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.