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 !