GM Service Manual Online
For 1990-2009 cars only

Fastener Tightening Specifications for GMC Truck TopKick C-Series (Crew) C4/C5 2003

Application

Specification

Metric

English

Air Horn Mounting Bolt

9 N·m

80 lb in

Electric Horn Mounting Nut

17 N·m

13 lb ft

Lanyard to Roof Panel Bolt

2 N·m

18 lb in