Many techs find that once the plastic retainer is removed from the original equipment cam on GM trucks, the adjustment won't hold. These lock plates are designed to provide a mechanical lock for the cam bolt to the guide pin. Simply dial in the adjustment change with the original equipment cam or SPC's replacement kit #86376 and then replace the nut side cam with the lock plate. Use part number 86326 HD GM alignment pins to replace the often abused OE pins. This kit is designed for GM 2500/3500/4500 HD trucks (Upper Arm Adjustment) and the 2015 & up Chevy Colorado (Lower Arm Adjustment).

Installation Instructions

This Part Fits:

Year	Make	Model	Submodel
2015-2020	Chevrolet	Colorado	Base
2015-2022	Chevrolet	Colorado	LT
2015-2022	Chevrolet	Colorado	WT
2015-2022	Chevrolet	Colorado	Z71
2017-2022	Chevrolet	Colorado	ZR2
2020	Chevrolet	Silverado 2500 HD	Custom
2015-2020	Chevrolet	Silverado 2500 HD	High Country
2011-2020	Chevrolet	Silverado 2500 HD	LT
2011-2020	Chevrolet	Silverado 2500 HD	LTZ
2011-2020	Chevrolet	Silverado 2500 HD	WT
2015-2020	Chevrolet	Silverado 3500 HD	High Country
2011-2020	Chevrolet	Silverado 3500 HD	LT
2011-2020	Chevrolet	Silverado 3500 HD	LTZ
2011-2020	Chevrolet	Silverado 3500 HD	WT
2018-2020	GMC	Canyon	All Terrain
2021-2022	GMC	Canyon	AT4
2015-2020	GMC	Canyon	Base
2017-2022	GMC	Canyon	Denali
2021-2022	GMC	Canyon	Elevation
2021-2022	GMC	Canyon	Elevation Standard
2015-2020	GMC	Canyon	SL
2015-2020	GMC	Canyon	SLE
2015-2020	GMC	Canyon	SLT
2020	GMC	Sierra 2500 HD	AT4
2015-2020	GMC	Sierra 2500 HD	Base
2011-2020	GMC	Sierra 2500 HD	Denali
2011-2020	GMC	Sierra 2500 HD	SLE
2011-2020	GMC	Sierra 2500 HD	SLT
2011-2014	GMC	Sierra 2500 HD	WT
2020	GMC	Sierra 3500 HD	AT4
2015-2020	GMC	Sierra 3500 HD	Base
2011-2020	GMC	Sierra 3500 HD	Denali
2011-2020	GMC	Sierra 3500 HD	SLE
2011-2020	GMC	Sierra 3500 HD	SLT
2011-2014	GMC	Sierra 3500 HD	WT