Two problems related to wiring have been reported for the 2007 Chevrolet Silverado 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Chevrolet Silverado 2500 based on all problems reported for the 2007 Silverado 2500.
A/c blower motor control module and wiring harness have failed 3 times. Fan speed 5 just stopped working and 1-4 still worked then 1-4 stopped working. I noticed a burning smell and discovered the wiring harness connection was melted. Oe was replaced with aftermarket parts which also failed . Replaced with aftermarket parts again . I was told by an a/c repairman that the wiring and harness were just a bad design and the last one I replaced would most likely fail also. There are many cases online of the same problem. I was parked when it failed the 1st time and I was driving when it failed the 2nd time and parked the 3rd time.
2007 chevy Silverado 2500hd. Smelt burning plastic from time to time and blamed it on outside fumes. August 2009 heater blower fan only worked on certain settings for a couple of days and finally totally failed. Looked up problem on internet and found that the blower resistor had failed which seemed to be a quite common problem. I located the problem myself and found the resistor and the wiring harness had melted together and the wires had melted the plastic off about 1 1/2" from the harness. From other research on the internet I found that one truck actually caught fire. I explained to chevy customer service my safety concerns and my disgust as to why this problem is not a recall. I don't believe that they are interested in resolving the problem. Could you please look into the matter some more and call electricalconnection. Com for more info. They sell the replacement part in a kit for the diyer and from what they tell me it is a common defect with gm since 1999 and they sell quite alot of their kits to people who's vehicles are out of warranty.