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Heater blower fan squeels when turned on. - 1999 GMC Sonoma

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Try sraying it with abit of wd and or loosen it abit with a wrench.

Posted on Jan 02, 2011


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Heater fan squeeling. doesn't blow air.need to know what to remove to get to fan,

I have a 99 Century, and have encountered the same problem. If you lift the hood, near the windshield there are two plastic vents, check to see that above and underneath them are free of leaves, acorns, etc. Once they are clean if it still squeaks, lift the plastic vents with the blower fan on high and give it a good spray of some kind of lubricant. (WD-40, Silicone, etc...) Hope it helps, it helped me.

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Blower Fan on 1989 Pathfinder is squeeling. How hard is the replacement?

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1 Answer

Heater blower motor

On my '95 Trans Sport (I don;t think theere's any difference - under the hood - look about the middle of the firewall near the top. You'll see the motor & outer housing. There are 4 screws in the housing, but don't know if disconnecting & removing the screws will allow you withdraw the blower assy on the engine side of the firewall.
For me, I checked there was volts at the blower electrical connector.
There was, so I took a soft hammer and whacked the motor casing a few times. It started to turn, but with a squeel. So I whacked it more, the squeel lessened & the motor speeded up. So I just continued whacking from different directions until I seemed to have aligned things - max speed, no squeel. Seems to be working 100% now (for the time being).
If no volts at the motor connector, try whacking the blower relay at the upper portion of the firewall about a foot to the left of the blower. This worked as a temporary fix on my old '91 APV. Eventually it failed for good. The new relay fried in short order. Had to put in a higher Amps one. Also check the relay connector, mine was corroded out and had to be replaced as well.

Nov 09, 2008 | 1990 Chevrolet Lumina APV

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