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2005 GMC Sierra Power Programmers & Performance Tuners

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Latest Customer Reviews

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


Fuel Economy

Reviewed By Howard M (ENTERPRISE, AL) Reviewed for a 2005 GMC Sierra —12/13/2013 6:07 AM

I purchased the Bully Dog to increase fuel economy on my 6.6 GMC diesel. At first it didn't seem to make any difference so I called their tech support (they were great!) and discovered I did not have the settings correct. Since then I have seen an improvement on mileage and I love the different feel in the over all performance. I am glad I made the purchase!

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Hypertech Max Energy Programmer Reviews


Used on 05 GMC Sierra 2500HD, 6.0L gasoline, 4 spd Hydramatic...

Reviewed By Donald B (Chehalis, WA) Reviewed for a 2005 GMC Sierra —5/9/2011 11:07 AM

... auto tranny w/4.1:1 14 bolt rear end. I haven't used all the features but I tried the power programming and like the way my truck runs on the high octane setting. Noticeably more pep. Only slight increase in fuel mileage around town, about .5 mpg. 2 mpg gain on hwy though which is a pretty good percentage since I only get 14-15 hwy anyway. Was alsoable to dail in the speedo/odo. Pretty good product but will eventually want one that shows gauges and allows adjustments on the fly...

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DiabloSport PC Interface - USB Cable Kit Reviews


Predator for '05 Sierra 5.3

Reviewed By Matt D (SOUTHINGTON, CT) Reviewed for a 2005 GMC Sierra —3/9/2011 10:11 AM

The Predator is a great product which does what it says: Increase power Sharpen shifts (And if in a moderate tune)- increase fuel mileage

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