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

Cell 68: IP Junction Block


Object Number: 452097  Size: FS
HVAC Components
HVAC Temperature Controls Circuit Description
Cell 68: Temperature Controls
Cell 10: BATT 1, RDM, C/LTR, DDM, HTDST L, TRK REL, PDM, SBM, and CSTR/SBM FuseS
Cell 10: WSW, WSW/RFA, HUD, ELC, CR CONT, A/C and HVAC Fuses
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Cell 50: Power, Ground and E&C Serial Data Line
Cell 150: Radio Power and Ground
HVAC Connector End Views
Figure 2:

Cell 68: Temperature Controls


Object Number: 452098  Size: FS
HVAC Components
HVAC Temperature Controls Circuit Description
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
HVAC Connector End Views
Cell 117: Steering Wheel Control Switch, Heater and A/C Control, Driver Information Switch, Front Door Switch Backlighting
Ground Distribution Schematics
Cell 68: IP Junction Block
Cell 68: Temperature Sensors
Figure 3:

Cell 68: Temperature Sensors


Object Number: 452100  Size: FS
HVAC Components
HVAC Temperature Controls Circuit Description
Cell 68: Temperature Controls
Cell 68: Temperature Actuators
Handling ESD Sensitive Parts Notice
HVAC Connector End Views
Figure 4:

Cell 68: Temperature Actuators


Object Number: 452101  Size: FS
HVAC Components
HVAC Temperature Controls Circuit Description
Cell 68: Temperature Sensors
Handling ESD Sensitive Parts Notice
Cell 10: WSW, WSW/RFA, HUD, ELC, CR CONT, A/C and HVAC Fuses
HVAC Connector End Views