GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Tracker - 2WD 🢒 Engine 🢒 Engine Controls - 2.5L (LE8) 🢒 Throttle Body Assembly Replacement

Removal Procedure

    Object Number: 674310 Size: SH
  1. Remove the front suspension support brace (1). Refer to Front Suspension Support Brace Replacement in Front Suspension.
  2. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.

    3. Object Number: 648012 Size: SH
  3. Remove the four fasteners and the engine surge tank cover (1).

    4. Object Number: 674983 Size: SH
  4. Remove the four nuts (1) retaining the intake surge tank (3).
  5. Remove the two air inlet duct (4) fasteners (2) and remove the engine surge tank (3).
  6. Loosen the hose clamps and remove the intake air inlet duct (4) from the throttle body.
  7. Disconnect the mass air flow (MAF) sensor electrical connector.
  8. Disconnect the throttle position (TP) sensor electrical connector.

    9. Object Number: 675822 Size: SH
  9. Disconnect the two coolant hoses (1, 3) from the throttle body (2).
  10. Disconnect idle air control (IAC) air hose from the top of the throttle body.

    11. Object Number: 720512 Size: SH
  11. Disconnect the accelerator control cable from the throttle body. Rotate the throttle lever (1) to wide open throttle (WOT) and remove the cable end from the slot (2).
  12. Remove the two fasteners and the accelerator cable bracket from the throttle body.
  13. Extend the transmission throttle valve cable and disconnect the cable end from the throttle lever.

    14. Object Number: 675802 Size: SH
  14. Remove the two bolts and the four nuts attaching the intake collector (1) to the intake manifold.
  15. Remove the two bolts and the two nuts attaching the throttle body (3) to the intake collector (1).
  16. Remove the breather hose (2) from the throttle body (3).
  17. Move the throttle body towards the front, while sliding the intake collector towards the rear, in order to remove the throttle body from the vehicle.

Installation Procedure

    Object Number: 675831 Size: SH
  1. Install a new throttle body gasket (1) onto the intake collector (2).

    2. Object Number: 675802 Size: SH
  2. Connect the breather hose (2) to the throttle body (3).
  3. Install the throttle body (3) onto the intake collector (1).
  4. Slide the intake collector (1) forward and attach to the intake manifold.

    5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Secure the intake collector to the intake manifold with the 2 bolts and 4 nuts.

    6. Tighten
    Tighten the fasteners to 23 N·m (16 lb ft).

  6. Secure the throttle body to the intake collector with the 2 nuts and 2 bolts.

    7. Tighten
    Tighten the fasteners to 12 N·m (8.5 lb ft).


    Object Number: 720512 Size: SH
  7. Connect the accelerator control cable to the throttle body. Rotate the throttle lever (1) to WOT and insert the cable end into the slot (2).
  8. Connect the transmission throttle valve cable to the throttle lever.
  9. Adjust the transmission throttle valve cable as necessary. Refer to Automatic Transmission Throttle Valve Cable Adjustment in Automatic Transmission.
  10. Adjust the accelerator control cable as necessary. Refer to Accelerator Cable Adjustment .

    11. Object Number: 675822 Size: SH
  11. Connect the two coolant hoses (1, 3) to the throttle body (2).
  12. Connect the IAC air hose to the throttle body.
  13. Connect the TP sensor electrical connector.
  14. Connect the MAF sensor electrical connector.

    15. Object Number: 674983 Size: SH
  15. Connect the intake air inlet duct (4) to the throttle body.
  16. Secure the inlet duct with the hose clamp.
  17. Connect the intake surge tank (3) to the intake manifold.
  18. Secure the intake surge tank with four nuts (1).

    19. Tighten
    Tighten the nuts to 23 N·m (16 lb ft).


    Object Number: 648012 Size: SH
  19. Install the engine surge tank cover (1) and secure with the four fasteners.

    20. Object Number: 674310 Size: SH
  20. Install the front suspension brace (1). Refer to Front Suspension Support Brace Replacement in Front Suspension.
  21. Refill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.