It’s not always easy to recognize when your vehicle is suffering from a simple problem that requires a little maintenance and TLC or there is real engine damage as symptoms can be overlooked and seen as “normal.” While not all sounds and smells may threaten the life of your car or truck engine, there are some obvious warning signs that require a vehicle inspection here at the shop right away.
This Joe Knows features a 2006 GMC Envoy with no heat; this is a common problem we see. Shown in the photos is a burnt heat resistor vs. a new one. This resistor controls the blower speed from the blower switch on the dash board. Too often the switch is kept in one position, continual high current passes through and in some cases, and over a period of time melts the resistor and connector. Once the damage is done a 'short' harness and resistor will fix the problem most of the time.