Okay, I found the post about the fleet vehicle arms:
Quote Originally Posted by HighOctaneRacing View Post
Here's the impala police package part numbers for dorman LCAs

Left 521029

Right 521030

They will fit and look exactly the same as OE ones but have a stronger ball joint and stiffer bushings
Has anyone used these? Can someone confirm they will work on a 2000 GTP?