ac or heater don't blow
- Thread starter davig
- Start date
Blow motor or resistor. Usually the resistors are very common but only work on high when they go bad.
Ya I've tried high/low/auto/heat/ac nothing.. so sounds like it is a blower motor then. If that's bad is thereanyway I can check it before I replace it. Maby a code or something?
It could still be the resistor. It sounds like you have the digital climate control. Here's a wiring diagram for your setup. Check the red wire for power going to the resistor or in the diagram it's called the blower motor control processor. If the resistor is getting power but theres nothing going from the purple wire to the blower motor from the resistor. There's a good chance the resistor is bad. Make sure you check the grounds also.
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Check fuses first! Then check motor and resistor. I just recently had to remove my blower motor on my 07 show truck since the motor just all of a sudden quit working. Tried resistors, fuses, everything and nothing helped. Just getting ready to switch motors, just pulled old blower out and then plugged in back in just double check, it started working just fine again. Put it back in and it's been fine since! No clue why! but motor is a possible culprit as stated.
Turn everything on, then hit the blower motor with a hammer a couple times. If it turns on, replace the blower motor(worn out brushes). Or just use a meter & test for power and ground on the 2 wire connector at the motor.
I'd bet it's the blower motor.
I'd bet it's the blower motor.
GM vehicles are known for the wires going to the motor and resistor to fry, just get a flashlight and check for burned wires, if that's not it then check resistor next, after that then check blower motor. Its all pretty simple visual checks on the wiring connector and resistor because it will be scorched if its the cause.
I've replaced a TON of connectors down there over the years dunno why they do that though.
I've replaced a TON of connectors down there over the years dunno why they do that though.