LK12-GMT04 4/6 Lowering Kit, 07-16 Silverado/Sierra 1500, 4WD, Cast Steel Arms, Double Adjustable


Estimated Shipping Date: Jul 29, 2024
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This QA1 lowering kit is an all-in-one solution for anyone looking to upgrade the suspension of their four-wheel drive 2007-2016 Silverado 1500 / Sierra 1500 with cast steel control arms. This kit includes QA1's front Pro Coil Coil-Overs, 2” Drop Spindles and 4/6 Rear Drop Kit, which provide maximum adjustability to achieve the perfect lowered stance, while providing significant improvements to ride quality and performance.

Ride Height Adjustability

QA1 lowering kits offer easy and precise adjustments for your truck's stance. Fully threaded front coil-over shock bodies provide adjustment without the use of clumsy shims or spacers. If you're looking for a 4/6 drop or looking to be even a bit lower, QA1's lowering kit is the ideal solution to achieve the perfect stance for you. The front coil-overs and drop offer a drop range of 3"-5" in the front. For the rear, you can lower it within a range of 4-6" with ½-inch increment adjustments.

Heavy Duty Shock Design

QA1 Engineers have tackled the challenge of supporting the weight and payload capacity of modern trucks by designing the heavy-duty version of our Pro Coil system, which features an upgraded shock with polyurethane bushings and a 1" chromoly T-bar. The system's new bushing design was specifically chosen to withstand the daily use of trucks, rather than using spherical bearings

Double-Adjustable Shocks

Upgrade your Silverado's performance to the next level with QA1 double adjustable Pro Coil shocks. Perfect for both street and track use, double adjustable shocks are famous for their independent rebound and compression tunability, giving you exceptional handling and control for finer control over your suspension.

Rear Shackles and Hanger Kits

QA1's Rear Shackle and Hanger Kits are the ultimate solution for lowering the rear of your truck without compromising ride quality. Made from heavy-gauge steel with a powder-coated finish and top-notch hardware, our kits guarantee long-lasting performance in any driving conditions.

Easy, Bolt-In Installation

Our commitment to thoughtful product design is evident in every fully bolt-in kit we produce, which guarantees a hassle-free installation process.

Best In-Class Lifetime Warranty

Register at for lifetime coverage of your QA1 shocks.

Made in the USA

QA1 truck suspension is proudly made in Lakeville, Minnesota.

Fitment Notes

Only compatible with trucks that have factory Cast Steel control arms.

Direct fit for 2007-2013 trucks

Only compatible with 2014 to 2016 trucks using Cast Steel control arms.  Will NOT work on 2014 to 2016 trucks with aluminum or stamped steel control arms.

Must be used with 17" minimum diameter wheels

Axle U-bolts not included
Does not fit 1500HD model trucks or 2007 Silverado/Sierra 1500 Classic
Offset upper control arm bushings (AcDelco PN 45K0201) may be required on vehicles lowered more the 2.5” to align within the factory specifications.


  • Includes Drop Spindles?No
  • Shock ValvingDouble Adjust
  • 2WD or 4WD4WD