The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Computer updates and flash...? Washington state

vanislejimmy · 10-20-2008, 01:40 PM

The check engine light in my 99 jimmy has been on for a few years now. it's the "evap code" same one as yours I think. I've tried a new gas cap, and had the charchol filter that the fuel tank vents into replaced. The dealer has looked at it a couple times, and can't find a problem. The light comes off and on mostly it's off in the summer and stays on all winter which makes me think that moisture is part of the problem. The truck runs great, so I just ignore it and haven't had any problems.

10-20-2008, 01:40 PM	#3
vanislejimmy Registered User Join Date: Jan 2007 Location: Vancouver Island, British columbia Posts: 138	Re: Computer updates and flash...? Washington state The check engine light in my 99 jimmy has been on for a few years now. it's the "evap code" same one as yours I think. I've tried a new gas cap, and had the charchol filter that the fuel tank vents into replaced. The dealer has looked at it a couple times, and can't find a problem. The light comes off and on mostly it's off in the summer and stays on all winter which makes me think that moisture is part of the problem. The truck runs great, so I just ignore it and haven't had any problems.