After replacing the gas cap on a 2004 Malibu Maxx with ac delco locking model gt264 why would your check gas cap light come on?

Answer

Reset the computer by disconnecting the negative battery cable for a couple of minutes then reconnect. This will erase the codes from the computer. If everything is okay, the CHECK ENGINE light will stay off. The codes are stored in the computer when there is a problem. Even if you fix the problem, the codes are still there until you reset the computer.

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This is to share my side about that light Check Gas Cap. I bought it brand new and that light was on when I drove it home. Brought it back the next day and have it re-set. Following day it came on again. Brought it back and have it scheduled for testing. Smoke testing. They replace the gas tank. Brand new and have parts replaced already. Just imagine making new car smell like oil already. Mechanic dirty. After a week from the day of repair the same problem came out, check gas cap. Brought it back and they said crack gas carbon filter whatsoever they call it is crack and need to be replaced. Have to rent car which warranty pay for it but not the sales tax. Lo and behold no more Check Gas Cap light. Take it to test. Loosen gas cap if it works. No lights come on. I notify dealer and they try to explain any way they want to explain. I suspect that Check Gas Cap light was being disabled. I suspect that there was no problem on fuel system but the program or sensor are not working right. I complain to BBB and GM offer me one year of free oil change. I dislike thier customer service representative.

First answer by anonymous. Last edit by Doming. Contributor trust: 34 [recommend contributor]. Question popularity: 76 [recommend question]