Mevotech Supreme Suspension Control Arm and Ball Joint Assembly P/N:CMS30121
Keep the front suspension tight and steering precise with the Mevotech Supreme control arm and ball joint assembly, MPN CMS20348. This integrated unit combines the lower control arm with a pre-installed ball joint and installs in the front left (driver-side) lower position as a direct-fit replacement for the 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500, plus the 2007 Chevrolet Silverado 1500 Classic and 2007 GMC Sierra 1500 Classic.
Engineered in-house with application-specific upgrades for high-usage commercial, fleet and passenger duty, this Mevotech Supreme suspension control arm locates the wheel and lets the suspension travel while the ball joint allows steering and up-and-down motion.
If a worn or damaged arm or ball joint is the cause of clunking over bumps, wandering steering or uneven tire wear, this assembly replaces it. Sold individually for the front left lower position.
Interchange: 820-94984B · 520-125
82094984B · 520125 · 19289745 · 12474581 · 12475523 · 12477633 · 12478067 · TC6253 · CB90283 · CB90283PR · CA18040 · CAK620265 · ICA520125 · RK620265 · 30034117 · 12CB50045 · 11631 · 5071176 · X07CJ0365 · CP5032 · TK620265
This part cross-references / interchanges with the following part numbers:
What is the Mevotech Supreme lower control arm CMS20348?
It is a stamped steel control arm with a pre-installed ball joint for the front left (driver-side) lower position, engineered in-house with application-specific upgrades for durability.
Does this fit a GMC Sierra 1500 control arm application?
Yes. It fits the 1999-2006 GMC Sierra 1500 and the 2007 GMC Sierra 1500 Classic, as well as the 1999-2006 Chevrolet Silverado 1500 and 2007 Silverado 1500 Classic, front left lower.
Is the ball joint nut included?
Yes. Mevotech includes a part-specific nylon locking nut to speed up ball joint installation. Consult the vehicle service information for correct torque and any other fasteners needed.
What are signs this control arm may need replacing?
Clunking or knocking over bumps, wandering or loose steering, and uneven tire wear can indicate a worn arm or ball joint. Diagnose the cause before replacing, as these symptoms have other possible sources.
Do I need to replace both sides?
This listing is for the front left lower assembly, sold individually. Replacing the matching right-side arm at the same time is a common best practice for balanced front suspension wear.
WARNING: These products can expose you to chemicals including lead and phthalates, 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.