Hello all, thanks for letting me join the site. To get right to it I have a 1999 6.5L diesel suburban 309k on the clock, bone stock. I noticed while walking around the truck recently the pressure coming out of the exhaust pipe at idle was a little more excessive than before. No mods, relocated pmd, no gauges bone stock steady oil pressure of 25psi at idle. Any ideas or concerns I should look out for? Thanks!!!