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2005 GMC Sierra Performance Chips & Programmers

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Latest Customer Reviews

DiabloSport Trinity T-1000 Programmer Reviews

Exactly what I was looking for.

Reviewed By Donald S (TECUMSEH, OK) Reviewed for a 2005 GMC Sierra —2/13/2016 7:22 AM

Tuner has very good tunes an abLe to upload custom tunes via download or micro chip. Can't beat this tuner the Trinity customer service SUCKS!! I emailed them asking how to make the tuner to power down once the ignition is turned off after 4 days I got a response from them, all they said is to unplug it from the ECM port. When i mentioned wanted to use the gagues feature while driving the CS Rep came back with "sent it back where u bought it an get a refund then". That isn't cool at all.

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Bully Dog Triple Dog GT 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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