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2004 Pontiac Grand prix ac grinding noise Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting IPityTheFool101 New User May 16, 2015, 7:52 PM Post #1 of 3 (1458 views) 2004 Pontiac Grand prix ac grinding noise Sign In When my ac is on, sometimes I hear a terrible grumbling/grinding/purring noise from under the glovebox. The only way to get it to stop is by shutting off and turning back on my ac. I find that these noises are triggered when I hit a bump in the road or I make a sharp turn. Any ideas on what may be the cause? Mileage: 140,000 Engine size: 3.8L Tom Greenleaf Ultimate Carjunky / Moderator May 17, 2015, 12:13 AM Post #2 of 3 (1446 views) Re: 2004 Pontiac Grand prix ac grinding noise Sign In ? You are probably hearing the blower motor and fan speed should change the noise. If so a new blower would usually be the fix, T Hammer Time Ultimate Carjunky / Moderator May 17, 2015, 5:14 AM Post #3 of 3 (1439 views) Re: 2004 Pontiac Grand prix ac grinding noise Sign In I'd pull the blower motor out and make sure there is nothing caught in it before replacing it. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. (This post was edited by Hammer Time on May 17, 2015, 5:14 AM)   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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