How To Replace Rear Bumper 99-06 GMC Sierra
Difficulty: Advanced · About 150 min · Gmc Sierra
Replace the rear bumper on a 1999–2006 GMC Sierra by transferring the bumper pads, reinforcement, brackets, lights, and spare tire hardware, then aligning the assembly.
Tools you will need
- 15mm socket
- 18mm socket
- 21mm socket
- Ratchet
- Pliers
- Flat blade screwdriver
- Rust penetrant
Parts and supplies
- Rear bumper assembly
- Bumper mounting hardware as needed
Steps
- Remove the bumper assembly
Remove the bumper mounting nuts and bolts on both sides and below. Disconnect the license plate lamp wiring and spare tire lock bezel, then support the bumper as you pull it away.
- Transfer bumper components
Release the plastic pins and bumper pads, remove the license lamps and plate clips, and transfer the spare tire tube and retaining hardware as needed. Inspect all components for corrosion or damage.
- Assemble the replacement bumper
Position the reinforcement bar and attach its brackets and braces with suitable hardware. Start the fasteners loosely so the assembly can be aligned before final tightening.
- Install and align the bumper
Lift the bumper into position with the reinforcement above the hitch and brackets inside the frame. Start all mounting fasteners by hand, align the bumper evenly with the frame and tailgate, then tighten to the vehicle's specification.
- Refit pads, lights, and plate
Reconnect the license lamp wiring and install the bumper pads, plastic retainers, spare tire bezel, plate brackets, and license plate. Verify even clearances and secure mounting before using the vehicle.
Check your vehicle’s repair manual for exact specifications and fit.