Interior work on 1994 GMC Sirrra

Hi. I have a 1994 GMC Sierra that I am redoing the interior on
Will a 1999 same make, model, interchange? Thank you!

http://www.classicindustries.com/shop/truck/ I would start here and see if parts cross. I would also check out the truck forums http://www.fullsizechevy.com/forum/projects-builds/projects-builds-restorations/437095-1994-gmc-sierra-c-1500-sl.html