Yukon/Denali 4WD V8-5.3L VIN T (2004)
6. With the aid of an assistant, remove the bolts (1, 5) and the nuts (2, 3) from the assist step brackets.
7. Remove the assist step from the vehicle.
8. Remove the heater and A/C tubes retaining nuts from the studs, if equipped.
9. Remove the assist step bolts (6) from the brackets.
10. Remove the brackets (4) from the vehicle.
Installation Procedure
Important: Use the Threadlocker, GM P/N 12345382 (Canadian P/N 10953489), to all bolt threads prior to assembly.
1. Install the assist step brackets to the vehicle (4).
2. Install the bolts (6) to the brackets and ensure that the brackets are seated securely to the inner rocker panel.
3. Install the heater and A/C tubes retaining nuts to the studs, if equipped.
4. With the aid of an assistant, install the assist step to the vehicle.
5. Install the bolts (1, 5) and the nuts (2, 3) to the assist step bracket, and leave the nuts loose.
Notice: Refer to Fastener Notice in Service Precautions.
6. Install the bottom fender bolt (2) and the washer (1) to the vehicle.
Tighten the bottom fender bolt (2) to 25 N.m (18 lb ft).
