I wouldn't say they are always free; originally they were a "dealer package" on the car - basically they wanted to charge me $3,995 extra - for tints, wheel locks, all-season floor mats, "pin-striping" (that it didn't need), and some other crap.You got free wheel locks with your Blazer?
I told them no deal then - long story short after the waiting game they threw it all in for free LOL