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1994 GMC YUKON TEMP/DEFRST ACTUATOR
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sirjr
Novice
Mar 24, 2007, 8:41 AM
Post #1 of 2
(2301 views)
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1994 GMC YUKON TEMP/DEFRST ACTUATOR
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I have a 1994 GMC YUKON 2-door 4WD. A few weeks ago a clicking sound started coming from behind and to the left side of the the blower motor only when the ignition was turned on(vehicle does not have to be running) or shut off. The clicking sound would continue for approximately ten - twelve clicks, then stop. The blower motor worked fine. I have taken the glove box apart, the blower motor out and it seems that the noise is coming from what I think is called an actuator just to the left and behind the blower motor housing. It has an electrical connection, that when I remove the connection there is no more clicking. I have the Hanes manual and I got a copy of the 1994 C/K Truck service manual and neither has a picture or information on how to remove this "actuator" where mine is located. There are pictures of a temperature/defrost actuator in the manuals, but it is located to the extreme left of the blower, etc. not where the one on my truck is located. Can anyone offer me HELP! on explaining what this is as what it's function, whether I should just disconnect the electric connection and leave it as that, or explain how to remove this actuator. I am able to remove the lower screw , but the upper screw is so far towards the firewall that I cannot figure out how to remove it. Thanks for any Help! Steve
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sirjr
Novice
Apr 9, 2007, 9:35 AM
Post #2 of 2
(2278 views)
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Re: 1994 GMC YUKON TEMP/DEFRST ACTUATOR
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 Just want you to know that I was able to remove the upper screw from the actuator with a 1/4" drive rachet and 7mm socket. I was under the dash reaching up and my son's hand was through the glove box putting pressure on the socket so I was able to move the rachet a quarter turn at a time to unscrew the upper screw. I really do not know how you would do this with only one person unless your arms are 3 feet long!
The clicking sound was made from one of the gears in the actuator that had three broken teeth.
Steve
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