ReadyLIFT 3.0-Inch SST Lift Kit | Smart Suspension Technology | Tubular UCAs + 1-Ton Ball Joints + TCT Bushings | Magnetic Ride Control Required | 2021–2026 Chevy Tahoe / Suburban / GMC Yukon | SKU: 69-31301

Verified Fitment

Does NOT fit:

• Chevrolet Tahoe or Suburban LS or LT trims — these trims are not equipped with Magnetic Ride Control in the standard configuration
• GMC Yukon or Yukon XL SLE or SLT trims — not equipped with MRC in standard configuration
• GMC Yukon XL 2026 — 2026 Yukon XL is explicitly not supported by this kit
• Any GM SUV with Air Ride Adaptive Suspension — MRC and Air Ride are different systems; this kit is MRC only
• Any GM SUV equipped with GM Super Cruise or GM Ultra Cruise — not compatible
• Chevrolet Suburban or Tahoe LT or LS without confirmed MRC option
• Cadillac Escalade or Escalade ESV — not compatible
• Any application running stock OE wheels — OEM wheels do not provide adequate clearance for this kit's lift height; aftermarket wheels required
• 2021–2026 Silverado/Sierra 1500 trucks — this is a GM SUV-specific kit; do not order for pickup trucks

Magnetic Ride Control identification: MRC is a factory suspension system using magnetorheological fluid-filled dampers that respond to road conditions in milliseconds. It is standard on Premier, High Country, AT4, and Denali trims. To confirm MRC presence, check your window sticker for "Magnetic Ride Control" or look for the MRC sensor visible at each shock body. The key point: standard air-filled strut Tahoes, Suburbans, and Yukons (typically LS and LT) do not have MRC and are not compatible with this kit.

Component Specifications

Why 3 inches — not more: ReadyLIFT explicitly engineered this kit to provide 3 inches of lift "without over-lifting." At 3 inches, the MRC system's damper travel, sensor travel, and suspension geometry remain within a functional range that preserves the plush, controlled ride these vehicles are known for. More lift requires more geometric compromise — ReadyLIFT's SST methodology stops at the point where geometry and ride quality are optimized together.

Rear pre-load spacers — dual function: The CNC-machined billet aluminum rear coil spring pre-load spacers achieve the rear lift while also slightly increasing rear spring rate. This added stiffness counteracts rear sag when the Tahoe, Suburban, or Yukon is loaded with passengers or cargo — preserving a level stance under typical SUV use conditions.

TCT (Terrain Control Technology) pivot bushings: ReadyLIFT's proprietary non-bonded bushing design maintains proper pivot geometry through the full range of suspension travel without the degradation that bonded rubber bushings experience over time. Maintenance-free — no service interval required.

MRC sensor wire relocation: The MRC system uses position sensors at each damper to continuously monitor suspension travel. At 3 inches of lift, the sensor wires are repositioned relative to their factory routing. The included relocation brackets on both driver and passenger sides re-route the sensor wires with adequate slack — preventing strain that could cause sensor damage or MRC fault codes.

What Is and Is NOT Included

ReadyGuard Powertrain Warranty included.

Critical Compatibility

MRC is a mandatory requirement — not a trim name check. The 69-31301 is engineered specifically for the Magnetic Ride Control damper system. Its MRC sensor relocation brackets, strut extension geometry, and calibrated lift height are all designed around the MRC damper's travel characteristics and sensor requirements. Installing this kit on a non-MRC vehicle produces geometry mismatch and leaves the MRC brackets with no corresponding factory hardware.

Air Ride and MRC are two different systems. Some buyers assume Magnetic Ride Control and Air Ride Adaptive Suspension are equivalent or interchangeable terms. They are not. MRC uses magnetorheological fluid-filled shocks with electronic variable damping. Air Ride uses air-spring adaptive suspension. This kit is MRC only. Air-ride-equipped Tahoes, Suburbans, Yukons, and Escalades are explicitly excluded.

