I replaced my original chrome gas cap with a locking cap from NAPA. Removing either one always caused a whoosh when it loosened. I guess it was just making room for the sucking sound that followed when I put gas in it.
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Member Nr. 2770
'96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed.
'69 C-10 SWB; 350/TH400 - in limbo
The older I get, the better I was.
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