Z45

You have better chances of picking winning lottery numbers than to know for sure when your vehicle will ship. Your vehicle may ship quickly, it may not. They don't use first in first out methodology as they combine deliveries at the lowest cost. Not to mention holds that may exist for quality control.

It took 6 qts or the mechanic put in 6 qts? Does the dipstick read overfull? You sure its a V6 engine? 4.3L V6 can be confused with 4.8L V8 at times. The owners manual calls for 4.5 qts in the 4.3L V6; 6.0qt in the V8 engines. So it would appear your mechanic is wrong. Show him the owners manual...

Its interesting the failures take some time to occur. You would think part defects would show sooner rather than later My 2021 6.2L just turned 10,000 miles (new 12/20 built 8/20) and no problems so far.

Might be a good idea to remove the box from the tongue so it never happens again.

I have the GM Accessory Tri-Fold (Rev Ind) cover and it does not interfere with the box entry assist handle. I chose the GM because I did not want have to install it. Its a good looking cover and works great for what I need.

No, the same.

The box was on the tongue I presume. Seen someone damage their tailgate (not me) when they forget the gate was down and backed up jack-knifing the work trailer putting a big 'V' in the top of the t-gate. Company trucks and boss was po'd, was new truck.

More facts to the discussion. Power is the speed at which energy is converted, more power generally means higher fuel consumption. More air = more fuel = more power = more speed. I cannot find any data on S&B site that support claims it improves fuel economy. I do find claims by customers BUT this brings to mind this ruling by 'The National Advertising Division of the Council of Better Business Bureaus'; Truth in Advertising: BP v. Royal Purple circa 2009. Look it up...

If you don’t have the knowledge to diagnose what might be wrong then maybe you might be wasting time and money doing the work yourself as you obviously got something wrong. Have no idea what that could but a good brake specialist mechanic probably knows more about brakes than you do.

Don't know if this could be a reason. I was at a friends shop a while back. They are all former GM techs and owners is former parts mngr of defunct Chevy/Olds shop. Their repair shop is an AC Delco authorized parts and service center. They actually are the go-to source for GM dealers needing batteries in this area. Anyhow, it was a newer GM car, 2017ish (not sure of year) and they had a battery tester type device powering the car while they replaced the battery. I asked why they used that and he said, paraphrasing, 'these vehicles can have problems if all power is lost so we keep it powered'. The battery tester machine allows them to do that without any problems. Btw, the battery was in the trunk of this car.

I have owned many vehicles going backs decades and paint was/is always easy to scratch. Its most noticeable on the darker colors but they all will. Its foolish to think they won't. If you don't like it, buy white or silver.

copied this from local GM dealers website........

FYI GM Puts 3.0-Liter Duramax Diesel Engine Assembly on Indefinite Hold https://www.motortrend.com/news/gm-duramax-diesel-engine-production-delay/

Oversize tires are usually much heavier than the tires that come stock, the extra weight and height of the tire will affect performance. The taller the tire, the higher the gear ratio (lower number) will become. Larger tires will also have a larger rotating mass due to the increase in weight. Both of these issues will result in a loss of low end torque. Your engine will have to strain harder to get the wheels rolling at the start. The smaller the engine, the more it will affect performance and put a strain on all components not to mention up-sizing, or installing a taller tire, will lead to a speedometer reading that is slower than your actual speed. This is because a taller tire will have a larger overall circumference, which will cause it to travel more distance per revolution than the original equipment tire.

Trucks don't use a limited slip (aka posi), they use a locker and its DOES NOT require any additive.

If you added big tires that could change the shift patterns and be a reason for higher trans temps, working harder etc.

Its controlled by the ecm and there is no way to change the parameters; Have to live with the way it is. PS, I turn off every start.

Not hay but I saw this last Saturday. I was coming around a corner in rural town (25mph) and saw a pu up ahead half on the road, half off with 4-way flashers on and cargo spilled on the road. As I got closer I see its Blueberries in cardboard cartons in the size stores would buy. Dumb-ass had the Ram pu overloaded with cartons of fresh blueberries and was driving with the tailgate down so as to carry more + he was about 3 courses high the bed sides and he never thought any would spill. When asked what happened, he said "as I rounded the corner stuff started to slide out" duh. I estimated he lost about 1/4 of his load. Ps, he had driven 3 miles from the farm like that and was within eye sight of the store. LOL

Two style options: Regular or Kicker Sound System model

There is a product to fix this, I have it on my truck. https://tailgatefix.com/product/load-stop-lock/

True. the Sierra 1500 Limited model has been introduced for the 2022 model year, and is effectively a carry over of the 2021 Sierra 1500. The new version 2022 is not yet available to order.

Put 500 or 1,000 lbs in the bed and it will ride a little better. 3/4 ton will never ride like a Cadillac and changing shocks will be a waste of money. Try lowering the tire pressure at it likely came with 80psi in the tires assuming carrying max load.

https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1992-Chevrolet-Truck.pdf C/K is the model designation for 2wd vs 4wd C - 2 wheel drive K - 4 wheel drive

X31 is not available on the Denali. I don't think 2022's 1500 are out yet. He could have an AT4 as they ride rough IMO. I test drove one when I purchased my 2021 and did not like it. MRC is no longer a GMC otpion since 2019 model year, this is the ONLY Suspension on the Denali 1500. Bo other GMC Sierra model has this option. Z45 Denali Premium Suspension with Adaptive Ride Control

https://www.gmheritagecenter.com/gm-heritage-archive/vehicle-information-kits.html