Just changed my fuel filter and the black wire is broken off the bottom. Could not put back together cause broke of flush with plastic. The truck starts up fine and no lights on the dash. What will happen with that wire being broke until I get a new one? Just fuel filter percentage not move?

yeah i was wondering the same thing, i think it may be for the water in the filter sensor

Yes it is for WIF sensor.

Anybody know the best place to get a new one at?

Merchant Automotive has them. It is a dealer item normally.

I had to replace mine, cause it was getting beat up. I bought it through the dealership and I think I paid about $45.00 for it.

well i dunno about you guys but the factory sensor in my opinion are crap a couple of use here on dp wanna get some alumnium plugs made and need 2o people to say they want em this maybe another option for u guys they gunna be 50 bucks
http://www.dieselplace.com/forum/showthread.php?t=352192

On the Dmax vans it is just a plug with drain. I am guessing it would be much cheaper than the truck one with sensor but you never know with GM.