Thread: 69 gmc dually soon to be 12valve
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Old 01-27-2015, 11:57 PM   #46
72MARIO
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Join Date: Nov 2000
Location: Huntsville Ontario Canada
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Re: 69 gmc dually soon to be 12valve
The only downside to any aftermarket heat/air is that they use inside cab air. Therw is no fresh air option which make defrosting windows using the heat function very challenging.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair
http://67-72chevytrucks.com/vboard/s...d.php?t=625017
1967 C/20 6.0/4L80 Roofing Truck
1990 V2500 Suburban "Plow Truck"
2005 TAHOE DD
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