Schematic and Routing Diagrams

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HVAC Schematics - Power, Ground, Serial Data, And Ambient Light Sensor

G01454526

Courtesy of GENERAL MOTORS CORP.

Fig 2: HVAC Schematics - Front Blower Controls

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Courtesy of GENERAL MOTORS CORP.

Fig 3: HVAC Schematics - Front Left And Right Temperature Control

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Courtesy of GENERAL MOTORS CORP.

Fig 4: Schematics - Mode And Recirculation Door Control

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Courtesy of GENERAL MOTORS CORP.

Fig 5: HVAC Schematics - Auxiliary HVAC W/ Heat And A/C - (1 Of 3)

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Courtesy of GENERAL MOTORS CORP.

Fig 6: HVAC Schematics - Auxiliary HVAC W/ Heat And A/C - (2 Of 3)

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Courtesy of GENERAL MOTORS CORP.

Fig 7: HVAC Schematics - Auxiliary HVAC W/ Heat And A/C - (3 Of 3)

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Courtesy of GENERAL MOTORS CORP.

Fig 8: HVAC Schematics - Auxiliary HVAC W/ A/C - (1 Of 2)

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Courtesy of GENERAL MOTORS CORP.

Fig 9: HVAC Schematics - Auxiliary HVAC W/ A/C - (2 Of 2)

G01454534

Courtesy of GENERAL MOTORS CORP.

Fig 10: HVAC Schematics - A/C Compressor Controls

G01454535

Courtesy of GENERAL MOTORS CORP.