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GMC Sierra Bully Dog Performance Chips

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Latest Customer Reviews

Bully Dog Triple Dog GT Tuner (49-State Legal) Reviews


Made no difference

Reviewed By Nolan S (MERRILL, MI) Reviewed for a 2008 GMC Sierra —12/18/2015 4:38 AM

Installed this product and it made no differnce, played with settings and still no difference. Installation is pretty difficult.

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Bully Dog Triple Dog GT Tuner (50-State Legal) Reviews


06 Gmc

Reviewed By Olivia C (OKTAHA, OK) Reviewed for a 2006 GMC Sierra —3/17/2015 8:14 PM

Best ever well worth the money my truck runs great

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Bully Dog Triple Dog GT Tuner (49-State Legal) Reviews


Six hours to install

Reviewed By Benny D (ADAMS, OR) Reviewed for a 2003 GMC Sierra —11/2/2015 8:17 PM

After a phone call to Bully Dog Tech the device began to do its duty. I'm still waiting. Fuel mileage has not changed. Performance is the same as it was before it was installed. I jump over the fence and what I thought was good was a blinding snow shower.

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