Super Cruise and Ultra Cruise incompatibility. GM's hands-free driving systems use a sensor suite calibrated to the factory suspension geometry. ReadyLIFT explicitly excludes these systems from confirmed fitment — the geometry change at 3 inches of lift may affect the forward-facing sensor angles critical to these systems' operation.

Stock OE wheels cannot be used. The lift height and corrected UCA geometry at 3 inches requires aftermarket wheels with appropriate offset. Confirmed tire fitment is based on 285/60R20 on a 9" wheel at +12 offset (no trimming) or 295/60R20 at +12 offset (with trimming). Running OEM wheels with this kit produces clearance conflicts.

2026 Yukon XL is not supported. ReadyLIFT's own source data explicitly excludes the 2026 Yukon XL. All other 2026 platforms (Tahoe, Suburban, Yukon non-XL) are confirmed through 2026.

Installation Notes

Skill level: Intermediate to advanced — 6 hours ±1 hour estimated installation time excluding alignment and wheel/tire assembly. Professional installation strongly recommended given MRC sensor wire management requirements and ADAS implications.

Tools required: Standard suspension hand tools, torque wrench, spring compressor (for strut work), MRC sensor wire management tools.

Post-installation mandatory steps — all four required:

1. Front-end alignment — corrected UCAs directly affect caster and camber; alignment is mandatory before driving at highway speeds. Budget for alignment at the time of scheduling installation.
2. Headlamp aim adjustment — ReadyLIFT explicitly calls this out in their installation advisory. The 3-inch ride height change alters headlamp projection angles. Adjust headlamps after installation for your safety and other road users' safety.
3. ADAS recalibration — if the vehicle is equipped with active or passive safety/collision monitoring systems (camera- or radar/sonar-based), check and adjust for proper function after installation. Some vehicles may require OEM dealer service tools and factory-trained technicians for ADAS recalibration.
4. MRC sensor wire verification — confirm both driver-side and passenger-side MRC relocation brackets are correctly positioned and all sensor wires have adequate slack at full suspension droop before lowering the vehicle.

Tire and wheel test fit: ReadyLIFT's fitment recommendations are based on Wheel Pros wheels and Nitto tires. Due to manufacturer differences in overall diameter, rolling diameter, tread width, and sidewall construction, every tire and wheel combination must be test-fit before final installation.

Ride quality advisory: Installing larger aftermarket tires — particularly E-rated (10-ply) tires vs. factory C-rated (6-ply) tires — will increase perceived suspension stiffness. All-terrain, mud-terrain, and trail-terrain tires produce meaningfully different ride, handling, noise, and fuel economy characteristics compared to all-season OEM tires. Factor tire choice into the overall ride quality expectation.

Common Questions

How do I confirm my Tahoe, Suburban, or Yukon has Magnetic Ride Control?
Check your window sticker for "Magnetic Ride Control" or look for the MRC badge/option. Premier, High Country, AT4, and Denali trims typically include MRC as standard. You can also look for the MRC sensor — a small module visible on the side of each shock body. If you're unsure, text (469) 407-7538 with your VIN and we'll confirm before you order.

Why can't I use my stock OE wheels?
At 3 inches of lift with corrected UCAs, the wheel and tire position shifts relative to the fender and suspension geometry. OEM wheels on this generation GM SUV do not provide the offset required to clear the new UCA position and brake caliper geometry at the lifted height. Aftermarket wheels with a +12 offset are required — confirmed fitment is 285/60R20 on a 9" +12 offset wheel without trimming.

My Yukon has Air Ride — does this fit?
No. Air Ride Adaptive Suspension and Magnetic Ride Control are different systems with different shock, spring, and sensor architectures. This kit is engineered specifically for MRC. Air-ride-equipped Yukons, Tahoes, and Suburbans are explicitly excluded.

Will this affect my GM Super Cruise system?
Yes — GM Super Cruise and Ultra Cruise are explicitly excluded from this kit's confirmed fitment. The forward-facing sensor geometry required for hands-free operation is calibrated to factory suspension height. ReadyLIFT does not confirm compatibility with these systems at lifted height.

