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Thread: tighten gas cap warning
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04-13-2009, 11:42 AM #1Sr. Mechanic
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tighten gas cap warning
Getting this alarm tighten gas cap, and its tight. Check engine light is on.
Any ideas?
John
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04-13-2009, 11:43 AM #2Sr. Mechanic
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06 gmc 4.8l cc 4x4
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04-13-2009, 02:25 PM #3Legend
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I know that if the gas cap does not seal, it will throw off the emissions readings. There is probably a sensor that monitors the pres. on the fuel tank. If it is showing a bad reading the CEL might come on. Just a thought. Good luck!
2010 Z/71 Colorado C/C
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Canyon Lake, Texas
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04-13-2009, 05:04 PM #4SpamAssassin
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I had that on my buddies 05 Jimmy. Replaced with aftermarket cap...problem fixed
Jamie
2007 Ford E250(Work van) (Ya, Ya, shut up!)
1996 GMC Sierra SLE 1500 5.7L/4L60E
http://www.thefundumpster.com
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04-26-2009, 07:40 PM #5Newbie
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This just to get my three posts to remove sticky on home page.
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06-15-2009, 10:12 AM #6Jr. Apprentice
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Dont buy anything.
When this tank of gas runs out, buy gas at a different station, then put the gas cap back on as you normally do.
This should take care of the problem. Usually caused by a bad tank of gas, or the gas cap not put on tightly enough.Tom -
2005 Suburban 4x2
2005 Equinox LT AWD
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06-15-2009, 10:21 AM #7Legend
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Bad tank of gas????? Please explain, Thanks.
Originally Posted by 05-Burb
Jim
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