GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Cruise Control Module and Steering Wheel Controls; Power and Ground


Object Number: 642142  Size: FS
Cruise Control Module PCM Controls and Vehicle Speed Input
Cruise Control Component Views
Cruise Control Description and Operation
Power to Underhood Fuse Block
Power to Underhood Fuse Block
Battery Feeds
ELC, INJR 1, and INJR 2 Fuses
G101 and G105
Figure 2:

Cruise Control Module PCM Controls and Vehicle Speed Input


Object Number: 642144  Size: FS
Cruise Control Module and Steering Wheel Controls; Power and Ground
Cruise Control Component Views
Cruise Control Description and Operation
Class 2 Serial Data Line (LH Drive) (1 of 2)
Class 2 and Tamper Switches
Stoplamp Switches
Stoplamp Switches
PCM Inputs/Outputs (1 of 2)
PCM Inputs/Outputs (1 of 2)