Does the rear sag with passengers and cargo after this lift?
No — this is precisely what the rear CNC-machined billet aluminum coil spring pre-load spacers address. They achieve rear lift while simultaneously adding a slight increase to rear spring rate, counteracting the sag that would otherwise occur when the SUV is loaded with passengers or cargo.

What is SST (Smart Suspension Technology)?
SST is ReadyLIFT's engineering methodology for lift kits that correct suspension geometry at the lifted position rather than simply adding lift height. The 69-31301 achieves 3 inches of lift while correcting UCA geometry through new tubular arms with corrected ball joint cup angles, maintaining MRC sensor function through relocation brackets, and calibrating rear spring rate through pre-load spacers — rather than simply lifting with spacers and leaving geometry unchanged.

The Obsidian Take

The 69-31301 is the only lift kit in the ReadyLIFT lineup engineered specifically for the 2021–2026 GM full-size SUV Magnetic Ride Control system — and the MRC-specific engineering is the product.

The MRC dampers on these SUVs adjust damping rates in real time based on road conditions, driver inputs, and load conditions. Generic lift kits that add height without accounting for MRC sensor travel, wire routing, and damper geometry compromise the system's ability to function correctly — producing MRC fault codes, sensor damage, or simply defeating the adaptive damping advantage that makes these vehicles ride the way they do. ReadyLIFT's MRC relocation brackets, geometry-corrected UCAs, and calibrated 3-inch lift height exist specifically to preserve that system.

Three inches is not arbitrary. It's the point ReadyLIFT's engineers identified where lift height, MRC functionality, suspension geometry, and ride quality optimization converge. More lift produces geometry tradeoffs that compromise what makes these vehicles worth lifting in the first place.

The aftermarket wheel requirement deserves planning attention before ordering. A 285/60R20 on a 9" +12 offset is the confirmed no-trimming fitment. If you're planning a specific tire and wheel combination, get the wheel offset confirmed against this spec before purchasing wheels and tires — ReadyLIFT notes that fitment recommendations are based on Wheel Pros wheels and Nitto tires, and manufacturer differences in tire dimensions mean every combination should be test-fit before final installation.

This SKU is for: 2021–2026 Chevy Tahoe and Suburban and 2021–2025 GMC Yukon and Yukon XL owners with confirmed Magnetic Ride Control (Premier, High Country, AT4, Denali or any MRC-equipped trim) who want a complete 3-inch bolt-on lift with geometry-corrected tubular UCAs, 1-ton ball joints, MRC sensor wire relocation, rear pre-load spacers, and preserved factory ride quality — running aftermarket wheels and up to 285/60R20 tires without trimming.

This SKU is NOT for: LS or LT Tahoe/Suburban owners without MRC, SLE or SLT Yukon owners without MRC, Air Ride Adaptive Suspension-equipped vehicles, GM Super Cruise or Ultra Cruise vehicles, Cadillac Escalade or Escalade ESV owners, anyone running stock OE wheels, 2026 Yukon XL owners (explicitly excluded), or Silverado/Sierra 1500 pickup owners.

SAE J2492 Warning
⚠ WARNING: By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this vehicle may handle differently than factory-equipped vehicles. As with any vehicle, extreme care must be used to prevent loss of control or rollover during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling characteristics and are confident of your ability to maintain control under all driving conditions.

Manufacturer Data Disclaimer
Product specifications, fitment data, and feature details are sourced from ReadyLIFT manufacturer documentation and verified third-party technical references current at the time of publication. ReadyLIFT reserves the right to modify product specifications without notice. Confirm MRC equipment, air ride status, Super Cruise/Ultra Cruise status, and model year before ordering. OFAS is not responsible for incompatibility resulting from non-MRC applications, air ride conflicts, Super Cruise compatibility issues, stock OE wheel use, or 2026 Yukon XL applications.

Prop 65 Warning
⚠ WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

Non-Returnable Notice
This item is non-returnable once installed. Verify MRC equipment, air ride status, Super Cruise status, model year, and wheel compatibility before accepting delivery. Questions before ordering? Text (469) 407-7538.