We've bundled everything you need in a leveling kit for your Silverado Trail Boss/Sierra AT4 with high quality Cognito components. There's no guesswork. Cognito components are engineered, manufactured and assembled in the USA. The Cognito 1 Inch Standard Leveling Kit includes the Cognito Standard Upper Control Arm Kit, and .75 Inch Strut Spacer Kit- all with hardware included. The Cognito Standard Upper Control Arms are built with a modified ball joint angle to eliminate travel limitations of the ball joint in lifted applications. This design also eliminates the need to cut the service perch off of the truck if they are used as part of our Cognito package or as a stock replacement. The .75 Inch Strut Spacers are constructed out of heavy duty steel and finished with a durable semi-gloss black power coating.

Made in the USA. Included components:
Cognito Standard Upper Control Arm Kit (110-90864) .75 Inch Strut Spacer Kit Cognito Sticker Pack Each Kit Features: Yields 1 inch of front lift .75 Inch Strut Spacer Kit Cognito Standard Upper Control Arm Kit Improved ball joint angle Enhances the trucks appearance and reduce the factory nose down rake Improved ball joint angle Maintains adequate droop travel to retain ride quality Fits up to 34 inchx12 Inch tire and 9 inch wide wheel with 5.75 Inch back space 2.5-hour DIY install time Made in The USA Warning! -This product is not compatible with vehicles equipped with ARC Adaptive Ride Control (includes all 1500 Denali models). The Cognito Standard Upper Control Arm was not built with ARC compatibility and if installed will negate the ARC functionality of your 1500 Denali vehicle.