C/K Man

You are typical of many medium duty box van users. Good chance GM will have a gasoline engine in the new Silverado 4500/5500/6500 in 2020 or 2021. Not everyone wants a diesel anymore.

Not sure about that. Work an Ecoboost and the fuel economy is worse than a GM 6.2L. There would also likely be durability issues. Fleets like simple and cheap. Not to say forced induction gasoline engines may eventually show up in larger commercial trucks, but the current trend seems to be back to large displacement naturally aspirated. Ford's 7X, GM's 6.0L replacement, and I am now hearing that FCA may be looking at a larger Hemi for the Ram HD's.

Driver's side actuator is on the bottom of the HVAC assembly, above the transmission hump accessible from under the dash. The passenger side actuator is on top of the HVAC assembly. It is accessible by removing the radio. Not too tough, you will see it in there a little to the right.

That depends. If you have the problem described in the TSB, (areas of the wax not sticking to the chassis) GM recommends prepping the surface first. I just apply the coating directly to the frame (after cleaning) for repairing small areas where the coating has rubbed off, ect..

This is the factory coating: https://www.daubertchemical.com/store/product-list/corrosion-prevention/nox-rust-x-121b It actually works very well if you touch it up occasionally.

Looks like a 10.5 to me. 10'5's have a removable pinion bearing retainer. Look for a round bolt-on piece at the front of the axle behind the U-joint.

If the primary application for the rumored new engine will be HD pickups and medium duty trucks, a low r.p.m. large displacement naturally aspirated engine would be the logical choice. Notice that Ford has not offered an Ecoboost engine in any Super Duty? There are good reasons for that.

Plus, GM sells a ton of L96's to other OEM's. But, I think the plan is to offer a gas option in the new medium duty trucks, and it won't be the L96.

The 8.1 has been developed into an 8.8L by PSI engines. It is now sold for industrial applications and International offers it in school buses, both gasoline and propane: www.psiengines.com https://www.icbus.com/bus/buses/school/ceseries I think GM is working on something all-new for their trucks.

Rumors are the gasoline powered 2020 HD trucks seen in the recent spy shots are NOT powered by the L96 6.0L. I personally think that GM wants to offer a gas option in the upcoming 4500/5500/6500 and sees a need for a more powerful gas option in the HD pickups.

I think you have to buy the whole trim panel. What trim level is your truck?

Well off upscale contractors. Lots of them in my area. You have to figure it will cost GMC next to nothing to offer that configuration.

GMAuthority is showing pictures of a 2020 Denali HD regular cab. Great idea, I can see a small market for a truck like that.

Bad photoshop, they just grafted the nose of a 2019 1500 on a 2017 HD Dually.

Looks good to me.