2008 Silverado 5.3L LT. I bought this as a joke before buying another well known brand AFM blocker, thinking I'd try it and return if it didn't work. Follow the included instructions and drive to test the device. So far, so good. AFM is disabled and no check engine lights or codes are output at the time of this review. At less than half the cost of the Range unit, I see no reason why I shouldn't save $150 and give it a try. I will update this review if anything changes.
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