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

Trailer Provisions (without EXP)


Object Number: 1873347  Size: FS
Master Electrical Component List
Control Module References
Trailer Provisions (EXP)
Figure 2:

Trailer Provisions (EXP)


Object Number: 1873350  Size: FS
Master Electrical Component List
Control Module References
Trailer Provisions (without EXP)