Can anyone tell me where the oil pressure/ fuel pump switch in the 1999 blazer??

 

It doesn't have one. The pump will run 3 seconds when you turn the key on, run when it senses crank motion, run 3 seconds when you turn the key off.

 

thank you. Do you have any suggestion on my other question??

We have a 1999 blazer that has the fuel pump replaced 3 times in 4 months. the last time we beat on the tank and the truck started now it will not start. We have checked the replays, hot wired the pump and it ran but we have no voltage to the pump with the key on. Any suggestions?

 

check out this pic see if it matches your engine.
http://i11.photobucket.com/albums/a1..._Locations.gif

 

Are you sure? OReilly shows oil pressure switches for the gauge and also one for fuel pump switch & oil pressure. http://www.oreillyauto.com/site/c/se...zer&vi=1378997

 

And parts stores are known for being right! HAHA!!

RonJon is spot on. There is only one oil pressure sending unit (as shown in the image link above) and that does not directly tie into the fuel pump control system like the older models did.