Fuel gauge staying past full and sucking enough juice to make truck stall.

I had and erratic fuel gauge needle and truck was sluggish. Suddenly the needle went past full and stucked there. Later I got a check engine and truck stalled. After further tests the P0107 MAP low voltage code came out but the problem was not the manifold absolute pressure sensor. There is a 5 wires connector sticked to the driver fender that I unplugged and the engine started fine and ran fine. After further test the EGR and MAP voltage went back to 5 volts instead of 2.08v before I unplugged that connector also the fuel gauge went back to empty position. No more engine code, engine starts fine and run better but as soon as I plug it back the engine stall or perform sluggish and needle go back past the full position.The five wires are black, green, pink, white and grey. The grey give the 5 volts and the pink the 12 volts. Strange thing is that both side of the connector the grey wire give the 5 volts when grunded to the battery. I'm joining an image so you can help me identify this connector and what's for exactly. Thank you !