Instruct: Classify an Amazon review as either positive or negative.
Query: Perfect fit

Check engine light went out about two days after replacing the gas cap on my 2008 Buick LaCrosse with this Stant cap. I bought the locking cap because my fuel door does not have a latch. The lock is easily operated by a half turn CCW by the key, half turn on the cap, pull out the cap, half turn of the key CW and pull the key out and the cap is ready to put back on after fuel-up. So easy my wife can do it.