HPG ETM (Electronic Tech Manual) is a visual way to browse for parts online without knowing the exact part number or description of the item. You can start with the type of vehicle you have and then click the section you are working on (transmission, transfer case, geared hub, etc). A visual parts breakdown with the related parts will be displayed showing current availability, price and a link to view more details about the part on the HPG website. From there you can add the item to the cart or save it in your wish list. The published ETM's start with the Humvee ECV/REV (turbo models). They are still a work in progress and we have more pages to finish. The goal is to also have earlier Humvee and the Hummer H1 models as well online soon but there are ALOT of errors to correct in the manuals.