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Re: Weird AC issue.
Sounds like fixing the lower actuator worked for you.
Here's a link for changing the upper acuator: https://www.instructables.com/id/How...de-temp-contr/
The upper looks like a major pain!
Does anyone have a flow diagram of the A/C system to get a better idea of what actuator location controls what function? I think there's 3 or 4 different actuators and they differ on what style A/C dash controller you have.
This looks like it could be such a major hassle!!!!
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 
1972 C10 5.3L/4L60E 12bolt 5Lug - Sold
1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 
1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold
1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold
1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold)
2003 K2500HD 8.1/Allison1000/NP263
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