I have reviewed the fuse map on the inside cover of both fuse boxes - no fuel pump fuse (just the fuel pump relay switch).
I am pretty sure I properly hot-wired the pump when I tested it. However, I will be sure to test it before putting the tank back up.
Removing the tank is not that big of a deal (if there is not much fuel in it). There are about a half dozen bolts on the skid plate, and the two bolts on the removable ends of the tank straps. Then you have to disconnect the tank filler and vent hoses from their metal tubes coming from the "gas cap compartment".
But you can't just drop the [45 gallon] tank all the way to the ground because the fuel lines and wires are two short. So, with the truck on jack stands, I lowered the tank onto a wheel rim which kept it elevated about 7 inches above the ground. That gave me plenty of space above the tank to remove the pump.
The biggest pain in the neck is disconnecting the two primary fuel lines (the supply and the return) from the pump because the quick connectors are difficult. I purchased an $8.00 quick connector disconnecter tool at Auto Zone. When I got home with it I remembered why I returned the one from the first time. The pump is designed so that the only exposed part of the nipples is two short to get the tool around. Worthless in this case. So, I ended up jacking the 4 mini spring clips with a mini slot head screwdriver as I pulled the connectors at odd angles.
The Chevy dealer quoted me 4 hours labor and $900 to replace the pump. So instead I purchased one on eBay for $86 and did the entire thing myself as a first timer in about 4 hours.
Putting the tank back up can be a bulky experience - especially if there is too much fuel rolling around in it (my wife helped the first time). But aside from the time I spent diagnosing, I would say that as a second timer I could probably drop the tank, remove and replace the pump, and reinstall the tank in about an hour - if I had a little bit of a helping hand.
The only advantage about hiring the dealership is that this repeating problem would now be their problem and not mine.
Thursday, October 11th, 2007 AT 1:09 PM