Question about 2005 Chevrolet Silverado 2500HD 2WD

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Gas mileage is terrible,check engine light on,put on computer by friend said o2 sensor -i wasnt sure my friend new what he was doing so took to auto zone now they say the computer wont read

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Auto zone reader will sometimes not read codes. take it to your local garage and ask them to plug into it with an updated reader. i dont charge to read a code and i would hope they dont either. the o2 sensor could cause bad gas mileage. whens the last tune up done? check air filter. plugs? also check air in tires. low tires can cost fuel mileage as well. hope this helps

Posted on Mar 26, 2011

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