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Old 10-05-2011, 12:17 AM   #4
Wincks2
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Join Date: Feb 2010
Location: Canada - Manitoba - Winnipeg
Posts: 425
Re: Anyone recognize this fuel sender wiring?

Took the sending unit out of the tank and it is a diesel sending unit from the year 82-83, the only year they made them with a third wire for a water in fuel light. The third Tube went down to t he bottom of the tank. The top was connected to a tube that tan along the frame toward the rear of the truck and connected to a petcock to allow draining water from the tank.
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Old Smokey: 85 GMC 3/4 ton long bed crew cab originally a 5.7 gas engine now with an 84 6.2 with a 92 serpentine belt system, a banks sidewinder, torque converter, and a shift kit. I bought her this way from someone handy - and now am trying to figure out how all this truck works.

The Old Smokey project: http://67-72chevytrucks.com/vboard/s...d.php?t=390518
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