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

Cell 64: A/C Request


Object Number: 458183  Size: FS
Fuse Block Schematics
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Cell 64: ECM-B, IGN-E, A/C Fuses; Compressor Clutch, A/C CompressOr Low Pressure Cutout Switch, G101, G103 (7.4L)
Cell 64: 4.3L Gasoline Engine
Cell 64: 5.0L, 5.7L Gasoline Engine
98 GMT 600 Cell 64: 6.5L Diesel Engine
HVAC Components
Heater Blower Controls Circuit Description
Cell 64: 4.3L Gasoline Engine
Figure 2:

Cell 64: 4.3L Gasoline Engine


Object Number: 458189  Size: FS
Fuse Block Schematics
Cell 64: A/C Request
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Ground Distribution Schematics
HVAC Components
Heater Blower Controls Circuit Description
Cell 64: 5.0L, 5.7L Gasoline Engine
Cell 64: A/C Request
Power Distribution Schematics
Power Distribution Schematics
Figure 3:

Cell 64: 5.0L, 5.7L Gasoline Engine


Object Number: 458193  Size: FS
Fuse Block Schematics
Cell 64: A/C Request
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
HVAC Components
Heater Blower Controls Circuit Description
98 GMT 600 Cell 64: 6.5L Diesel Engine
Cell 64: 4.3L Gasoline Engine
Power Distribution Schematics
Power Distribution Schematics
Figure 4:

Cell 64: ECM-B, IGN-E, A/C Fuses; Compressor Clutch, A/C Compressor Low Pressure Cutout Switch, G101, G103 (7.4L)


Object Number: 501518  Size: FS
HVAC Components
HVAC Compressor Controls Circuit Description
98 GMT 600 Cell 64: 6.5L Diesel Engine
Cell 64: 5.0L, 5.7L Gasoline Engine
Power Distribution Schematics
Power Distribution Schematics
Power Distribution Schematics
Fuse Block Schematics
Cell 64: A/C Request
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Ground Distribution Schematics
Figure 5:

98 GMT 600 Cell 64: 6.5L Diesel Engine


Object Number: 458207  Size: FS
Fuse Block Schematics
Cell 64: A/C Request
Ground Distribution Schematics
Ground Distribution Schematics
HVAC Components
Heater Blower Controls Circuit Description
Cell 64: ECM-B, IGN-E, A/C Fuses; Compressor Clutch, A/C CompressOr Low Pressure Cutout Switch, G101, G103 (7.4L)
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Power Distribution Schematics