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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 97 (FRAME AND UNDERBODY)REPAIR INSTRUCTIONSFRAME REPLACEMENTINSTALLATION PROCEDURE
2008 Pontiac Grand Prix Base

Installation Procedure

2008 Pontiac Grand Prix BaseSECTION Installation Procedure
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Utility Stand
    GM333118Courtesy of GENERAL MOTORS CORP.
  1. If you are replacing the frame, install the following components:
  2. Position the engine support table with the frame under the vehicle.
  3. Lower the vehicle to the frame.
    4. Fig 2: View Of Bolts From Rear Frame Of Body
    GM1208437Courtesy of GENERAL MOTORS CORP.
  4. Loosely install the bolts to secure the rear frame to the body.
    5. Fig 3: View Of Bolts From Front Frame Of Body
    GM1208433Courtesy of GENERAL MOTORS CORP.
  5. Loosely install the bolts to secure the front frame to the body.
  6. Align the frame to the body by inserting two 19 X 203 mm (0.74 X 8 in) pins in the alignment holes on the right side of the frame.
    7. NOTE: Refer to Fastener Notice in Cautions and Notices.
  7. Install the front and rear frame bolts.

    Tighten: 

    • Tighten the front bolts to 145 N.m (107 lb ft).
    • Tighten the rear bolts to 160 N.m (118 lb ft).

  8. Install the drivetrain reinforcements using the following procedure:
    1. Position the drivetrain reinforcements to the font cradle mount stud to the support brace.
    2. Loosely install the drivetrain reinforcement to support brace bolts.
    3. Install the drivetrain reinforcement to cradle mount nut.

      Tighten: 

      • Tighten the drivetrain reinforcement brace nut to 50 N.m (37 lb ft).
      • Tighten the drivetrain reinforcement brace bolts to 25 N.m (18 lb ft).

  9. Connect both the lower ball joints to the steering knuckle. Refer to Lower Ball Joint Replacement in Front Suspension.
  10. Install the nuts that secure the engine mount to the frame. Refer to Engine Front Mount Replacement in Engine Mechanical - 3.8L or Engine Mount Replacement - Right Side in Engine Mechanical - 3.6L.
  11. Install the nuts which secure the transaxle mount to the frame. Refer to Transmission Mount Replacement - Left Side in Automatic Transaxle.
  12. Install the steering gear mounting bolts. Refer to Power Steering Gear Replacement in Power Steering System.
  13. Install the stabilizer shaft links. Refer to Stabilizer Shaft Link Replacement in Front Suspension.
    14. Fig 4: View Of Front Wheel Speed Sensor Harness Connectors
    GM1209233Courtesy of GENERAL MOTORS CORP.
  14. If applicable, connect the wheel speed sensor wiring harness to the frame and lower control arm.
  15. If applicable, connect the front wheel speed sensor connectors (1).
  16. If applicable, install the front wheel speed harness retainers (2) to the frame and to the lower control arm.
  17. Install the positive battery cable and retainers to the frame. Refer to Battery Positive Cable Replacement (L26) or Battery Positive Cable Replacement (LY7) in Engine Electrical.
  18. Install the power steering cooler pipe. Refer to Power Steering Return Hose Replacement (3.8L) in Power Steering System.
  19. Connect the fog lamp harness connectors.
  20. Install the front tires and wheels. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  21. Lower the vehicle.
  22. Remove the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical - 3.8L or Engine Support Fixture in Engine Mechanical - 3.6L (LY7).
  23. Inspect the front wheel alignment. Refer to Measuring Wheel Alignment in Wheel Alignment.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.