Cross-Member: Service and Repair

2004 Pontiac Aztek AWD V6-3.4L VIN ESECTION Service and Repair


Crossmember Replacement

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the tire and the wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
3. Support rear differential carrier using utility stand.




4. Remove the rear differential carrier mounting bolts (5) from the rear crossmember. Refer to Differential Replacement in Rear Drive Axle.
5. Remove the rear suspension knuckle. Refer to Knuckle Replacement (All Wheel Drive) in Rear Suspension.
6. Disconnect the wheel speed sensor harness from the lower control arm and from the rear cross member.
7. Remove the rivets that attach the park brake cable to the rear crossmember.
8. Remove the automatic level control (ALC) height sensor and link from the crossmember bar and lower control arm. Refer to Automatic Level Control Sensor Replacement in Automatic Level Control.
9. Secure the ALC wiring harness out of the way.
10. Using a utility jack, support the rear crossmember.
11. Remove the rear crossmember mounting bolts.




12. Lower the rear crossmember.
13. Remove the rear stabilizer shaft. Refer to Stabilizer Shaft Replacement (All Wheel Drive) .
14. Remove the rear axle upper control arms from the rear crossmember. Refer to Rear Axle Upper Control Arm Replacement (All Wheel Drive) .
15. Remove the rear axle lower control arms from the rear crossmember. Refer to Rear Axle Lower Control Arm Replacement (All Wheel Drive) .
16. Remove the tie rods from the rear crossmember. Refer to Tie Rod Replacement (Front Wheel Drive) Tie Rod Replacement (All Wheel Drive) .



Installation Procedure

1. Install the tie rods to the crossmember. Refer to Tie Rod Replacement (Front Wheel Drive) Tie Rod Replacement (All Wheel Drive) .
2. Install the rear axle lower control arms onto the rear crossmember. Refer to Rear Axle Lower Control Arm Replacement (All Wheel Drive) .
3. Install the rear axle upper control arms onto the rear crossmember. Refer to Rear Axle Upper Control Arm Replacement (All Wheel Drive) .
4. Install the rear stabilizer shaft onto the rear crossmember. Refer to Stabilizer Shaft Replacement (All Wheel Drive) .




5. Raise the rear crossmember.
6. Install the rear crossmember mounting bolts.

Notice: Refer to Fastener Notice in Cautions and Notices.

7. Tighten the mounting bolts.

Tighten the rear crossmember mounting bolts to 130 N.m (96 lb ft) .

8. Install the ALC height sensor onto the crossmember and lower control arm. Refer to Automatic Level Control Sensor Replacement in Automatic Level Control.




9. Install the rear differential carrier mounting bolts (5). Refer to Differential Replacement in Rear Drive Axle.
10. Attach the parking brake cable onto the rear crossmember. Refer to Park Brake Cable Replacement - Left Rear (Disc) Park Brake Cable Replacement - Left Rear (Drum) and Park Brake Cable Replacement - Right Rear (Disc) Park Brake Cable Replacement - Right Rear (Drum) in Park Brake.
11. Connect the wheel speed sensor harness onto the rear crossmember and the lower control arm.
12. Install the rear suspension knuckle. Refer to Knuckle Replacement (All Wheel Drive) .
13. Install the tire and the wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
14. Inspect for rear alignment and adjust as necessary. Refer to Measuring Wheel Alignment in Wheel Alignment.
15. Lower the vehicle.


RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.