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

70Hugger said:

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

Click to expand...

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

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

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.

Fless said:

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.

Click to expand...

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