Mike's Workshop Manuals
: Service manuals for every vehicle
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GMC
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1991
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Forward Control 7.4 N
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Repair and Diagnosis
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Heating, Ventilation & A/C (HVAC)
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General Servicing
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A/C System Specifications
A/C System Specifications
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Compressor Applications Table (Light Trucks & Vans)
Body Code Designations Trucks & Vans
Light Truck & Van Refrigerant Oil & R-12 Capacity