I bought this truck new in March,2004. The dealer replaced the blower motor resistor and blower motor while under warranty. I've replaced two resistors since then. Next item to check is the blower motor relay.Where is it located and how do I check it out?
2004 Chevy Colorado Crewcab Pickup on 2004 Chevrolet Colorado
by Visitor in Schenectady, NY on August 17, 2010
ANSWER by mastertech6371 , August 17, 2010
did you use dealer resistors. aftermarkets never hold up under the heavy draw from the motor. i would not go to the relay. it is in the resistor. also, check the connector on the resistor, common for burning causing failures of the resistor. Roy
ANSWER by wondering04 , September 13, 2010
i have had the same thing too. it should be under the dash kinda be hind the glove box,
ANSWER by Visitor , September 24, 2010
sounds like you need a new connector also check black ground box under hood.this is next to the air filter box.make sure the ground screw is tight and its not painted behind it.
ANSWER by Visitor , December 07, 2010
I had the exact same problem, the motor would turn off and on when it felt like it. As one of the post said check the black box, the ground is not necessarily the problem. If you move the wires and hear the fan kick on you have a loose connection inside of the box. That was the problem with mine. good luck.