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Mark Kit

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  1. Mark Kit
    I have 2018 Silverado 4.3V6. When transmission goes from V6 to V4 I get excessive vibration. On cold start I get chatter from engine then puff of black smoke out tailpipe. Also when I’m in V4 mode truck is vibrating when I go back in V6 it stops. Dealer told me normal operation. Bull crap.

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