QUIKAG

You made the right call. My Dad got the 3.0 Denali after trading his 6.2 2015 Denali and it’s awesome

I own a 2019 Raptor and my Dad picked up a new 2020 Sierra Denali with the Babymax last week. For your needs/desires, get the AT4 3.0 and don't look back. I love my Dad's new truck. I love my Raptor too, but on the highway it gets 14mpg at 80+mph and sucks premium. My Dad can get double that at sub 80mph on a long trip. Plus, his engine is so fun to drive. It has torque right off idle, sounds cool, and is BUTTER smooth. Yeah, the Raptor is faster and has great power, but it sounds like a goat giving birth. ?

So, I'm a big car guy. I've had numerous 5.3 and 6.2L trucks, last one was an '18 6.2 SLT Z71. A buddy tricked me into trading it for a '19 Raptor, first truck on the dark side. It's alright and a great truck, but the engine note sucks, good power though. Anyway, I digress. So, been working with my Dad on trading his 2015 Sierra Denali 6.2/8speed on a new 2020 Sierra Denali. We drove the Rams and F-150 to be fair, but meh. Nice interior on the Dodge, but crazy valvetrain noise (oiling issue) on remote start of one we drove. Crazy.. F-150 is a good truck obviously, but they weren't discounting much and the Limited was expensive as heck and looked a little boring (i.e. like most F-150's) We went back and forth between the 6.2 and 3.0 numerous times. Well, he picked up his 2020 Sierra Denali 3.0 diesel this past Friday. It's awesome. Unless you are doing high rpm highway pulls and need the top-end acceleration of the 6.2, the 3.0 turbodiesel is freaking fun around town and has more "real world" torque in the rpm range 95% of truck drivers operate. It clicks through the gears in the 10 speed and always stays in the meat of the powerband. It's BUTTER smooth, quiet, and is just a freaking awesome engine. 460lb/ft at 1,500rpm versus same torque at 4,100rpm in the 6.2. Only time you notice the horsepower deficit is full throttle acceleration and racing. Even then, the diesel chugs through the gears and gets up to speed nicely riding that fat torque wave, but it will get pulled by a 6.2 in a race, no question about it. I'm a huge horsepower nut (have owned my now 663rwhp (E85, headers, tune, pulleys) 2010 ZR1 since new and just love hauling butt and think the 6.2 is a top shelf engine. But, the 3.0 turbodiesel is better in 99% of real world situations than the 6.2 in my humble opinion. I'm so glad I talked my Dad into it. Plus, it's $1500 cheaper now which is a nice little bonus. ? Drive one and drive it normally like you would in regular situations and it will feel like the better engine for sure. So smooth and so nice. However, if you hop in a 6.2 and floor it all over town and then hop in the 3.0 and try to floor it all over town, you will be disappointed in the 3.0. Beyond that extreme scenario, the 3.0 turbodiesel will come out the winner IMHO.

I got a Borla ATAK for my ‘18 6.2 Sierra. Damn, it sounds good, but it’s loud. No drone, but you know an exhaust is on the truck ALL THE TIME. Was thinking about putting the stock exhaust back on since I’m 41 and getting old plus I’m an exec level guy at my company and don’t want to look like a jackass. ;) However now that I’ve put 400 miles on it the past two days going to pick up a horse trailer for my wife, I think I like it. It just sounds too badass to take off. Wish a guy was local in DFW with an S-type so I could hear the difference though.

Thank you guys for your reply! It confirms I got screwed a little. I will be paying off this loan ASAP as I don’t owe them any favors at this point. Thanks again!!

I know, but I wanted the $1k down payment assistance. Just wondering if the FI guy charged a higher rate than needed??

Anyone know the GMF rates for September? I financed through GMF to get the $1,000 incentive when I bought my ‘18 SLT on Saturday and was told 6.75% was the best they can do. I have over an 830 credit score so I should have been eligible for the top rate they have. Any info would be appreciated. I plan to refi or just pay it off, but want to know if I got hosed in F&I. Thanks all!

It's good to know quite a few people have a similar issue, but it's a bit concerning no one has a fix?

I run 93 octane, primarily Chevron exclusively, so it's not knock. It's at low rpm under load, but not WOT. Maybe anything between 30-50% of throttle between 2,000 and 2,500-2,800rpm or so. Above that, either the sound goes away or the engine noise drowns it out. It's really not a metallic sound per se, it's more of a tapping noise maybe 2-3 times a second through the above rpm and throttle parameters. It's quite odd and I'd like to get a diagnosis because it makes the engine sound a little lame and one of the main reasons I bought this truck is for that sweet 6.2L motor.

I posted a thread a while back (I can't find it) where I mentioned a slight rattling noise, but it's more a tapping noise under more than light throttle at lower rpm. I was told it might be the heat shield on the exhaust manifold on the passenger side. I was also told, it might be the radiator tank rattling around. I fixed both of those potential issues by taking a screwdriver and pulling the heat shield away from the passenger side exhaust manifold. It did seem pretty close in a few places. I also wedged some duct tape between the radiator tank and the fender and another side. It's snug now. The tank did rattle a little bit when I shook it, so I was hopeful. Unfortunately, both of those attempted fixes didn't work. It's a pretty light tapping noise under moderate throttle at 2,000-2,500rpm or so. It doesn't seem like valvetrain as the motor runs great otherwise. Could it possibly be the VVT???? Any help would be appreciated. Otherwise, the truck has been great, but this tapping noise is a bit of a distraction from otherwise good engine sounds.