Leaking fuel filler line

[Stbentoak]

Started to notice a drip on the garage floor that looked like oil. Slipped underneath, and see that it appears to be coming from the large fuel filler line that goes to the tank. The whole line is greasy and slippery from about the time it turned horizontal till it goes to the tank. Finally got bad enough that it dripped down on the frame crossmember and hit the ground. Anybody ever see anything like this?

Obviously a trip to the dealer is in order….
you can see the black spot on the frame.

 

[StephenPT]

My guess would be that worm clamp has loosened a bit (classic problem with screw drive clamps). Also, I would shift it to the left by about 1/4". Clamps should be installed just after the bead on the tube. It's a bummer that access to the screw is on the wrong side (mine is the same orientation). I would put a box end wrench on it, loosen, turn 180, shift closer to the bead and retighten.

 

[Stbentoak]

I'll let the dealer deal with it, just in case there is more to it than is obvious. Plus, I put a few more things on his list while it's in there.

 

[Stbentoak]

Update, had To order a whole new fuel filler neck assembly. Of course, part isn’t available…. they say hopefully less than a week.

 

[89Suburban]

At least it's not lifters like on the gassers! Sorry man.

 

[Stbentoak]

At least it's not lifters like on the gassers! Sorry man.

Yep, the more I read, the more I sing those praises every day. Other than a few pesky problems non diesel related, the vehicle and especially the engine have been superb.

 

[steiny93]

Yep, the more I read, the more I sing those praises every day. Other than a few pesky problems non diesel related, the vehicle and especially the engine have been superb.

Don't stay to much
Wife's diesel is down, waiting on a turbo, no eta on the parts; they thinking not January.

 

[Stbentoak]

Well they said they’d call today and they didn’t,so I’m assuming no parts on fed ex … miss it and need it.
Not dealers fault tho….

 

[Stbentoak]

Fuel neck replaced and all good there. The actual hose itself was split underneath the worm clamp....

While underneath the tech noticed the transmission cooler leaking and replaced that too. Pt # 24288625... Does engine coolant flow thru this exchanger? If so, that may be the cause of why my coolant was going low....Took over a week, but all good if everything is fixed....

 

[StephenPT]

Good deal to have a dealer that notices problems and replaces them without you having to complain first.

Transmission cooler has in/out for coolant and in/out for tranny fluid. https://www.gmpartsdirect.com/oem-p...ssion-fluid-cooling-exchanger-24288625?c=az0x