Help ID Shock 2000 GMC Sierra 2500
 

Posting this for my son who has a 2000 GMC 25000 Sierra. He blew a shock and we're looking to replace all four before the same happens. I can't seem to ID this shock in my searches to replace it or find a comparable that'll match what's on there. This truck sits on a lift, I don't have just how high the lift is. New to the truck, he's 17 and has a grease monkey buddy who can help him install them. Last resort would be to lift it and remove one to measure? Any advice appreciated. Thanks from the Newb.