Replacement Front Upper Left Control Arm and Ball Joint - The upper control arm connects the wheel hub and the knuckle to the frame of the vehicle along with the lower control arm, it allows the wheels to move up and down precisely. A ball joint connects the control arm to the wheel and it safely allows for pivot movements for a smooth and comfortable ride. Compatible Replacement for Cadillac, Chevrolet and GMC Vehicles - 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Escalade, Escalade ESV | 2007-2013 Escalade EXT | 2007-2013 Avalanche | 2007-2016 Silverado 1500 | 2007-2014 Suburban 1500 | 2007-2016 Tahoe | 2007-2016 Sierra 1500 | 2007-2016 Yukon | 2007-2014 Yukon XL 1500 |. The control arms can be easily located at the front axle attached to frame of the vehicle. Replaces Part# RK80669, 521-023, CK80669, MS50115, MK80669, 15096197, 25812725, CB90267PR, CB90267 commonly found on popular Escalade ESV, Escalade EXT, Silverado 1500, Sierra 1500, Yukon, Yukon XL vehicles including years 07, 08, 09, 10, 11, 12, 13, 14, 15, 16. If you are experiencing clunking noises from the front suspension, excessive vibration on the front of the vehicle then you may have a bad or failing control arm. OEM Fit, Quality, Finish - While this is not a genuine OEM part, it is a direct RK80669, 521-023, CK80669, MS50115, MK80669, 15096197, 25812725, CB90267PR, CB90267 replacement and will look, fit and work exactly like the factory part. This kit includes a castle nut, grease zerk and dust cap for a complete and proper replacement. Ball joints can be accessed by removing a few parts after removing the front wheels. Lifetime Warranty - This upper left control arm and ball joint kit comes complete with a lifetime warranty. If the part ever fails on your 00 F250 Super Duty, 01 F350 Super Duty, 02 Excursion, 03 F450 Super Duty or 04 F550 Super Duty simply contact us for a replacement. Save time and money off of dealer prices by purchasing this part and taking advantage of our warranty. See our website for full details. The upper left control arm connects the wheel hub and the knuckle to the frame of the vehicle along with the lower control arm, it allows the wheels to move up and down precisely. A ball joint connects the control arm to the wheel and it safely allows for pivot movements for a smooth and comfortable ride. This assembly may fail over time and can cause major damage to the vehicle if not properly looked after. If you are experiencing clunking noises from the front suspension, excessive vibration on the front of the vehicle then you may have a bad or failing control arm. Please note alignment should be done after installing for proper vehicle operation. Compatible with the following vehicles: 2007-2016 Escalade 2007-2016 Escalade ESV 2007-2013 Escalade EXT 2007-2013 Avalanche 2007-2016 Silverado 1500 2007-2014 Suburban 1500 2007-2016 Tahoe 2007-2016 Sierra 1500 2007-2016 Yukon 2007-2014 Yukon XL 1500 Replaces part numbers: RK80669, 521-023, CK80669, MS50115, MK80669, 15096197, 25812725, CB90267PR, CB90267 This is a compatible replacement part manufactured by AA Ignition. This upper left control arm and ball joint kit is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this upper left control arm fits.