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Old 08-31-2024, 07:03 AM   #2
Boog
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Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,434
Re: 88 C1500 LS Swap & AC Cabin Temp

That could very well be the blend door in the evaporator case is not closing completely. You could pinch off the heater hose from the engine to fire wall and see if that helps bring the air temp inside down.
The blend door actuators aren't terribly expensive if needed.
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.

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