AZjeff
$50 Site Donor 2023
The OP's truck has an Ecotec3 AFM engine so it would be the 8/6/4 version. The newest iteration for 2019, Dynamic Fuel Management, will run on 8,7,6,5,4,3,2 cylinders in 17 different patterns. GM put the monkey business on all cylinders not just 4. Good or bad thing..who knows?
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