Check Engine Light Due to Gas Cap Issue on Saturn LS1

A Loose or worn gas cap may cause Check Engine Light to illuminate.

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Average mileage: 75,000 (75,000–75,000)
1 model year affected: 2000
2 people reported this problem
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problem details
I have been having check enging light on I have oxygen sensor replaced and several other parts and light comes back on an they say it has something to do with gas cap not on proper I bought another gas cap and my gas gauge stopped working I put the old gas cap on and I wonder if the gas cap has a sensor can anyone tell me this info