AT4 HD Ron

Goodyear tires are sold. Still have the wheels with Generals, ready to bolt up!

28,000 miles - I have had them on my truck since new.

All sold

Boost Auto Parts has a kit to make this happen and install is a breeze. Very happy with mine!

Same here!

Can this entire page 2 of this thread be deleted since it has nothing to do with the Duramax, and the thread is in the DURAMAX forum?

I ran Rotella T4 in my 2014 and used it on the first oil change of my 2020. Just bought T6 for the 9K mile oil change - I'm sure T4 would have been fine, just seemed like I should use T6 in this expensive of a truck going forward!

I thought the same thing at first, but the usage seems to have normalized after like 6K miles. I don't think the gauge is very accurate and mine definitely was not full on delivery. After getting it topped off, usage and miles per fill up seem very similar to my 2014.

You can definitely just put a switch in. Cut one wire, splice the switch in, and you are done.

You can go with 35x12.50 on a stock truck with stock wheels and have no rubbing. To answer the question a few posts up, your dealer is wrong. Wheels are 8x180 and have been since 2011.

I added them to my 2014 Duramax. On that truck, there was something like 14 different roof wiring harnesses for all of the various options. I am sure the wiring is not just there for you to plug into. I ordered a harness that had the roof marker light option, stripped just that section of the harness out, and ran it along side my existing roof harness. Drilling and caulking was another story, but I did not have any problems in the six years I had that truck. I do know the 2015-current lights are more difficult to drill and mount as they use square holes - the 2014 and prior was simple round holes I did with a drill bit. Good luck - it is not easy and will cost you a lot more than $55!

It's a generic part, not made to "match our trucks". https://gmauthority.com/blog/2019/11/gm-keyless-entry-keypad-gets-new-design-for-2020-model-year/

They should have installed it so that the right edge of the keypad matched the angle of the right edge of the door i.e. consistent measurement from door edge to both top and bottom of keypad. They just angled it too much.