Lost Communication with fuel Pump.

[Astroboy]

Originally Posted by blackdragon1

It looks like I need to remove / lower the fuel tank to replace the fuel pump is that correct ?

I think you're correct. The fuel pump is located in middle center of inserted into the tank from the above.

I just looked this up in the GM's official service manual (phonebook-thick, heavy, 3-volumes). The detailed instructions of how to do this procedure spans for several pages.

It seems the procedure involves:

- disconnecting the gas tank from the inlet hose which originates from the chrome fuel door.
- disconnecting the evaporation vent pipes (metal, small-diameter, long, and winding)
- dropping the entire fuel tank.
- draining the gasoline and handling care.
- removing and replacing the ruined fuel pump.

Wow, I didn't know there is so much involved.

(disclamer: I don't have a personal experience doing this, just a wannabe mechanic with manual)

I had the same experience that OP is having. One time, there was a knee-deep flood on freeway caused by busted water main. I proceeded to ford and go across this big 50-yard puddle while every other driver in regular car is inundated and stuck. They looked at me with envy. My H2 drove fine at 60 mph to my home with no hint of any malfunction. But next morning, its engine cranked but could not start and CEL came on.

I had to get my H2 towed to the dealership, and they fixed it under warranty.

The owner's manual specifies that H2 can ford water up to 20 inches, but this needs to be done at below 5 mph. Too bad, I was going faster than creating walls of splash curtains and enjoying it.

[blackdragon1]

Thanks Astroboy
This is a big help for me, I have ordered to fuel pump unit already..to try..
I also have the Service book x 3.

Yours sounds identical to me, I also was driving on flooded roads here in Macau during a small Typhoon / Hurricane at high-ish speed making huge curtains of water over the car... all day alot of fun until now. Then I drove one 1 more day before it stopped on me.

Did your dealer tell you why this would affect the fuel pump, unless water got in to the tank, I dont really understand why it would stop.Looks like a big job to drop the tank...

Any further info would be appreciated.

[blackdragon1]

Thanks Mike, from NewGMparts.com for all your email help in trying to solve my H2 fuel problem and sending me parts all the way to Macau.
Its great service like this, thats hard to find now days anywhere in the world. Keep up the good work, Reuben