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Gas Cap 08 Sierra

crepitus

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crepitus Enthusiast

crepitus

Posted
Posted

Ok maybe you guys can help me out. Over the last month I have been getting the Check Engine Light and message in the DIC to tighten gas cap. Had the code reset and got a new GM gas cap and yet again today I got the light for loose gas cap.. What else must i check?

herm0016 Enthusiast

herm0016

Posted
Posted

a pluged vent tube? or somthing to do with the venting or fuel return system is my guess.

crepitus Enthusiast

crepitus

Posted
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Posted

Anyone have any ideas where to look? I tightened all the connections around the filler neck. I am out of warranty but is this covered because it is a emmissions equipment?

Silverado4x4 Senior Enthusiast

Silverado4x4

Posted
Posted

Anyone have any ideas where to look? I tightened all the connections around the filler neck. I am out of warranty but is this covered because it is a emmissions equipment?

 

 

Yes.

asc08 Enthusiast

asc08

Posted
Posted

It may be covered. Read your warranty book, where it talks about emissions equipment warranty, and it should show you what is and is not covered under the extended emissions warranty. Some components are covered longer than others, but be sure to take the book to the dealer with you when you take it in, so there is no confusion.

xGMCx Enthusiast

xGMCx

Posted
Posted

When I had my CEL issue with the p0449 code, I occassionally would also get the "tighten gas cap" message. After replacing the cracked and bulging evap canister I have not seen the gas cap message since. I still have the same gas cap, no issues.

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