Your Cart Is Empty

2003 GMC Sierra Performance Chips & Programmers

Have a Question?
Have a Question? Ask a product expert! (800) 874-8888 Live Chat
2 >

  • shipping icon
  • Not Rated Yet

 

View all reviews for this product

There are no customer reviews for this product

You may only compare up to 5 products at a time.
Please select at least two products to start comparing.
2 >

Latest Customer Reviews

Bully Dog GT Platinum Tuner Reviews


bully dog rating

Reviewed By Tim B (CORINNE, UT) Reviewed for a 2003 GMC Sierra —2/24/2016 5:28 AM

i would have thought that you could adjust between performance , towing ect. without redoing the whole set up. other than that i am completely satisfied.

View More Reviews

Hypertech Max Energy Programmer Reviews


Hypertech programmer is a quality product.

Reviewed By Gary R (CASPER, WY) Reviewed for a 2003 GMC Sierra —3/29/2015 4:58 PM

Easy to set up. Easy to program vehicle. Better acceleration; better power; some increase in MPG. Almost like having a new truck.

View More Reviews

DiabloSport Predator P2 Tuner Reviews


Good Unit

Reviewed By Kenneth P (East Carbon, UT) Reviewed for a 2003 GMC Sierra —6/19/2011 6:48 PM

The DiabloSport tuner did exactly what they said it would do with the performance tunes. It really made a difference in the performance of my 6.6 Duramax. However I have experienced a problem where certain tunes have caused a buzzing noise coming from the dash after a tune is put into the computer, still waiting on a solution.

View More Reviews