Gas cap error - gas spurting out fill spout
A few days ago I got the "Gas Cap Loose - Check Gas Cap" error and SES dash light on my '00 Buick LeSabre (160k miles). The gas cap wasn't actually loose. No big deal, I thought, the cap is probably old and lost its seal and I'll replace it.
With my tank near empty today, I start filling it up at the pumps. Within the first couple gallons, I hear gurgling from the fill spout then *whoosh* gasoline comes spurting/overflowing out backwards. I kept trying to fill the tank veeerrry slowly, but it would gurgle and back up everytime. I'm not a big fan of wasting money by pouring gasoline all over the ground, so I stopped.
Obviously there is a vent plugged up someplace, that is probably causing the gas cap error too. Where do I look and how is this fixed?
Current GMs: '95 Chevy Suburban C2500, '69 Pontiac Executive
Former GMs: '83 Buick Park Ave, '73 Buick Electra, '92 Chevy Caprice 9C1, '98 Pontiac Bonneville SLE, '99 Olds Aurora, '00 Buick LeSabre