Question about Cars & Trucks
If you have a poor ground on the blower motor or very worn blower itself, it can cause the resistor to become hotter than it was designed for. Less common causes are restriction in air flow in the heater box (resistor is air cooled) or gross overcharge condition from a bad regulator.(generally this would show up in other powered components as well though)
Posted on Nov 18, 2009
Try This. Go To YouTube And Type In "replace heater core blower 2003 GMC". You Might Get A Helpful Video Showing You One Being Replaced.
Hope This Helps.
Posted on Nov 25, 2011
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