I'm trying to troubleshoot the recurrent problem of slow fill at the gas pump. Last time I did this replacing the canister and vent solenoid didn't help. I've been living with it for over a decade.

I'm trying to think ahead. I'm trying to look for a rollover valve, in case that's the issue. Can't even find a part number. Is that a separate part on a 2005 C1500 5.3 Flex, or was that an integral (and non-replaceable) part of the tank?

 

it's usually a plugged filler neck or tank vent. try carefully blasting some compressed air through them.

 

Thanks. Tried that already. Disconnected that at the fitting on the Evap tubing 'snake' that sits on top of the tank. Blew compressed air up through the filler neck vent tube. Didn't help.

Hoping to avoid dropping the tank, but realize I may need to finally do that.