Air Conditioner Problems of GMC Canyon

The transmission does not down shift when climbing a small hill in normal traffic at normal speeds. I constantly have to use the manual transmission to make the truck downshift or I have to press on the grass in order to bring the rpm up a little higher using more fuel than required. This in itself is dangerous since I am in then middle of traffic. When I purchased the truck none of the recall were on carafe nor did the dealer inform me that this vehicle type and model has already had several recalls affecting its performance and safety. There is also something wrong with the defrost system whether its on heat or cool. There is a rattling noise that can be heard over the fan noise when the vehicle air conditioner is switch to the defrost mode. I am truly disappointed and very concerned for my safety. Gm should have pulled this vehicle off the market!.

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Air conditioning fan abruptly stopped working on all fan speeds except "4", the highest position. Checked internet for possible solutions and found that there have been numerous failures exactly like mine. All involved the "blower motor resistor assembly, connector and/or wiring harness" shorting out. Scortching the connectors, resistor assembly and causing the plastic to melt/burn. Gm parts at local dealership had replacement parts and I was able to resolve the problem. Speaking a gm service advisor, he confirmed that there are numerous repair problems with these parts on the GMC Canyon/ Chevrolet colorado 2004-2007. But no explanation for why they are failing. Numerous internet reports with photo's showing damage and explaining problem most requiring multiple or repeated repairs. Old parts are available.

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