1999 blazer zr2 shift linkage
 

so i just bought my 99 blazer zr2 and the shift linkage is frayed and causing the truck to not shift into park...will a trailblazer shift cable work in my blazer? it has the column shifter 4wd automatic

If by trailblazer you mean the s-series blazer that had the trailblazer option package, then yes, it should work.