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Most likely your problem is just the switch itself that controls the speed of the fan or a fuse. These are the easiest and cheapest things to check first. You can get the swithc at a local parts store or from a GM dealer. If that doesn't work check for loose of broken wires. It all that fails replace the blower motor. Check the fuse first.

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โˆ™ 2005-05-20 15:21:05
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Q: On a 1991 GMC Jimmy the ac heater and vents are not working not blowing air is this the blower if so how much does that run and how easy to fix?
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Related questions

Why will the heater on a GMC Jimmy not work?

Depends on what you mean by heater will not work. If the blower motor will not work, it can be a blown fuse, bad blower motor, bad blower motor switch, or a defective blower motor resistor pack. If you mean that the blower motor works but there is no heat, then it can be a clogged heater core, thermostat stuck open, or defective heater control valve.

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Your system could be low on coolant to flow through the heater core. You may also have a blockage somewhere preventing coolant flow into the heater core. If you can hear your blower motor blowing, perhaps the dash was put back into place incorrectly and the heat is being diverted away from it's intended path.

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Why the Blower motor not work on high speed on a jimmy 97?

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