1981 GMC Light Duty on CDrom Officially Licensed Products OEM Original Automotive Repair Manuals on CDrom Cover-to Cover Reproductions in Easy-to-use PDF format of the same books that the dealer mechanics used Each CD Covers ALL Systems Including: General Specifications, Electrical,Engine Repair, Wiring Diagrams,Vacuum Diagrams, Front & Rear Suspension, Wheels & Tires, Axles & Drivelines, Torque Specs., Accessories, Insturments & Gauges, Vin & Body Tags, Brake Systems, Steering, Fuel Systems, Body & Trim, Transmissions, Lighting, Exhaust Systems, Frame & Chassis, Interior and Dashboard, Heating & Air Conditioning, Fully Licensed Product, Windows or Mac Finally, you can now have ALL of the necessary manuals for your make and model on one easy-to-use CD-ROM For one low price Runs on all versions of Windows or Mac