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

Front Blower Motor


Object Number: 661699  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Rear Fuse Block Battery Voltage
G201
Rear Blower Motor-Deville/DHS
Figure 2:

Rear Blower Motor-Deville/DHS


Object Number: 661700  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Rear Blower Motor-DTS
Front Blower Motor
G200
RR BLO, RR DR MDL, HVAC, Stop LP, IGN SW, and TSIG/HAZ Fuses
Class 2 Serial Data (1 of 3)
Steering Wheel Controls
Figure 3:

Rear Blower Motor-DTS


Object Number: 661701  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Rear Blower Motor-Deville/DHS
G201
G201
RR BLO, RR DR MDL, HVAC, Stop LP, IGN SW, and TSIG/HAZ Fuses
Class 2 Serial Data (1 of 3)
Steering Wheel Controls
HVAC Compressor Control
Figure 4:

HVAC Compressor Control


Object Number: 661702  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
G100
Underhood Fuse Block Battery Voltage
Ignition Feeds to Underhood and Rear Fuse Blocks
Steering Wheel Controls
Rear Blower Motor-DTS
Figure 5:

Steering Wheel Controls


Object Number: 671013  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
SIR Schematic Icons
Cruise Control Switches and Module Power and Ground
Actuators and Inside Air Temperature Control
HVAC Compressor Control
Figure 6:

Actuators and Inside Air Temperature Control


Object Number: 661726  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
HVAC Air Delivery/Temperature Control Sensors
ELC, Night Vision, HVAC, ABS Fuses
Figure 7:

HVAC Air Delivery/Temperature Control Sensors


Object Number: 661729  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Rear Actuator-DeVille/DHS
Actuators and Inside Air Temperature Control
Headlamp Switch (Domestic)
Headlamp Switch (Domestic)
Figure 8:

Rear Actuator-DeVille/DHS


Object Number: 661731  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Rear Actuator-DTS
HVAC Air Delivery/Temperature Control Sensors
G200
Steering Wheel Controls
Class 2 Serial Data (1 of 3)
MEM TT, RRLUM/ANT, and HTDST LF Fuses
IGN 3 Fuses
Figure 9:

Rear Actuator-DTS


Object Number: 661734  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Rear Actuator-DeVille/DHS
IGN 3 Fuses
G201
G201 IP Harness and Console Harness
Steering Wheel Controls
Class 2 Serial Data (1 of 3)
MEM TT, RRLUM/ANT, and HTDST LF Fuses
MEM TT, RRLUM/ANT, and HTDST LF Fuses
IGN 3 Fuses
IGN 3 Fuses