fuel pump or fuel gauge sending unit?

[Rick]

hey all, i noticed today that when i hit the brakes to stop (usually only when its a harder stop) at about a quarter tank the gauge goes to zero and the gas light comes on. was wondering if its the pump on the way out or the sending unit. headed on a road trip tonight and dont wanna go if its the pump... any help would be much appreciated!! thanks

 

[dropmech]

I know that anytime you're on an incline that stupid gauge goes wacky. Not sure about just hitting the brakes though. I've always just kept an eye on my odometer. I trust that over the fuel gauge.

 

[Rick]

thanks. its not running out of fuel im worried about. its the fuel pump possible going on my road trip. then im paying some hillbilly mech in the middle of nowhere some ridiculous price to fix it

 

[dropmech]

The fuel quantity gauge won't have anything to do with whether the pump is working or not. The gauge works off of a float in the tank. If the pump ***** the bed, you won't be able to start the truck.

 

[Rick]

damb, ok. just wishful thinking on a sign its about to go... thanks