Fabtech K1123M 4" Performance System Chevy 2011-19 2500HD/3500HD 2WD/4WD
Questions about fitment? Live chat or call 866-235-4715
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- Free shippingMost orders $500+
- 30-day returnsSee policy
- Warranty supportWe work with the maker
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
TRU specialist notes
From the Trucks R Us fitment and install team, beyond the manufacturer's information.
- Plan for a professional wheel alignment after installing any lift or leveling kit.
- Going to bigger tires as well? Speedometer recalibration may be needed, and some tire and wheel combinations need trimming. Check the recommended wheels and tires, or ask us before you order.
Specifications
| Brand | Fabtech |
|---|---|
| Part number | K1123M |
| Lift/Drop Height | 4 IN |
| Country of Origin | US |
| Warranty | Lifetime |
| Weight (lbs) | 271.1 |
California Proposition 65 warning applies to this product. www.P65Warnings.ca.gov
Features
- Heavy Duty 1/4? Thick High Arched Crossmember
- Front Differential Skid Plate
- Ductile Iron Steering Knuckles
- Rear Block
- U-bolt Kit
- In-field testing and multiple vehicle fit checks ensure products will fit properly during installation and provide years of trouble free service with superior vehicle ride qualities.
Fitment
| Years | Vehicle |
|---|---|
| 2011-2019 | Chevrolet Silverado 2500 HD 2WD |
| 2011-2019 | Chevrolet Silverado 2500 HD 4WD |
| 2011-2019 | GMC Sierra 2500 HD 2WD |
| 2011-2019 | GMC Sierra 2500 HD 4WD |
Use the fit check above with your truck selected, or ask a specialist if your trim isn't listed.
Installation
Free install support from the Trucks R Us tech team, for you or your shop.
Overview
2011-19 Chevy Silverado 3500HD | GMC Sierra 3500HD 2WD/4WD
Fabtech’s 4″ Performance systems utilize their proven heavy duty construction and design features for a robust suspension upgrade. The 4″ system features high arched lower control arm crossmembers constructed of 1/4″ thick steel for maximum strength. The Fabtech ductile iron steering knuckles retain the near stock track width keeping tires under the fender for a clean appearance. Rear lift is accomplished with a block and u-bolt configuration.
Features
- Heavy Duty 1/4″ Thick, High Arched Crossmember
- Front Differential Skid Plate
- Ductile Iron Steering Knuckles
- Rear Block & U-bolt Kit
Part Numbers
| Qty | Part # | Description |
|---|---|---|
| 1 | FTS21230 | Component Box 1 |
| 1 | FTS21231 | Component Box 2 |
| 1 | FTS21245 | Component Box 3 |
| 2 | FTS6338 | Front Stealth Shock |
| 2 | FTS6019 | Rear Stealth Shock |
– California Prop 65 Warning
-
FOOTNOTES
55. Must use aftermarket 18″ wheels or larger.
60. Fits extended and crew cab models only.
199. Does not fit GMC AT4 or Chevy Trail Boss models.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
Do I need an alignment after installing?
Yes. Any lift or leveling kit changes suspension geometry, so get a professional alignment after installation.
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