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

Power, Ground, Serial Data and Transfer Case Encoder Motor


Object Number: 878309  Size: FS
Master Electrical Component List
Transfer Case Circuit Description
Speed Signal, Front Axel Actuator Control and Indicators
G201 - 1 of 2
Data Link Connector and SP205
TRAILER, ABS, ATC, BLOWER, ELEC BRK, CIGAR, ST/LP, VEH CHMSL, and VEH STOP fuses
Figure 2:

Speed Signal, Front Axle Actuator Control and Indicators


Object Number: 743984  Size: FS
Master Electrical Component List
Transfer Case Circuit Description
Power, Ground, Serial Data and Transfer Case Encoder Motor