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Old 11-08-2015, 09:44 PM   #10
1978sierra
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Join Date: Nov 2015
Location: Vancouver Bc
Posts: 30
This truck has no AC , no dash speakers, no headliner, stock. Base model 78 Sierra with the 305


Quote:
Originally Posted by 1970pelle View Post
The way I have always water tested as shown many years ago. If the vehicle has A/C, close everything up meaning all windows,vents. Turn A/C on high and on Recir. Engine running of course, then soap the body seals down with very soapy water. The A/C is building cabin pressure and will bubble at air gaps.

Also high mounted rear bed lamp gaskets will leak and run down both sides of the cab .

Ken
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