potentiometer type sensors, each with the following circuits:
The APP sensors are used to determine the pedal angle. The control module provides each APP sensor a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltage proportional to pedal movement. Both APP sensor signal voltages are low at rest position and increase as the pedal is applied.
This is the most common issue going to post moe info hang in there.
Did you test the APP sensor this is usually the issue for this problem.