Whats in the box: QTY= 1 PART NO.= SK-8L90-PDP-OS DESCRIPTION= Pulse Dampeners 8L45, 8L90 Note: Please double check that the years of the item is compatible with your vehicle ATS - 2016 - 2018 - 2.0, 2.5, 3.6 /L4, V6 ATS-V - 2016 - 2016 - 3.6 /V6 Camar-o - 2016 - 2018 - 2.0, 3.6 /L4, V6 Camar-o - 2016 - 2017 - 6.2 /V8 Canyo-n - 2017 - 2018 - 2.0, 3.6 /L4, V6 Colorad-o - 2017 - 2018 - 2.0, 3.6 /L4, V6 Corvett-e - 2015 - 2017 - 6.2 /V8 CT6 - 2016 - 2018 - 2.0, 3.6 /L4, V6 CT6 - 2016 - 2016 - 3.0 /V6 CTS - 2016 - 2018 - 2.0, 3.6 /L4, V6 CTS-V - 2016 - 2017 - 6.2 /V8 Escalad-e/ESV - 2015 - 2017 - 6.2 /V8 Sierr-a 2500 - 2015 - 2016 - 6.2 /V8 Sierr-a 3500HD - 2015 - 2016 - 6.2 /V8 Silverad-o 1500 Classic 1/2 Ton - 2015 - 2016 - 6.2 /V8 Silverad-o 2500HD Classic 3/4 Ton - Pickup - 2015 - 2016 - 6.2 /V8 Silverad-o 3500HD 1 Ton - Pickup - 2015 - 2016 - 6.2 /V8 Yuko-n - 2015 - 2017 - 6.2 /V8 Yuko-n XL 1/2 Ton - 2015 - 2016 - 6.2 /V8 Yuko-n XL 3/4 Ton - 2015 - 2016 - 6.2 /V8