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You keep getting a check gas cap message on a 2002 Buick LeSabre but the gas cap not loose what is the problem?
After trying all sorts of fixes I finally found the problem on my Buick .It was simply a crack in a u-shaped rubber hose in the vacumn lines and a sensor right in front of the throttle body .Its about 4 inches long and u shaped and cracked slightlly in the u.Its the only rubber hose in the area as all the rest are plastic .replaced it with a longer plastic piece NO MORE LIGHT! 2002 buick 3,8 engine.
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