Location of the fuel tank pressure (FTP) sensor for a 2005 Yukon XL K2500 6.0

[70Hugger]

Hi all,

Does anyone have a picture or diagram showing the location of the fuel tank pressure (FTP) sensor for a 2005 Yukon XL K2500 6.0.
This truck has the dual fuel tanks with the EVAP canister behind the rear bumper.

It is NOT located in the top of the primary fuel pump as with the 1500 series Yukon.

Any help will be greatly appreciated.
Lou
aka: 70Hugger

 

[strutaeng]

IDK the answer, although I have a similar vehicle. I assumed it was on the top like everything else?

You want to browse this website see if there's a diagram or exploded view:

Free Service Manual for the 2005 Chevy Truck Suburban 3/4 Ton 4WD V8-6.0L VIN U | Operation CHARM

Detailed repair manual for the 2005 Chevy Truck Suburban 3/4 Ton 4WD V8-6.0L VIN U, including electrical diagrams, recommended bolt torques, and estimated labor times.

charm.li

 

[70Hugger]

Thanks for the quick reply strutaeng.

I went to the site put it shows location like a 1500 Yukon as part of the primary fuel pump.

My primary fuel pump looks like this with just a 4-pin connector for powering the pump and level sender.

Hope someone can also chime in for where that sucker is.

Lou
aka: 70Hugger

 

[strutaeng]

Thanks for the quick reply strutaeng.

I went to the site put it shows location like a 1500 Yukon as part of the primary fuel pump.

My primary fuel pump looks like this with just a 4-pin connector for powering the pump and level sender.

View attachment 442434

Hope someone can also chime in for where that sucker is.

Lou
aka: 70Hugger

Umm. Could it be on the auxiliary tank then?

I believe both tanks are simply connected with a Y pipe, no? At least that's what I have seen on mine. If they are joined by an open system, then you only need one pressure sensor.

 

[70Hugger]

Umm. Could it be on the auxiliary tank then?

I believe both tanks are simply connected with a Y pipe, no? At least that's what I have seen on mine. If they are joined by an open system, then you only need one pressure sensor.

No sir.
I dropped both tanks and the fuel pumps on both have no port or electrical plug for the FTP.

 

[Fless]

I searched the link that @strutaeng posted and found 5 occurrences of "fuel tank pressure sensor" and this was the only diagram that came up. Not sure if that helps.

 

[Fless]

Weird thing about that photo is it shows #1 but not #2 and #3. Kinda doubtful that #1 is the "fuel pump." Whatever it is should be mounted to the rearward side of the crossmember with two hoses connecting going forward.

 

[Fless]

Post up the last 8 digits of your VIN and maybe @915_Tahoe would be able to look it up for you, see what the part number looks like.

 

[70Hugger]

Thanks Fless,

I was thinking the same thing when I looked at the diagram you posted. (#2? and #3?).

As you suggested please see my last 8 digits of the VIN ---------5G119442.

Thanks.
Lou
aka: 70Hugger

 

[915_Tahoe]

Thanks Fless,

I was thinking the same thing when I looked at the diagram you posted. (#2? and #3?).

As you suggested please see my last 8 digits of the VIN ---------5G119442.

Thanks.
Lou
aka: 70Hugger

Looking into right now

 

[915_Tahoe]

Thanks Fless,

I was thinking the same thing when I looked at the diagram you posted. (#2? and #3?).

As you suggested please see my last 8 digits of the VIN ---------5G119442.

Thanks.
Lou
aka: 70Hugger

So I keep getting this gm# 16238399, and this is where it is located.

 

[70Hugger]

Well diving under truck @915_Tahoe was dead on!

My thanks to @strutaeng and @Fless for helping and suggesting to reach out to @915_Tahoe .

I found it to be retained on a 3-hose clip attached to the cross brace above the rear axle between the primary and secondary tanks.

The whole endeavor was a PITA lying on my 61yo back in my driveway.

Turns out failure was the primary fuel pump and clogged evap lines. Oh joy banging on and blowing compressed air through the convoluted metal evap line between the fuel tank and the purge valve up on the intake to clear out charcoal mouse turd pellets. I thought gorilla drills were bad jumping up and down to each end of the line over and over until I got it clear.

I blew out and tested the purge valve and installed a new canister and vent valve for good measure.

Anyway, all good now and I figured I pay it forward with some pics for the next person wondering where the fuel tank pressure sensor (FTP) is on a 2500 Yuke/Sub.

Lou AKA: 70Hugger

 

[Fless]

I have to say that our knowledge base has been positively upgraded. I'm not sure I'd ever thought to look for it there. Kudos to @915_Tahoe for his advice!

It's likely that the sensor wasn't defective, since the charcoal pellets would have made an evap test difficult if not impossible, and that the plugged lines caused a FPS code (if that's what you had) since it probably wasn't really exposed to the fuel tank pressure.

 

[70Hugger]

I have to say that our knowledge base has been positively upgraded. I'm not sure I'd ever thought to look for it there. Kudos to @915_Tahoe for his advice!

It's likely that the sensor wasn't defective, since the charcoal pellets would have made an evap test difficult if not impossible, and that the plugged lines caused a FPS code (if that's what you had) since it probably wasn't really exposed to the fuel tank pressure.

Yup. More than likely FTP sensor was just fine. But in for a dime ...in for a dollar.
I just threw a new one in there ACDelco GM for $38 to save my back.

Thank fellahs!
Lou
AKA: 70Hugger