Problems with 2006 Chevrolet Colorado VISIBILITY

Blower motor on my 2006 chevrolet colorado quit working except for the high position. leaving the fan in the high position too long will cause the fan to quit working and then there is no a/c , heater or defogger that will work when needed. i took it to the dealer who told me that he knows what the problem may be, a relay or the wiring harness. at a cost of 328.00. he told me off the record if i wiggle the wiring harness it may work for a while since the harness most likely was incorrectly routed.. i have talked to many colorado and gmc canyon owners both in person and on internet forums who reported that they are having the same exact problem. this issue could be a safety issue especially in the winter time when the defogger is really needed to keep the windows clear for safe driving. i initially thought that it was just a simple burned out motor , and i would just need to replace it. but since what i was told from the dealer service writer, and what others have said in the forums, i would be wasting money especially is it is from a bad wiring harness. i think gm should look into this and make needed repairs. *tr

2006 chevy colorado- 4wd- z71, extend cab 1. premature rear brake shoe wear (more than front disk); 2. right brake light blows out repeatedly and shows shortout burns on contacts at bulb socket. replacing bulb just blows each time. 3. rear window leaks in heavy rain storms. *tr

Tl*the contact owns a 2006 chevrolet colorado. the contact stated that the abs and traction control lights illuminated, the left turn signal failed intermittently and the heater blower switch only work on the fourth setting. the vehicle had not been inspected or repaired. the failure mileage was approximately 40,000 and the current mileage was approximately 44,000.

Windshield wipers stop working intermittently. *tr

Heat and a/c fan would only work on high speed. *tr

Tl* the contact owns a 2006 chevrolet colorado. when attempting to use the heat in her vehicle the blower fan will only operate on certain fan speeds. the vehicle has not been diagnosed by the dealership. the current and failure mileages were 44000. updated 02/17/10 *bf the consumer stated it appeared to be a short with the fan. updated 02/17/10

The blower motor started to only work on the high setting, 4, all other settings, 1,2,3, were not working, i thought the blower control switch may have been bad. i checked with the dealer, the part to replace the switch is the whole control panel, $200. i wanted to make sure that was the problem before spending the money. i checked on the internet and found this is a common problem with colorado's. it turns out that the blower motor resistor block and connector are suspect. i did in fact check this out and found evidence of over heating on the connector. i can get the fan control to work properly by moving the wires on the connector to the resistor block. i think this is a safety concern due to the fact that others have reported the connector actually being melted from over heating. gm does not have any service bulletins or recalls out for this issue. on the internet search there was additional information concerning the grounding block in the engine compartment that has led to several electrical problems. i also found my grounding block to have had some corrosion build up that may have caused problems with my electrical system. my passenger side power window was intermittent. i cleaned the corrosion on the grounding block and everything is working properly. *tr