So you're looking to lower your 2014 to 2018 Chevy Silverado or GMC Sierra 1500 but you're not sure what kit or control arms you have? Here is how to determine that so you can order the correct lowering spindles or struts.
GM decided in 2014 to come out with a new Aluminum control arm for their trucks on some models in addition to the standard cast steel control arms. Below is the differences in those 2 control arms. You will also notice the third option which is brand new for the 2016.5-2017-2018 and up trucks. These are known as the AVV code stamped HD control arms.
Cast Steel arms are black with a textured finish
Spindles that will work with these are;
Belltech 2509 (2wd/4wd), 2511 (2wd only)
Maxtrac 101320 (2wd/4wd)
McGaughys 34050 (2wd/4wd)
These were on the following trucks;
2007-16 2wd & 2007-16 4wd
Aluminum arms are silver
Spindles that will work with these are;
Belltech 2514 (2wd/4wd), 2515 (2wd only)
Maxtrac 101520C (2wd/4wd)
McGaughys 34200 (2wd only)
These were on the following trucks;
2016-18 2wd & 2014-18 4wd,
2015-20 Tahoe, Yukon, XL, Suburban
Stamped steel arms are black with a shiny finish
Spindles that will work with these are;
Belltech 2514 (2wd/4wd), 2515 (2wd only)
Maxtrac 101520C (2wd/4wd)
McGaughys 34200 (2wd only)
These were on the following trucks;
2016-18 2wd & 2016-18 4wd