Question about 1999 Chevrolet Silverado 1500

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I have a 1999 Chevy silverado 4x4 5.3 liter that will not pass emissions. It has been taken in 3 times and each reading calls for a drive cycle. How do i complete the drive cycle to pass emissions. The truck has been driven over 400 miles since the first test with several cool down periods. any suggestions

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Wasting your time driving it
Check for codes
Look at all data
Find a problem & repair

Have exhaust gas reading taken in a repair
shop, & use that to diagnose and repair

Posted on Apr 07, 2011

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There are certain parameters for a certain test to be done by the computer. I know that 1 test requires the vehicle to be started at above 70 degrees farenheit.(outside air temp) and is needed to be driven at 30 mph.. so they can be hard to pass my only suggestion is to keep drivin

Posted on Apr 07, 2011

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Posted on Jan 02, 2017

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