Service Leveling System/Speed Limited Message Due to Aftermarket Modifications – 2021 Cadillac Chevrolet GMC

NHTSA ID Number: 10202399

Manufacturer Communication Number: PIT5854


This Preliminary information communicates information on vehicle speed being limited due to aftermarket lower kit being installed on the vehicle.



Some customers may comment on a Service Leveling System/Speed Limited message on DIC. Dealers may find no DTC’s present.



This could be caused by incorrect vehicle ride height variance due to an aftermarket lowering kit installed.


4 Affected Products




1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5854
Published date: 09/21/2021

MC-10202399-9999.pdf 1397.865KB




Bestseller No. 2
Bestseller No. 3
KSP Shackle Lowering Kit fit for 2019+ Che-vy GM-C, 1"or 1.5" Adjustable Rear Drop kit Work on 2019 2020 2021 Sierra 1500 Silverado 1500 Solid Steel Supension Leveling Kits
  • 【Fitment】The adjustable shackle kits will drop 1" or 1.5" for 2019+ G-MC Sierra 1500 2wd/4wd and Che-vy Silverado 1500 2wd/4wd;Please pay attention that the kits will lift your car on the model 2002-2008 RAM 1500 2wd/4wd
  • 【Solid Quality】Replaceable and greaseable polyurethane bushings for driving performance and longer service life;TIG welding supply better reinforced than regular MIG welding;Powder coated finish for better rust resistance; Thicker solid steel make the suspension kits more durable.
  • 【Tapped Zerk Fitting Holes】The holes for zerk fittings are tapped/threaded for more firm and the zerk will not to fall off. Please note that install the grease fittings before install shackles and add grease to prevent squeaking.
  • 【Easy Installation】The install is pretty straight forward and no welding is required. According to different years of Silverdo 1500, lowering kits will be installed in different direction. If you're not sure, please contact us firstly.
  • 【Sincere Service 】Include 2x Rear Lowering Shackles, 2x grease zerks,Pro Installation Instructions. We offer “30-day refund, 24-month free replacement parts” service. If you have any question, feel free contact us and we will reply within 24h.
Bestseller No. 4
Belltech 1020 Lowering Kit for GM SUV W/Out Mag/Auto Ride 2-4F-4"R, 1 Pack
  • Kit includes Belltech 2514 Drop Spindle Set and Belltech 23323 Pro Coil Spring Set, no shocks
  • Depending on application, this kit provides a 2-4" drop front and 3-4" drop rear
  • Specifically made for your vehicle with guaranteed fitment.
  • This kit is without shocks
  • OEM ride quality with added performance, control and comfort.
Bestseller No. 5
Belltech 1019 Lowering Kit for GM SUV W/Mag/Auto Ride 2-3F-4"R, 1 Pack
  • Available with or without shocks
  • Specifically made for your vehicle with guaranteed fitment
  • OEM ride quality with added performance, control and comfort
  • Premium hardware along with detailed instruction to insure you'll get the job done right the first time
Bestseller No. 6
Touring-Tech Rear Axle Flip 6” Lowering Drop Kit 1999-2006 GM 1500
  • Lowers truck 6” by placing rear axle on top of leaf springs
  • Installation instructions included
  • Lowering shocks or lowering shock brackets recommended
  • Includes lifetime unlimited mileage warranty against manufacturers defect
Bestseller No. 7
Rough Country 2" Front 4" Rear Lowering Kit for 07-15 Chevy/GMC 1500 2WD - 72330
  • Drops the front 2" and the rear 4" for a level drop.
  • Maintains factory ride quality and uses N3 Performance Rear Shocks
  • Includes Grade 9 hardware and hardened washers.
  • Rear drop is adjustable between 4" and 4.5"
  • Backed by Rough Country's Limited Lifetime Replacement Warranty.
Bestseller No. 8
Suspension Spring Kit, 2 in Lowering, 2 Coil Springs, Black Powder Coat, Rear Only, GM A-Body 1964-72 / GM G-Body 1977-88, Pair
  • Package Dimensions: 19.05 cms (L) x 36.322 cms (W) x 44.45 cms (H)
  • Product Type: Auto Part
  • Package Quantity: 1
  • Country Of Origin: United States
Bestseller No. 9
Rough Country 2/4" Lowering Kit for 1988-1998 Chevy/GMC C/K1500 2WD - 725.20
  • Give your C/K 1500 the Perfect Blend of Performance, Protection, and Style from Rough Country.
  • Sturdy Lowering Spindles | Grade 9 Hardware | Strength and Durability | Lowers your Truck Front - 2" / Rear - 4".
  • Premium N3 Shock Absorbers the best in performance for on and off road use.
  • Easy at Home Installation Supported by RC.
  • Backed by Rough Country's Lifetime Replacement Warranty
Bestseller No. 10
Dr.Roc Replacement for Premium Spare Tire Tool Kit with Bag 1999 to 2019 Chevy Silverado Tahoe Avalanche Suburban GMC Sierra Yukon 2002 to 2018 Cadillac Escalade
  • Premium OEM Upgraded Quality Spare Tire Tool: Durable strong rustproof automotive grade steel,tubing instead of soil designed made it more light,not only stong but also convenient.
  • Latest Upgraded Designed with Durable Portable Bag Spare Tire Kit:The latest auto-flex technology make the stainless steel pinball,more prominent、flexible and stable,ensure the extension rods be easier to be installed,disassemble and hold tighter
  • Necessary Silverado Spare Tire Tool Kit: Use to release, lower or raise the spare tire. Compatible with Silverado 1999-2019 // Tahoe 1999-2019 // Avalanche 2002-2013 // Suburban 1999-2019; Sierra (does not include C/K body styles) 1999-2019 // Yukon 2000-2019; Escalade 2002-2019 // Escalade ESV 2007-2019 // Escalade EXT 2007-2013
  • Compatible with Spare Tire Tool for Reference number: 22925281,22925285,22969377,22969370, 20782704,20782706,20782708,23432366,23432339,15854614,15043672
  • The Dr.Roc Advantage:As a main supplier of the major famous retailers of automotive parts and accessories,With the excellent product quality and customer service,we have years automotive parts and accessories leading position

Last update on 2023-01-30 / Affiliate links / Images from Amazon Product Advertising API

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