Hello all! Hopefully someone can help me with this, I'm trying to figure out if my 2006 mcs has an aftermarket rear sway bar already installed. I'm questioning mine because mine has 3 adjustable holes and I'm under the impression that OEM rear sway bars were not made to be adjustable. Anyone know how I could find out for sure? Thanks in advance guys!

 

3 holes = after market bar
next, get a caliper and measure the diameter to see if you have a 19mm, 20mm, 22mm or 25mm bar - easier than the mathematical pie

 

Awesome thank you for the help! I'll double check it. I'm planning to upgrade suspension and I'd love to not have to pay for that if I already have an aftermarket one!! Lol

 

Yup 3 holes for sure means it's aftermarket. If you post a pic I can even tell you what it is as we've installed every brand you can name.