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2003 Chevy Silverado Performance Chips & Programmers

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Latest Customer Reviews

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

Not so technical user

Reviewed By Edward A (Greensburg, PA) Reviewed for a 2003 Chevy Silverado —9/24/2014 1:02 PM

I have had it installed for about a month. Shifting is smoother under load, milage is up from 14-15 to a solid 17 and overall I have no complaints. I was a little leary removing all the fuses to do the programming but it all worked. I wish it had a better manuel but thats a small con. I was expecting a slightly larger device (like a GPS) but its not needed.

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Hypertech Speedometer Calibrator Reviews

Works great!!!

Reviewed By Robert B (BOWDON, GA) Reviewed for a 2003 Chevy Silverado —9/21/2014 12:46 PM

I lifted my truck and put bigger tires on it so I needed to adjust my speedometer and this works perfectly, and the part that scans codes and clears codes work great also.

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DiabloSport inTune I-1000 Tuner Reviews

nice tuner

Reviewed By david g (WINFIELD, IL) Reviewed for a 2003 Chevy Silverado —7/30/2014 8:39 AM

i bought this bc i had a nice coupon code and wanted a nice tuner for my 03 silverado. I was impressed with all of the options i have to change. At first i installed the 87 tune and noticed a big difference right away. Once i changed a few more settings it really woke up my truck. i would def recommend this product.

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