'02 Tahoe fuel odor & P0440

[donmauldin]

Replaced my fuel pump recently, and about 2 weeks later got an odor of raw gas, and Service Engine Soon, code P0440. Changed out gas caps , reset the light and the problem continues.
5.3 Flex Tahoe. Suggestions welcome.
Thanks

 

[Project Denali]

This is your VIN information report stating the vehicles assembled equipment

 

[Project Denali]

This is the 2001 Yukon weight and towing capacities chart (poorly highlighted with your configuration)

 

[Project Denali]

This is what your a pillar/door placard will look like with the same weight ratings which is inside the driver door (again poorly highlighted, sorry)

 

[Project Denali]

Apologies, please delete wrong thread!

 

[Project Denali]

On another note, P0440 is not uncommon. Attached is a screenshot from ProDemand with the top causes of your specific dtc.

 

[Project Denali]

I have personally had issues with the purge solenoid located on the front of the intake manifold, and the seal on the gas caps before. Remove your gas cap and check the sealing edge for cracking.

 

[exp500]

If you smell fuel, that usually means leak. Hate to suggest you may have to go back in. Check your hoses first. And you may get lucky with just an O-ring replacement.

 

[Sam Harris]

If you smell fuel, that usually means leak. Hate to suggest you may have to go back in. Check your hoses first. And you may get lucky with just an O-ring replacement.

This was my thought as well.

 

[rockola1971]

Replaced my fuel pump recently, and about 2 weeks later got an odor of raw gas, and Service Engine Soon, code P0440. Changed out gas caps , reset the light and the problem continues.
5.3 Flex Tahoe. Suggestions welcome.
Thanks

You likely either got the big oring kinked up when installing the lockring that holds fuel module in place or once of the hoses you removed has a failed seal. Did you install clamps on filler hose to tank? Crawl under the tank and reach up on top and see if its wet around fuel pump lockring. If its then you get to replace that large oring again or you have a leaker hose in that area.