Chevrolet Tahoe Problem Report

Chevrolet Tahoe Check Engine Light Due to Gas Cap Issue

(24 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

I had this problem for over a year. Dealer "fixed" it for two weeks and $700. After being entirely frustrated I put it up on ramps myself and took a look underneath the rear of the car by the gas tank. Sure enough a hose was unplugged, I cleaned the oring in the fitting and snapped it back together. Problem fixed. NO $$$ -
Gas cap was lose -
check engine came on and I went to my local O'reilly's and used there machine to diagnosis the problem. The issues was resolves after I took my Tahoe to the dealership to get repaired. -
my i just unhooked light came on an the sensor throwing the code to get light off -
OMG, on going gas cap problem and engine light is going on. Way to expensive to pay a company to check the light and make the light go off. Really we need to buy a chip every time at $400. Any cheaper way to get this done?? Please give me ideas....... -
check engine light stays on. Throws four codes -
Check engine light comes on and warning about 'tighten gas cap'. No fix yet. Mechanic suggested buying real GM or ACDelco gas cap -
YOu can tighten the gas cap and it goes away--this is the 3rd gas cap we've replaced. -
Engine light on due to gas cap issue but we have not been able to fix it, switch cap several times, problem continues. -
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