truckguy82

wish they offered this on the 6.2, I'd buy it tomorrow.

Doesn't seem like the best spot lol

Yeah we have two totally black cars, my truck and the wifes rdx. Rdx only sees the standard car wash, truck saw a regular car wash twice in it's life. Not a single noticeable scratch on the rdx, truck looks horrible up close, so many micro abrasions from the wash.

I believe that he's talking about a supercharger belt. The bigger belts reduce slip, but you can't run them unless you adapt some other accessories to the bigger belt size.

The hybrid trucks are mostly for city driving fyi. There sole purpose is to basically regenerative braking, to capture all that energy we use slowing down. If you're cruising down the highway, I doubt there would be much of a difference in fuel consumption.

Put the drive selector in M, then you can put it in m1, m2, m3, m4, etc with the +/- buttons on the shifter. If it goes past 6, you have an 8 speed When in M mode, it just means whatever gear you select is the highest gear it will go in. It's not like typical +/- paddle shifter that will shift on demand like a wanna-be sequential

I'd bet it's just that the heat transfer from the block/head to the coolant is more effective. To watch the water temp climb in the middle of a wot throttle run is impressive to me.

Yes it is the assumption Your assumption is that is does nothing because a few techs looked at it and hooked up a scan tool and didn't notice anything? Do they have a magic dyno at the dealer to tell them there is no horsepower lost? My assumption is 10-15 hp, and I can show you an actual before and after dyno that says it's more than that with a lot less miles.

I just typed this inside a 6.2 slt. On both slt and denali, the 5.3 is standard and the 6.2 is an option

Mag ride is not impressive. Ride quality is about the same, as is handling. The biggest difference I noticed in my mag ride loaner is when you hit a pot hole. With the regular suspension it feels like you hit a cinderblock wall, and then drove over the cinderblocks. In the denali, it feels like a normal luxury vehicle hitting a pothole. I don't believe the actual cost is $10k over a fully loaded slt. I believe it's a few grand, as it should be.

Mag ride and digital gauges

There's guys on audi forums that did before and after dyno's after like 70k miles, one guy with an rs6 made 100whp after cleaning lol. I believe it too, 2000's audi/vw DI had horrible carbon buildup.

Yeah, its not "needed" I'll just be doing it for hp and fuel economy, probably worth about 10-15hp @ 70k On corvette forums a shop did it at like 20k miles ad they claimed it made like 20 more hp. I don't buy that, but I'm sure it has some effect on hp after awhile.

DIY Will be difficult to find someone with enough integrity to do it properly and not drop carbon deposits into the cylinders. It's way easier and faster to do the job and not to care and it's easy to hide.

Gm did a pretty good job with the motor design compared to a few other manufacturers, especially some of the earlier german DI motors. Regardless, I plan to do mine around around 60-75k miles. I'm at 37k now and I don't have any of the symptoms. I'm sure if I took the intake off I'd see carbon buildup though. Too much work to do it frequently. The only real way to do it is to take the intake off and manually clean the intake ports and valves with a wire wheel or media blast. I don't have a catch can though. I do spray sea foam in through the throttle body right before oil changes, doubt that does much though.

This, hvac drain lines clog because over time mildew builds up in standing water. Even if you drain line was 30 feet long with several upward and downward slopes, it would not get clogged like that in 8000 miles on a brand new truck. No way. Btw, a trick some people do with hvac is simply hook up a shop vac to the drain line exit

Yes a 2017 denali without a scratch and 2k miles no doubt has lead a tough life, especially considering all those 10 people who drove it for sure have the mentality of a 20 year old. You also stated it's "often by owners that purchased it used" A complete fabrication Also, you say "But, is it a common design defect which is the responsibility of the manufacturer - No, otherwise every one of them would vibrate and the vast majority of them do not." Oh really, there's no variation in manufacturing that would cause some to vibrate and others to not. Got it. Maybe you can also tell me why 10% of porsche flat 6 engines that weren't meztgers produce from 1999 to 2008 will for no apparent reason have their IMS bearing fail causing full engine replacement. Or why 15% of mercedes 6.3 amg motors produced from '06 - '10 will grenade because of stretching head bolts. Or why some ls7's drop valves. Why did justin from blackbear, who's driven more of these trucks than any of us, tell me "wow your afm activation is smooth" Your stand on the matter is just complete BS and an insult to every person on the forum who's complained about the issue. You clearly see them as being either picky, having improperly used it, or having improperly maintained it. It is simply ludacris that you dismiss 1000's of posts of people complaining about a single problem, all because you haven't experienced it. The viewpoint is just incredibly self centered, immature, and arrogant. You just think they are all idiots. I used to think exactly like you when I was 20, and maybe that's why I have such an issue with it. Then I hit the real world and realized everybody else is not so dumb and to exactly listen to their concerns.

Lol at attorney style defense in this forum. While technically a used vehicle, it's evidence enough in the real world, along with 1000's of other people complaining about it. Most of your post was to invalidate my anecdotal experience as if we are in front of a judge. Well unfortunately my anecdotal evidence, however invalid it may be because of unknown usage during it's extremely long life of a few months and 2k miles, is backed up by 1000's of other pieces of anecdotal evidence, thus turning it into real evidence. Also, there are multiple videos out there with visible shaking, such as cups of liquid vibrating in a cup holder. While you may want to see testing equipment to verify harmonics and physical vibration testing on strictly new vehicles, a sane person would just believe a few thousand people complaining about something is a legitimate source of information. You're basically stating all product reviews and opinions of said products are irrelevant. You may continue on your path of not listening to others without concrete evidence and a large enough data set to verify an actual problem, while the rest of us will go along reading the thoughts of others through forums and product reviews to make our decisions. If you were an actual analytical person, you'd be able to look at the opinions of others and weigh them accordingly. In this particular matter, the opinions are a big ****ing weight.

With the '17 loaner I got, there was no mental aspect to it. It would be immediately noticeable and annoying to every person that's ever driven a car. I'm not sure it can be labeled as a subjective issue. If there is any doubt in your mind that the people complaining about it are being picky and it's not really a big deal, I can assure you the vibration issue is not one of those.

Had a '17 denali loaner with 2k miles on it, vibration at 75mph was night and day compared to my truck. My first experience with the chevy shake issue

Nope its the injector, common issue, just had mine done about a month ago under warranty

Happened to my passenger side, but it had nothing to do with syncing them, needed lubrication. Worked perfectly ever since.

Gmt900 5.3 was 315hp

Thats why I'd never buy a gm truck with the v6 option. While they are fine motors, there are no advantages to it over the v8, not even mpg. Gmt900 was the same way

0-60 is one of the only performance metrics that you can safely achieve Cornering G limits, top speed, 1/4 mile time, 60-130mph time, figure 8, etc all are pretty dangerous. It's why a tesla p100d is one of the fastest cars in the world on the street, but will get left for dead on a circuit course or a texas mile event. It apply's more to sports cars than trucks. It is mostly aimed at those who think 0-60 time is an irrelevant performance metric and is over-used and over advertised.