Mechanics

AIR CONDITION

1998 GMC C2500 • V8 2WD • 21,000 miles

1998 GMC Sierra. Air condition fan sounds like the fan is running strong but not bowing hard out of the vents?
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Racerx7533
July 23, 2011.




Check and test the air blend door/actuator

Tiny
Rasmataz
Jul 23, 2011.
Is it coming out the defrost instead?
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Wrenchtech
Jul 23, 2011.
Yes it's coming out of the defrost also!

Tiny
Racerx7533
Jul 24, 2011.
That means you're having a problem with the mode door actuator mechanism. It's located on the left end of the HVAC housing. Check it while the system is running. It could just be stuck or bound up.

Wrenchtech
Jul 24, 2011.

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