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Old January 23rd, 2011, 02:03 AM   #1
jeepguy74
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Default heater help chevy(gmc) s series

a buddy has a s15 and has a heater prob...it seams that the acuatorthat opens the door to the heater core either isnt shutting or opening like it should..it just blows cold air..the core isnt plugged but the ari isnt going over the core at all.. you canhear the door try to open but it just (sounds like it flops back) this only happens for just a second.....
my question is where is the acuator located under the dash...just dont wanna tear the complete dash apart trying to look for it...

any other ideas????
'
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Old January 23rd, 2011, 11:07 AM   #2
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Does the 4x4 have trouble engaging too? It sounds like a vacuum leak
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Old January 23rd, 2011, 09:14 PM   #3
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thats what i was thinking also but damned if we can find it...sorta acts like it is in the cab seamslike i can hear a little noise to make me think that... just trying to find the acuator to trace back from that point for a start because i cant seam to find it under the hood
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