One problem related to dash wiring has been reported for the 2005 Chevrolet Silverado. The most recently reported issues are listed below.
For quite some time, our 2005 Chevrolet Silverado would have an odor and the #5 position on the fan for heater would stop working, then start again. Recently it completely stopped at all levels. We can no longer circulate heat or ac in the vehicle. We checked the blower motor resistor unit, it had melted and also melted the wiring harness up under the dash. We now have to replace both units at great expense to us. , not to mention this could have caused a fire. . . We usually have some grandchildren strapped in car seats. . . Which would have been quite dangerous to them, had it caught on fire. This has been going on for some time, not just the mileage indicated.