Last November I bought a Chevy Silverado Upper Control arm to replace one with a ripped grease boot and some play. It was on short notice so I got it from the NAPA CANADA down the road. Based on the blue grease cap some folks said it was probably a Mevotech item. Fast forward to this March, I ordered up a Mevotech control arm from Rock Auto for the other side of the same truck ( passenger side). Sure enough, they are the same ( except for the left/ right configuration.) The boot is also blue and more importantly, the letters cast into the arm are the same. Here are a few photos. Enjoy.