ReadyLIFT® customers have asked for it and we have delivered. Last fall we announced our new leveling and SST lift kit offerings for the all-new GM 1500 trucks. We specifically did not include the factory lift kit-equipped GMC AT4 and Chevy Silverado Trail Boss. The AT4/Trail Boss are factory equipped with a 2" front lift. This front lift includes a longer front shock/strut assembly. When combining a traditional leveling kit on these factory lifted trucks, several issues present themselves including binding problems with the factory control arm ball joint and contact concerns with the lower strut/CV axle assembly.

• 69-3920 +2" SST Lift Kit:
• 2019-2022 Silverado/Sierra 1500 AT4 & Trail Boss.
• Not compatible with Sierra AT4X or Silverado ZR2 Edition.
• 2" front lift combines with factory 2" lift.
• CNC-machined billet aluminum top spacer and pre-load spacer kit .with heavy-duty control arms, 1-ton ball joints and maintenance-free pivot bushings.
• Includes 3" tall OE style cast iron rear lift blocks with new U-bolts
• AT4 - Max tire 305/55-20, 20x9 0 offset wheel
• Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel

Note:  Not compatible with rear mono-leaf springs.

The 69-3920 SST Lift Kit works with the factory 2" front lift. This kit includes a top mount strut spacer along with a pre-load spacer to limit droop and the same premium grade upper control arms now available in our 66-3921 leveling kit. OE style 3" tall cast iron rear lift blocks and rear bump stop extension cups are also included to create a true AT4/Trail Boss-specific bolt-on lift kit that provides 2" of front lift and 1" of rear lift. This new lift kit concept is similar to our successful TRD Pro Plus 2 SST Lift Kit which is also engineered specifically to work with that factory OE suspension lift.

Your trust in ReadyLIFT to provide high-quality, precision engineered products is extremely important to us. You can be assured that this all-new SST lift kits are the absolutely most reliable and best performing suspension upgrade option for the AT4/Trail Boss trucks.

AT4 - Max tire 305/55-20, 20x9 0 offset wheel

Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel

NOTE:  Use of Auto 4 HI feature not recommended..

NOTE:  This GM 1500 kit is NOT COMPATIBLE with vehicles equipped with rear composite mono-leaf springs.  The mono-leaf is easily identifiable – the U-bolt is round/circular around the top of the leaf spring.  This kit only works with vehicle equipped with traditional steel leaf springs – identified by ‘square’ U-bolts.

NOTE:  Not compatible with Sierra AT4X or Silverado ZR2 Edition