2005 yukon xl denali 6.0

[TollKeeper]

Next step would be to find out if they replaced the fuel pump by itself, or the fuel pump assembly.

 

[TollKeeper]

Depending on the shop, I can see them only replacing the pump. They can be had for around 134 bucks. Assemblies are quite a bit more expensive at the 400 mark..

 

[Yukonxljake]

They replaced the whole Fuel pump assembly. 4 times haha

 

[ks03]

If you try to bump the key to bump over the engine, can you just bump it, or will it try to crank on its own for a few seconds?

 

[Yukonxljake]

I think it just bumps

 

[ks03]

So my theory is that you might have to bump it to run the fuel pump. I’m curious if you bumped it, waited a few seconds, if it would then start normally without a long crank time

 

[TollKeeper]

So from here you will need to do a little bit of diagnostic work.

It sounds like the fuel pump might not be priming when the key is initialized.

To check this one, you would need to be under the truck, while someone else sits it the truck. Have them turn on the key, but do not engage the starting side of the ignition. Listen to see if the fuel pump primes.

 

[TollKeeper]

You could also go into your fuse bank, and swap the fuel pump relay with one from another location. See if it primes the fuel system KOEO (Key On, Engine Off).

 

[Yukonxljake]

So from here you will need to do a little bit of diagnostic work.

It sounds like the fuel pump might not be priming when the key is initialized.

To check this one, you would need to be under the truck, while someone else sits it the truck. Have them turn on the key, but do not engage the starting side of the ignition. Listen to see if the fuel pump primes.

Great idea!

 

[Yukonxljake]

You could also go into your fuse bank, and swap the fuel pump relay with one from another location. See if it primes the fuel system KOEO (Key On, Engine Off).

I will try that as well!