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Home >> GMC >> 2004 >> Envoy 4WD >> Repair and Diagnosis >> Body & Frame >> Windows >> Stationary Window System >> Diagnostic Information and Procedures >> Scan Tool Data Definitions >> HVAC Control Module

HVAC Control Module

Rear Defrost Switch: The scan tool displays On/Off. When the rear window defogger switch is pressed, the scan tool displays will momentarily display On.

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