BDS 4-Inch Lift Kit | FOX 2.5 Performance Elite Coil-Overs | Rear Leaf Springs | Chevy Silverado / GMC Sierra 1500 4WD 2007–2013 | SKU: 186PES

Verified Fitment

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Drivetrain and platform year confirmation are mandatory before ordering. This kit is 4WD only. The 2014 Silverado/Sierra 1500 is a different platform entirely — do not order this kit for a K2-generation truck. Contact OFAS at (469) 407-7538 before ordering if you need help confirming your drivetrain or platform year.

GMT900 Silverado/Sierra 1500 4-Inch Kit Variant Reference

Contact OFAS at (469) 407-7538 to confirm which SKU is correct for your drivetrain, shock preference, and rear system before ordering.

Installation Notes

Skill Level: Advanced. A 4-inch coil-over lift with rear leaf spring replacement on the GMT900 platform requires a qualified suspension shop. Leaf spring replacement is a more involved rear suspension job than an axle block installation — plan accordingly. Do not attempt DIY installation.

Required Tools:

• Full hydraulic lift rated for truck weight
• Coil-over compression tool
• Torque wrench
• Full socket and wrench set
• Leaf spring removal equipment per shop capability

Alignment: Full front-end alignment is mandatory after installation. Do not operate the vehicle on public roads before alignment is completed.

Reservoir Routing: Follow BDS and FOX installation instructions for FOX 2.5 PE reservoir placement. Avoid pinch points and heat sources. Incorrect reservoir routing causes premature shock failure.

Break-In Period: Allow FOX 2.5 PE shocks and new leaf springs to complete the manufacturer-recommended break-in period before aggressive off-road use. New leaf springs require a seating period before reaching rated ride height.

Extended Brake Lines: Verify whether extended brake lines are required for your specific configuration at time of installation.

Torque Specs: Follow BDS-specified torque values included in the installation instructions. Do not substitute generic torque values on a lifted platform.

Tire Fitment: At 4 inches of lift on the GMT900 platform, typical fitment runs 33–35-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

The Obsidian Take

SKU 186PES is the premium-tier leaf spring rear system for the 2007–2013 GMT900 Silverado or Sierra 1500 4WD owner who wants 4 inches of front lift with FOX 2.5 Performance Elite damping and a replacement rear spring assembly. This is the top-tier configuration available for the 4WD leaf spring rear on this platform — FOX 2.5 PE coil-overs with external reservoir up front, replacement leaf springs and FOX PE rear shocks in the back.

The decision between 186PES and 185PSS is the shock tier. Same 4WD platform, same replacement leaf spring rear — the only variable is FOX 2.5 PE versus FOX 2.0 Performance Series. FOX 2.5 PE delivers a larger piston diameter, external reservoir thermal management, and a more refined damping curve. If you wheel hard, tow at or near capacity regularly, or want the top damping tier this platform supports — 186PES is the correct choice. If FOX 2.0 meets your use case and budget, 185PSS delivers the same lift geometry and leaf spring rear at a lower price point.

The decision between 186PES and 184PES is the rear system. Both run FOX 2.5 PE on the 4WD GMT900 platform. SKU 184PES uses a 5-inch axle block rear and 186PES uses replacement leaf springs. Replacement leaf springs deliver a new spring rate, corrected geometry, and better articulation under towing and hauling loads. The 5-inch block raises the axle under the existing factory spring pack without changing the spring rate. For trucks used for towing or heavy hauling, the leaf spring rear is the stronger long-term solution.

This kit is for you if: You own a 2007–2013 Silverado or Sierra 1500 4WD, you want 4 inches of front lift with a replacement leaf spring rear, and you want FOX 2.5 Performance Elite damping — the top tier available for this configuration on the GMT900 platform.

This kit is not for you if: Your truck is 2WD — order SKU 187PES. You want FOX 2.0 instead of FOX 2.5 PE — order SKU 185PSS. You want a 5-inch axle block rear instead of leaf springs — order SKU 184PES. You have a 2014 or newer Silverado/Sierra — different platform entirely, contact OFAS for the correct K2 SKU. You have a 2006 or earlier, or an HD model. Confirm your year and drivetrain before ordering — the kit is non-returnable once installed.

Common Questions

What is the difference between SKU 186PES and SKU 185PSS?
Both kits fit the 2007–2013 Silverado/Sierra 1500 4WD with a replacement leaf spring rear on the GMT900 platform. The only difference is the shock tier — 186PES uses FOX 2.5 Performance Elite with external reservoir and 185PSS uses FOX 2.0 Performance Series. If you wheel hard or tow at capacity regularly, order 186PES. Call (469) 407-7538 to confirm which fits your use case.

What is the difference between SKU 186PES and SKU 184PES?
Both kits fit the 2007–2013 Silverado/Sierra 1500 4WD and run FOX 2.5 Performance Elite on the GMT900 platform. The difference is the rear system — 186PES uses replacement leaf springs and 184PES uses a 5-inch axle block. If you tow regularly or want a new spring rate at the rear, 186PES is the stronger long-term solution. Call (469) 407-7538 to confirm which rear system fits your use case.

What is the difference between SKU 186PES and SKU 187PES?
Drivetrain only. Both kits run FOX 2.5 Performance Elite with replacement leaf springs on the GMT900 platform. SKU 186PES is for 4WD and SKU 187PES is for 2WD. Confirm your drivetrain before ordering — this is a non-returnable error.

Does this fit my 2014 Silverado 1500?
No. The 2014 Silverado/Sierra 1500 is the K2 generation — a different platform entirely. Contact OFAS at (469) 407-7538 and we will identify the correct K2 SKU for your truck.

Does this kit include rear lift?
Yes. SKU 186PES includes replacement rear leaf springs and FOX Performance Elite rear shocks. This is a complete front-to-rear system.

What size tires fit at 4-inch lift on the GMT900 platform?
Typical fitment runs 33–35-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

What warranty covers this kit?
BDS suspension components are covered by the BDS No-Fine-Print Warranty. FOX 2.5 Performance Elite shocks carry a FOX 1-year limited warranty.

Manufacturer Data Disclaimer: Specifications sourced from BDS Suspension product documentation and authorized distributor data. Obsidian Forged Auto Supply is an authorized BDS Suspension dealer. Manufacturer specifications are subject to change without notice.

⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.

⚠️ Non-Returnable Notice: Suspension components are non-returnable once installed. Confirm drivetrain, year, and platform before ordering. Call (469) 407-7538 with any fitment questions before your order is placed.