GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Envoy - 2WD 🢒 Engine 🢒 Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Accelerator Pedal Position Sensor Replacement

Removal Procedure

    Object Number: 899725 Size: SH

    Notice: Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.

    Important: If the vehicle is equipped with adjustable pedals, refer to Accelerator Pedal Assembly Replacement.

  1. Disconnect the accelerator pedal position (APP) sensor electrical connector.

    2. Object Number: 742494 Size: SH
  2. Remove the 3 APP sensor bolts (1).
  3. Remove the APP sensor (2).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 899728 Size: SH
  1. Install the APP sensor.
  2. Install the 3 APP sensor bolts (1).

    3. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).


    Object Number: 899725 Size: SH
  3. Connect the APP sensor electrical connector.
  4. Verify that the vehicle meets the following conditions:
    5. • The vehicle is not in a reduced engine power mode.
    • The ignition is ON.
    • The engine is OFF.
  5. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  6. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle.