blower motor only works on 4 on 2007 Chevrolet Colorado

it does this all the time

by in Panama City Beach, FL on June 19, 2013
2 answers
ANSWER by on June 19, 2013
repl blower motor resistor,when they go bad they default to high and thats what you have. they cost approx 15.00 at the dealer and are easy to repl. its located under the glove box area
ANSWER by on July 29, 2013
Mine did the same. I replaced only the blower control & it worked for about 2 weeks then stopped working. Had to replace the blower control & the resistor. Been about a year & still working.
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