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Search Auto Parts Search 90 GMC Sierra heating troubles Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum WL New User Jan 12, 2007, 4:57 PM Post #1 of 1 (1508 views) 90 GMC Sierra heating troubles Sign In I have a 1990 GMC 1500 with 270,000 miles. The heater blower motor works but only at low volume. You can hear the motor change speeds but the volume does't increase. The same thing happens when the A/C is turned on. Anyone know how to fix this? WL   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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