Sierra 1500 4WD V8-6.0L VIN U (2006)
13. Install the 2 lower front end guard assembly fasteners (1) to the lower support bracket.
Tighten the bolt to 60 N.m (44 lb ft).
14. Lower the vehicle. Refer to Vehicle Lifting.
15. Install the front side brush guard.
16. Install the bolts (1) and nuts (2) to the front side brush guard (3).
Tighten the bolt to 45 N.m (33 lb ft).
17. Install the upper air baffle.
18. Close the hood.