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Changing Fuel Pump Sending Unit

MountaineerTom

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MountaineerTom Senior Enthusiast

MountaineerTom

Posted
Posted

Part Two

 

Once the tank is off, it’s a good time to look around in that area to see if there are any other problems that may need to be addressed.

tank_off.jpg

tank_on_jack.jpg

no_tank.jpg

 

Before removing the fuel pump, be sure to clean off all the junk that has collected around it.

top_of_pump_close.jpg

 

Replacing the float and sending unit is fairly simple. Just pay attention to how the old parts are removed, and install the new parts in reverse order. Be sure to get the wiring routed correctly and install the new seal that comes with the kit. The sock filter on the bottom of the pump was just a little bit clogged, so we made a trip to the auto parts store to get a new one. Luckily they had one that would match up.

new_sender1.jpg

new_sender2.jpg

sender_wiring1.jpg

sender_wiring2.jpg

pump1.jpg

 

While we had the tank off, we siphoned what fuel was in there and cleaned out the tank really well.

draining_tank.jpg

 

The installation is basically just a reverse of the removal. Be prepared to take quite a bit of time for this project. It took much longer that I expected. Somewhere around 8-9 hours, but that’s including several little problems, lunch, and making a trip to the parts store for a new sock filter for the bottom of the pump. In comparison, we changed the sending unit in my sister-in-law’s Dodge Neon right after, and it took about 1 ½ hours total.

  • 4 weeks later...
BlackTaz Enthusiast

BlackTaz

Posted
Posted

THANKS Mountaineer Tom! I've been considering this job for my 99 Yukon. All of the information, and especially the pictures, are really helpful. Thanks for taking the time to post your story :thumbs:

  • 3 months later...
Roktman Enthusiast

Roktman

Posted
Posted

Hey Guys ,I am on the 4 th fuel pump in 3 years,yesterday switching to a Walbro.I have heard Gm pumps are crap.I suppose that this is true.I do have a supercharger kit on it .A twin screw Whipple on my Denali.

 

I have a Walbro on my supercharged 96 Impala SS and no problems. It pushes WAY more HP than the Denali.

 

Any experience along these lines?

  • 2 weeks later...
MountaineerTom Senior Enthusiast

MountaineerTom

Posted
  • Author
Posted

No problem BlackTaz. :thumbs:

 

Roktman, I have no experience with Walbro pumps.

 

Cowking01,

It's a very good chance that replacing your sending unit will fix that. That's what we went with on Elwood's Blazer. He was having intermittent reading, or the gauge was not working at all.

 

It could be you intrument cluster or fuel gauge itself, but I've never known anyone to have a problem with them, gauge-wise.

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