2001 Chevrolet Tahoe Support Question
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Question posted by wmhersh72 on January 11th, 2013
01 Tahoe 5.3 Vortec Big Fuel Mileage Loss
I changed spark plugs been running 93 octane ran lucas fuel treatment and had it at a garage and they ran diagnostics on it everthing checked out but noticed it took along time to warm up so they changed thermostat all sensors, cats,and o2 sensors checked out good only get 200 miles to tank of gas if i'm lucky. [no power loss] dont know what else to check for any info appreciated
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