Reviewed By chris j (Topeka, KS) Reviewed for a 2009 Chevy Silverado —2/25/2017 11:04 AM
I didn't even need to update it before installing. Turned afm completely off. Slight performance gain. Shifts much better. Corrected speedometer.
Reviewed By brian l (Orchard Park, NY) Reviewed for a 2012 Chevy Silverado —2/20/2017 5:34 PM
Great product and easy to use. Just make sure you read the card accompanying the product regarding aftermarket electronic accessories installed on your vehicle (remote starter, amp, stereo, etc). Tech support from Hypertech very helpful and friendly. Excellent experience all around.
Reviewed By Shane P (MOORE, OK) Reviewed for a 2015 Chevy Silverado —6/10/2016 4:39 PM
Worked as advertised. My calculations say my tires are 34". With truck weight they measure about 33.5. That is the number I used and it put GPS spot on. Truck seems to be shifting back into 4 cal mode more regularly now helping to boast mpg. Worth the investment.