I'm sure it's been answered a million times and I'm sorry. I can't for the life of me find a post on which MAP sensor fits a gen 4 4.8 stock truck manifold. I'm running low boost so 2 bar will suffice. Sorry for the repetitive post boys...

thanks,
dave

 

A cobalt 2 bar map is very popular. I forget if the mounting hole and clip are the exact same size. Otherwise it's not really an issue to just hide the 2 bar map and run a vacuum line to it and leave the stock map in the manifold.