Recently switched sleepers out on my 2014 389 and new sleeper doesn’t have hvac hookups so want to block it off. Ordered a block off kit to block it off but not sure how to install it. Anyone used one before? Thanks!
Peterbilt 389 Sleeper A/c block off
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 02Peter379, May 14, 2026 at 2:07 PM.
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Assumption is that the cut lines went to the sleeper. If so the line circled with red can be cut and then brazed shut where the red line is. It will have to be removed. This is the high side. The blue can be brazed shut at #1 or buy a cap to block off after removing the nut at #2.
It looks like there is a hole circled in orange on the piece you purchased so this won't block anything.
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