GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2004 🢒 ION 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Schematics
Figure 1:

Blower Controls
Object Number: 1255355 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
A/C Compressor Controls (C60)
Fuse Block - Underhood Fuses: IPBATT2 and RUN (IGN3) BCM Fuses: BCM Elect, Cluster, Fuel Pump, HVAC, IGN SW, and Stop
Fuse Block - Underhood Fuses: IPBATT2 and RUN (IGN3) BCM Fuses: BCM Elect, Cluster, Fuel Pump, HVAC, IGN SW, and Stop
Air Recirculation Controls (C60)
G203
Figure 2:

A/C Compressor Controls (C60)
Object Number: 1255356 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Recirculation Controls (C60)
Blower Controls
Ignition Switch
Fuse Block - Underhood Fuses: ABS, ABS1, ABS2, ECM, ECM/TCM, IGN, LH HDLP, Prem Audio, RH HDLP, Run/Crank
Fuse Block - Underhood BUS
G101 - Early Production
G101 - Early Production
G101 - Late Production
Figure 3:

Air Recirculation Controls (C60)
Object Number: 1398845 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
A/C Compressor Controls (C60)
G203
Blower Controls
Defogger Schematics
Interior Lights Dimming Schematics