GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Sonoma Pickup - 2WD 🢒 Body and Accessories 🢒 Body Front End 🢒 Radiator Support Replacement

Removal Procedure
  1. Remove the battery. Refer to Battery Replacement in Engine Electrical.
  2. Remove the bumper Refer to Front Bumper Impact Bar Replacement in Bumpers.
  3. Remove the radiator grille. Refer to Grille Replacement in Exterior Trim.
  4. Remove the headlamp assemblies. Refer to Headlamp Replacement in Lighting Systems.
  5. Remove the hood release cable from the support and the hood latch. Refer to Hood Primary Latch Release Cable Replacement .
  6. Remove the latch support. Refer to Hood Latch Support Replacement .
  7. Remove the front wiring harness from the clips.
  8. Remove the ground screws from the radiator support.
  9. Remove the bolts that retain the fan shroud to the radiator support.

    10. Slide the shroud toward the engine.

  10. Remove the EVAP canister. Refer to Evaporative Emission Canister Replacement in Engine Controls.
  11. Remove the bolts that retain the battery tray to the radiator support.
  12. Remove the radiator baffle. Refer to Air Intake Baffle Replacement - Radiator .
  13. Remove the bolts that retain the air conditioning condenser to the radiator support, if equipped. Refer to Condenser Replacement in HVAC Manual.
  14. Raise the hood. Support the hood.
  15. Remove the hood support rod. Refer to Hood Hold-Open Rod Replacement .

    16. Object Number: 1593 Size: SH
  16. Remove the bolts that retain the radiator support to the right and the left fender.
  17. Remove the bolts that retain the radiator support to the right and the left wheel house panel.
  18. Remove the bolts that retain the left wheel house panel to the fender. Refer to Wheelhouse Panel Replacement .

    19. Object Number: 303006 Size: SH
  19. Remove the bolts that retain the radiator support to the frame.
  20. Remove the radiator support frame mounts.
  21. Lightly push the left fender away from the vehicle in order to allow a clearance between the fender and the radiator support.
  22. Slide the left side of the support away from the vehicle.
  23. Remove the radiator support.

Installation Procedure

    Object Number: 303006 Size: SH
  1. Lightly push the fender away from the vehicle in order to allow a clearance between the fender and the radiator support.
  2. Install the radiator support into the frame.

    3. Slide the right side of the support onto the frame. Pivot the left side of the support into place.

  3. Install the radiator support frame mounts.

    4. 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.

  4. Install the bolts through the frame mount.

    5. Tighten
    Tighten the bolts to 70 N·m (52 lb ft).

  5. Install the hood support rod.
  6. Install the bolts that retain the left wheel house panel to the fender. Refer to Wheelhouse Panel Replacement .

    7. Object Number: 1593 Size: SH
  7. Install the bolts that retain the radiator support to the right and the left wheel house panel.
  8. Install the bolts that retain the radiator support to the right and the left fender.
  9. Install the bolts that retain the air conditioning condenser to the radiator support, if equipped. Refer to Condenser Replacement in HVAC Manual.
  10. Install the radiator baffle to the vehicle. Refer to Air Intake Baffle Replacement - Radiator .
  11. Install the battery tray to the radiator support bolts.
  12. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement in Engine Controls.
  13. Install the bolts to that retain the fan shroud to the radiator support.
  14. Install the ground screws to the radiator support.
  15. Install the front wiring harness to the clips.
  16. Install the air intake hose.
  17. Install the latch support to the vehicle. Refer to Hood Latch Support Replacement .
  18. Install the hood release cable to the support and the hood latch. Refer to Hood Primary Latch Release Cable Replacement .
  19. Install the headlamp assemblies. Refer to Headlamp Replacement in Lighting Systems.
  20. Install the radiator grille. Refer to Grille Replacement in Exterior Trim.
  21. Install the bumper. Refer to Front Bumper Impact Bar Replacement in Bumpers.
  22. Install the battery. Refer to Battery Replacement in Engine Electrical.
  23. Lower the hood.
  24. Inspect the latch adjustment.