1996 blazer 4x4 fuel pump will not shut off when switch is turn off

yes I know that they run a few seconds after it's switched off ,but you switch my off it's known to run anywhere from 30 min or till it runs the battery down. I've recently put a transmission seal in that is about it

I say ECM problem... I have worked on as many of these as the next person... NEVER had this problem with one!... Always trying to get the darn pump TO run!!... Are you 100% sure you are removing the right relay????

relay is in the back of the glove box I removed all of them it didn't switch the pump off. The only way I can get it too shut off is too remove the fuse .

Short to battery voltage in wire harness or defective ECM! ECM supplies power to the relay!!

could it be a bad relay