GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series Commercial (Cutaway) C4/C5 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Cruise Control Schematics
Figure 1:

Cruise Control Switch - L18/LG4/LB7
Object Number: 795100 Size: FS
Master Electrical Component List
Cruise Control Description and Operation (6.6L and 7.8L)
Ignition Switch, RUN and ACC/RUN Bus Bars
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
Underhood Fuse Block, ENG4 and ENG1 Fuses (LG4/LG5)
Figure 2:

Cruise Control Switch - LG5
Object Number: 795102 Size: FS
Master Electrical Component List
Cruise Control Description and Operation (6.6L and 7.8L)
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
Device Controls - Switches