oil pressure

i installed a new oil pressure sender on my truck and now my gage pegs out. its a 60 psi gage and a 60 psi sender.
any suggestions?
thanks
1978 gmc 350 1500

What prompted you to change it?

Is it possible that the sender was mislabeled?
Or the gauge is bad.

Bert

Personally I would be checking the wiring generally a "pegs out" is a sign of incorrect wiring, I would check the sender is connected as it is usually the device that provides the variable resistance. Also ensure the gauge is earthed as that provides the reference. Obviously you have the power (+12)

Andy.

unplug it from the engine & turn the key on in see if it go's back down to 0 pounds if it dose you have a bad sender