Electrical problem
2002 GMC Sierra 6 cyl Four Wheel Drive Automatic
I have a 2002 GMC Sierra 1500.
The truck had stopped, and it appeared to be the fuel sending unit
That unit is a canister containing the fuel pump as well, and goes for about $400 retail.
To get the truck back on the road temporarily,
We changed the fuel pump (not the whole canister) and "hot wired" the fuel pump to a switched ignition 12v (fused) source.
The first time this was done, it worked fine for 1 week
(the pump burned out) .
We bought a new fuel pump and tried again.
This time, its working, but it takes 3-4 cranks before it starts.
It seems that the fuel pressure must be off, but we have no way to verify this.
1) What does the sending unit do ?
2) How many volts is the fuel pump?
(i checked the voltage at the sending unit and it was only 5 volts)
Any ideas for a solution ?
2002 GMC Sierra 6 cyl Four Wheel Drive Automatic
I have a 2002 GMC Sierra 1500.
The truck had stopped, and it appeared to be the fuel sending unit
That unit is a canister containing the fuel pump as well, and goes for about $400 retail.
To get the truck back on the road temporarily,
We changed the fuel pump (not the whole canister) and "hot wired" the fuel pump to a switched ignition 12v (fused) source.
The first time this was done, it worked fine for 1 week
(the pump burned out) .
We bought a new fuel pump and tried again.
This time, its working, but it takes 3-4 cranks before it starts.
It seems that the fuel pressure must be off, but we have no way to verify this.
1) What does the sending unit do ?
2) How many volts is the fuel pump?
(i checked the voltage at the sending unit and it was only 5 volts)
Any ideas for a solution ?
Jul 29, 2009 at 8:50 PM
