after a while it would stop until I returned it to speed 4. Is this the resistor failing, if so where is it located?
my blower only works on high-- it started by occasionally working normal on 2006 Chevrolet Colorado
poss resistor but ck with dealer 1st to make sure there are no recalls or cust assistance programs.
it sounds like your resistor check to see if there is any corrosion on your connection
Location-next to blower motor.