Flatus

Never mind, I just found it. That is very vague. What is "heavy towing?"

I have never seen that in the owners manual but I certainly have not read every word of it. Where does it say that? I first towed with 800 miles on my truck. I did first oil change at 3300 miles and will be every 5000 miles for remainder of ownership.

I have about 10,700 miles on mine. It has not burned any oil thus far. I think something must be wrong with mine. From what I am reading in this thread and according to GM, it is normal for the 6.6 to burn oil. Something is abnormal with mine. I should make an appointment ASAP to see why mine is not consuming oil.

Mine sounds like that when I unlock and open door but as far as I know it only does it once.

That temperature part of the bulletin is the only part that doesn't make since to me. It hardly gets in to the 40's here much less below freezing. Mine has been making that noise all summer which is 80's and 90's.

https://www.gm-trucks.com/forums/topic/233720-cold-start-noise-on-66-gasser/ There is a video in the linked thread. It is about 8 posts down. The noise I am talking about is at about the 6 second mark in the video.

It's almost always hot here. I hear it everyday.

I don't know. I am friends with the service manager at the dealer. I sat down with him in his office and he looked it up in the system to see if he could find any kind of bulletins describing the noise but he could not. I guess I'm just not going to worry about it for now. If it for some reason gets worse, than I will make plans to leave it with them so they can cold start it.

My 6.6 gas makes the same noise on cold starts. I explain it the same way, sounds like a timing chain rattle. I was at the dealer last week for an oil change and I brought it up but of course they didn't know what I was talking about. I couldn't leave it there for several hours for them to do a cold start to reproduce it.

I tow with cruise set at 65 mph. I rarely ever go over 65. I use tow/haul mode. Transmission stays in 5th most of the time with downshifts to 4th going uphill.

I don't understand how this oil consumption can be considered acceptable. Why do some burn oil and some do not? I am due for my second oil change right now which is a 5000 mile interval for me. I have towed my travel trailer for about 2500 miles of those 5000 miles. I check my oil regularly including today and it has not burned any oil in 5000 miles. I currently have 8300 miles on it. I had first oil changed at 3300 miles.

Anyone have any updates on this? Has anyone actually had this done on a 2022 or gotten any info from GM or a dealer?

I think I'm just too damn lazy to not use cruise.

Looks very good.

I guess I just don't consider this downshifting aggressive at all. It feels just right to me. I had a 2015 F150 with 5.0/6speed and damn!! That thing had some seriously aggressive downshifting in tow/haul mode. I hated it. I just had to quit using tow/haul mode in that truck.

A lot of head and neck movement for me to see around the mirrors.

I do use cruise when traveling but with tow/haul. I set it at 65 mph and you are correct, it will drop to 61 mph before downshifting to get back to 65mph. My transmission temp never goes above 180 while using tow/haul. I kinda think it will get above 180 if not using tow/haul because of the frequent shifting between 5 and 6 but I have not tried for a significant distance.

I did another tow this weekend. I pulled the travel trailer from Biloxi to Starkville which is about 260 miles. I got 8.6 on the way up and 8.3 on the way back down. I tried towing without tow/haul for just a short bit and it seemed to shift between 5th and 6th too often. I put it back in tow/haul and stays in 5th the majority of the time with occasional downshifts to 4th (up hill) which while it is in 4th it will hit about 2800 RPM. I had stated earlier in the thread that it will go over 3000 rpm but I was incorrect on that that. I guess this is just going to be the norm. This is a hilly drive though, constant up and down.

I don't understand the concern here. That downshifting is Tow/Haul doing it's job. This is completely normal.

I'm 5'6" and I have the factory steps and I would say they are perfect for getting in and out. I use a small step stool when checking my oil.

I'd recommend going with 2500 gasser. Makes a huge difference when towing a long travel trailer. All the extra payload capacity makes it worth the change also.

Man, I would hate to see that message. I have not ever noticed my engine temp getting high although I don't pay as close as attention to it as my transmission temp. My trans temp usually stays below 185 while towing.

In this current market I don't believe a newer year model overlap is going to make a difference at all. If you don't buy the one that you ordered, someone else will before it arrives at the dealer.

I'm not sure if your kidding or not. I don't think you can consider a truck that hasn't even been delivered to a dealer yet a "leftover."