Fuel leak - sending unit or retaining ring?

Hi all! I have a 2011 Yukon Denali 1500 and I have a fuel leak from the gas tank. Please have a look at the video that I've linked to and let me know your thoughts as to whether I should be replacing the fuel pump module or just the retaining ring. Even if it's hard to tell from the video is it a common issue for these retaining rings to fail.
The vehicle does hesitate to start but if I turn the key over and let it set for a few seconds before turning it all the way over it will fire right up. Once on the road it operates normally just reeks of gas. Thanks in advance for any help. Sorry for the video quality/technique really needed a third hand.

Quick video while running

dramaticpaws said:

Hi all! I have a 2011 Yukon Denali 1500 and I have a fuel leak from the gas tank. Please have a look at the video that I've linked to and let me know your thoughts as to whether I should be replacing the fuel pump module or just the retaining ring. Even if it's hard to tell from the video is it a common issue for these retaining rings to fail.
The vehicle does hesitate to start but if I turn the key over and let it set for a few seconds before turning it all the way over it will fire right up. Once on the road it operates normally just reeks of gas. Thanks in advance for any help. Sorry for the video quality/technique really needed a third hand.

Quick video while running

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Wow, that's good 'n rusty! The smart money is on replacing the fuel pump because the plate on top will rust out inside the ring. Also, the pumps start crapping out above 160K miles and have trouble maintaining steady pressure, followed by intermittent check engine lights, stabilitrak warnings, etc. Use ONLY an OEM pump, which will come with a new ring.

The OEM fuel pump assembly and sender are made well but usually crap out @ 100-150k leaving owners forced to buy a local generic or OEM for 2-3x the going rate.

Replace the carbon canister and verify it hasn’t burst it’s pellets 1st.

Order an OEM ac Delco or GM pump/sender only. RockAuto & parts geek has them for just under $2h with a new sender and lifetime guarantee. It’s a big job and not one you want to redo.

The generic overseas f/p usually last 12-14 Mo. It wastes diagnostic time and your labor to verify you got a POS f/p.

Google “5% off rockauto coupon” to get a few more $ off. Expect about $3-$350 in parts. Be sure to inspect inside fuel tank thoroughly to (hopefully not) find evidence of escaped carbon pellets.

petethepug said:

Google “5% off rockauto coupon” to get a few more $ off.

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Better yet, visit our own thread that shows current discount codes. No need to Google anything.

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