GMC is offering a new engine breathing upgrade for the 2025 GMC Sierra 1500, opening up the ... and was one of two parts in the Performance Upgrade Package (RPO code PDM). The Performance Upgrade ...

As far as we can tell, this is a GMC Sierra 1500 Regular Cab with the Standard ... For example, the aftermarket wheel experts over at Miami, Florida-based Vossen have recently given a shout ...