Sierra 3500 4WD V8-6.6L DSL Turbo (2007)
10. Install the auxiliary battery positive cable nut (1) to the mega fuse holder.
Tighten the nut to 9 N.m (80 lb in).
11. Connect the auxiliary battery positive cable electrical connector (2) to the engine wiring harness connector.
12. Install the relay (1) clip to the stud on the front of dash.
13. Install the mega fuse cover (3).
14. Install the auxiliary battery positive cable connector (1) to the UBEC.
