Sierra 2500 4WD V8-6.6L DSL Turbo (2007)
5. Install the engine wiring harness lead (3) to the IAH stud.
6. Install the engine wiring harness lead nut (1) to the IAH stud.
Tighten the nut to 10 N.m (89 lb in).
7. Close the IAH harness lead cover (2).
8. Position the engine wiring harness branches.
9. Connect the engine wiring harness electrical connector (2) to the MAP sensor.
10. Connect the engine wiring harness electrical connector (1) to the IAH.
