The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Anyone recognize this fuel sender wiring?

Wincks2 · 10-03-2011, 02:47 AM

Thanks!

I'd been using a diagram with wire colors matching those on my fuel tank selector valve and meter switch. Prior owner must have used a different sending unit with a fuel pump in the tank.

As fuel's been getting to the engine fine, the in-tank fuel pump must not be necessary on my truck. Could I just end the tan wire, connect the black one to frame for ground, and connect the pinkwhite one to fuel gauge?

My book shows vapour canister locations for several engines but not one for the 6.2 diesel. If the 6.2 doesn't use a vapour canister, maybe that is why he left the third tube unconnected. Could I just cap it? Without capping it diesel fuel pours out the third tube whenever I fill the tank. Would stopping the fumes from leaving the tank cause a problem? Or could I use a diesel filler neck cap that I've read is vented to allow the venting instead of venting through the third tube?

10-03-2011, 02:47 AM	#3
Wincks2 Registered User Join Date: Feb 2010 Location: Canada - Manitoba - Winnipeg Posts: 425	Re: Anyone recognize this fuel sender wiring? Thanks! I'd been using a diagram with wire colors matching those on my fuel tank selector valve and meter switch. Prior owner must have used a different sending unit with a fuel pump in the tank. As fuel's been getting to the engine fine, the in-tank fuel pump must not be necessary on my truck. Could I just end the tan wire, connect the black one to frame for ground, and connect the pinkwhite one to fuel gauge? My book shows vapour canister locations for several engines but not one for the 6.2 diesel. If the 6.2 doesn't use a vapour canister, maybe that is why he left the third tube unconnected. Could I just cap it? Without capping it diesel fuel pours out the third tube whenever I fill the tank. Would stopping the fumes from leaving the tank cause a problem? Or could I use a diesel filler neck cap that I've read is vented to allow the venting instead of venting through the third tube? Attached Images __________________ 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 Last edited by Wincks2; 10-03-2011 at 03:21 AM.