1999 GMC Safari 6 cyl Four Wheel Drive Automatic 105,000 miles
Preparing to change the fuel pump and noticed a box? Beside the fuel TANK that has one line running to the pump. I have an idea what this device is. I think it is the fuel pump pressure regulator. CORRECT? Is this attached to the return line? Is there some kind of a test I can do that will tell me if it is working? I checked the fuse and changed the pump relay. I hear no pump running noise nor is there any pressure when I took off lines to change the filter. I'm assuming the pump is bad and bought one. I don't want to change the pump if there could be another reason why it's not working. That device I described above concerns me. How would I know if it's the cause.
Any info would be appreciated, Thanks.
4/29 Thanks. Is it your opinion that the problem is just the fuel pump?
Tuesday, April 27th, 2010 AT 6:20 PM