1996 Yukon fuel pump is running after vehicle is turned off.

[95TwinTT]

It also would help, to know if the "ECM B" mini fuse (20 amp), were pulled to see if it kills the fuel pump. It is in the under hood, fuse relay center.

That is the source of +12 volts for the oil sending unit. Just a thought........

 

[YukonDude]

This is what my problem was too. The pinched harness that runs on top of the transmission that is.