It fits stock to 6" lifts.

Apoc GMC Yukon / Yukon XL rear adjustable control arms significantly upgrade from stock. Factory controls arms work great with factory-sized tires and suspension, but once you go bigger, you need more robust and longer controls arms to maintain the correct Pinion angle. Apoc GMC Yukon / Yukon XL rear control arms are built to maintain proper suspension and driveline geometry to keep your trig handling like stock but better. When adding any lift to your GMC Yukon / Yukon XL, you change your driveline angles, creating vibration and premature u joint failure. Big tires and big lifts look great but don't sacrifice reliability for looks, upgrade your control arms and drive with ease. Adjustable Controls arms are fully adjustable from stock to 7" of lift, so if you're starting with a mild lift for now but upgrading later, these arms will suit your needs as you add more lift over time.

Parts Included:

• 2 Upper Rear Control Arms
• 2 Lower Rear Control Arms
• Top Quality Polyurethane Bushings
• Heavy Wall Tubing
• Bushing Ends DOM Tubing 
• Uses Factory Hardware
• Grease Fitting For Each Bushing For Long Life

Install Time:

• 3-4 Hours
• Basic hand tools
• Jack and Jack stands.

Control Arm lengths 

If you are upgrading from factory control arms, make sure you set the length to the correct lift size to keep your steering geometry accurate. The larger the lift, the longer the control arms. Don't assume what your lift size is; if you are not sure, contact the lift kit manufacturer to verify your lift size. The Instructions will give you the measurements to set each control arm to match your lift, an alignment is recommended after installation to ensure all alignment angles are proper.