MTY55

Mostly only at low speed but Saturday I was on the highway with cruise set to 60 I believe the it was around 1200 RPM I definitely could feel it was only running on 4 cylinders. Just touched the gas pedal and it went back to 8 cylinders.

If if run in L9 everything seems normal no cylinder deactivation and all is smooth.

I'm driving a 23 Denali with a 5.3 10spd. When I'm driving in town in the 25 to 40 mph range, and between 1000 to1500 rpm. I get an annoying low grade vibration and drone sound when it drops out of V8 mode. Sometimes when it drops cylinders and transmission at the same times I get a pretty hard shift and shudder. I was at the dealer the other day and they told me this is pretty much a common occurrence for these newer models. Previously I had a 20 SLT 5.3 10 spd with DFM and that one went through the transition seamlessly I never even knew it was happening. I was talking to a guy the other day he has a 5.3 in an Elevation and he is experiencing the same condition. Just inquiring if this is a widespread flaw in the system.

I'm driving a 23 Denali with a 5.3 10spd. When I'm driving in town in the 25 to 40 mph range, and between 1000 to1500 rpm. I get an annoying low grade vibration and drone sound when it drops out of V8 mode. Sometimes when it drops cylinders and transmission at the same times I get a pretty hard shift and shudder. I was at the dealer the other day and they told me this is pretty much a common occurrence for these newer models. Previously I had a 20 SLT 5.3 10 spd with DFM and that one went through the transition seamlessly I never even knew it was happening. I was talking to a guy the other day he has a 5.3 in an Elevation and he is experiencing the same condition. Just inquiring if this is a widespread flaw in the system.

I find the seats in my 23 Denali are much more comfortable than my 20 SLT

A Kia isn't as desirable as the lug nuts on a Silverado.

I had that happen in my 2020 Sierra and Terrain when I used my phone and google maps via USB. For some reason it overrides the factory navigation. I used to just unplug the SD card then reinsert it and it worked again.

The only ****** I have had with my 23 Denali was the wireless charger didn't work for beans when I got it. A couple weeks later I received a software update. The charger worked fine after that. Along comes the latest two update last week. Messed things up telling me I had flat tires and false tire pressure readings. That seems to be resolved. Now the damn wireless charger is acting up like it did when I picked up the truck. These update are a PITA.

The My GMC showed basically the same as your Chevy app but the right rea was 31psi. Abut a half hour after I got the bad tire pressure I received this

Just got this notification on my phone.

I got another Software Update installation notification this morning. So I did it. I don't know what it actually good it did, but now my tire pressures are showing low on all fours. I just checked them with a reliable pressure gauge. All tires reading 35psi. The My GMC app shows pressure @ 31psi on all four, and the DIC has no reading at all. I'll go out in a little while and see if things straighten out.

Good to hear. Thanks.

Has anyone else seen this lately. I seen a post on the Sierra Owners FB group. This morning I received a text and email stating this. I know there were no flat tires because I was driving. when I stopped I checked the DIC all tires were @35lbs. I just did a software update the other day this may be a glitch. Update GM N23-241156

Must be dustier that we think in WNY. Last October I changed out the filters in the 20 Terrain at 11000 miles and 20 Sierra with 13000 miles both were pretty dirty. Thankfully they were both easy to change.

Wow that looks great. That would make the front of my black 23 Denali pop.