Transient

Google owns YouTube. They don't own Amazon or Apple. I doubt they'd let you use their service to pay a product from a competitor they directly compete with. I could be wrong though.

Only oil leak I've dealt with on my 2020 so far has been the lube tech failing to tighten the oil filter.

Iirc, the 6.2 is known for a squeaky belt. Has the dealer tried to address that issue?

Jarhead, as a Marine veteran myself I know that you are really happy with your purchase because you're complaining. After all, a Marine isn't happy unless they are complaining. Secondly, like all things when there's a technical glitch, call the Chair Force. Seriously though, turn off truck, open door, close door, restart truck, access trailer app. Did that fix it?

Are you sure the sound isn't coming from the collar on the driver side half shaft?

It's not just the winter gas and bigger tires. Winter has cooler air. Cooler air is more sense. The truck is programmed to run a mixture of air to fuel of 14.7 to 1. Therefore, as the air temp is cooler the truck is programmed to utilize more fuel in order to prevent it from running lean. Go to warmer climate, like Arizona or Southern California and you'll see better mpg.

Option 1) Disconnect the wires from the plug, run the plug through the firewall, reconnect wires to plug. Option 2) Cut wires, run wires through firewall, splice wires back together. Personally, I prefer option #1. To figure out how to do I recommend looking it up on YouTube. Those were all separate pieces at 1 time. I see no reason why they can't be disassembled and reassembled.

Just my opinion, but I don't think the service is necessary. Dealer is correct that it shouldn't be used in dry roads, but my understanding of the system is that it won't be damaged. Excessive use would only increase wear. 1800 miles isn't that much, imo. 4 Auto acts like an AWD system. It won't engage the front wheels until the electronic nannies detect the rear wheels slipping. If they try to push back on a refusal ask them if they try selling the same BS to everybody with a Traverse or Equinox. I think that'll drive the point home to them.

I second what 2016 Sierra Owner is saying. GM has some DTCs that'll be temporarily saved, but not show a CEL on the dash. These DTCs will prevent the cruise control from being functional until they clear out. Pulling the negative cable off the battery for about 10 minutes could help. Another option is to clear the codes with a scanner.

Only way I see a truck being started a block away is with the phone app. With that said, I've had the displeasure of pulling 2 vehicles out of traffic because they lost communication with the fob. Both were Dodge/Jeep vehicles, and both had auto start/stop. I recommend getting that battery replaced before you become an obstruction in traffic. FYI, the temporary fix for the Mopars with dead remote was to have the driver walk away with the key while I pressed the ignition start button a few times until a message on the dash showed no remote was being detected. I then had the driver walk back to the vehicle and start it up.

CC in the rain is a rookie move. Try doing it in a blizzard, lol. Note: Nobody should actually try this. Fortunately, if you do, GM has written the cruise control programming so it automatically disengages is the vehicle detects a slipping wheel.

I drove from San Diego to a small town on the Nevada/Arizona border north of Las Vegas back in December. Cruise was set at 78mph (8 over the posted limit), and air conditioning was on. I saw 24.4 mpg on my 2020 Silverado Trail Boss LT with the 6.2 and a few things adding to drag such as tow mirrors and offroad lights. I have a dash camera setup but didn't save the video because i don't care what the nonbelievers have to say, and the numbers are still showing as best mpg in my screens. Unlike a trip from Chicago to Detroit, I had mountains to drive over. Normally Rams are full of bad language when they aren't moving because they're on the side of the road. Must've been a rough trip if the bad language occurred while still doing 70mph. Imo, OP's mpg was average

Last I looked at how mpg ratings are achieved for manufacturers, not for specific gas burning cars, if it's a hybrid or some other form of alternate fuel, such as ethanol, the manufacturer gets awarded as of the alternate fuel vehicle achieves 50% more mpg than it actually did.

You forgot cleaner engine emissions and a revised EPA testing program that makes it more difficult to obtain the inflated numbers your Avalanche was assigned. Yesterday's cars will not achieve the same results as today's cars under the current testing.

Your post is 100% on point. There is something I believe that should be added. Per GM in a document provided through GM Fleet (because that's where police departments purchase their vehicles), the speedometer has a variance of +/-2 mph at 60mph at 72°F. 0.9 mph may not seem like much, but added to the variable it could be the difference between a ticket or no ticket. And, the majority of highway speed limits are north of 60mph. In some states it's as high as 85mph. Buyer beware, and I agree with your point that the benefit may not justify the cost, but that's just opinion and may not be relevant to the purpose of the OP.

I understand legalese is difficult for some people to comprehend. That doesn't mean the statements are canceling each other out.

First, a chip won't void warranty unless the chip is the cause of a failure or problem. A warranty can't be voided for aftermarket products installed, just not honored due to breach of warranty. This is federal law titled Magnuson-Moss Warranty Act. Secondly, dealerships can recalibrate speedometer and computer for other size tires offered on other trims of the same vehicle for the same model year. In your case, yes they can do it. After all, the lift and suspension on the Trail Boss can be installed on all other Silverados 2019+ as a GM Accessory item. It is therefore safe to assume the customer would want to upgrade the wheels and tires to the one on the Trail Boss, too. If the dealership wants to act stupid, go find another dealership. Your cash is just as green at their competition. Their loss is their competition's gain. The best part about stupid people is there's always somebody else smarter than them. Allow them to suffer from their own stupidity instead of trying to fix them. Hopefully at some point Darwin will come along and fix the problem.

CB and GMRS radios now have power, and work through the truck stereo speakers! Complete stealth install inside the cab. Just need to clean a few things up, such as run some loom over the power wires under the cab from the battery, rubber sealant, tuning antennas, location to hang mic when in use, etc. Nothing major. Even the wife is impressed and she doesn't normally care for the things I do.

Sorry I haven't been around for awhile. Been very busy. Wife was deployed May through September. I've worked on this project whenever I could, but it's been very slow going. One of the first things I installed was the antennas, and I've been driving around with them installed for months. I have CB in the middle, GMRS on the left, and HAM in the right. All antennas 40 inches max height. CB and GMRS radios installed under passenger seat. Haven't done the HAM radio yet, but I think it's going under the driver seat. Instead of installing an external speaker for each radio I chose to run a 3 male to 1 female 3.5mm auxiliary cable, which is then picked by a male to 90° make auxiliary cable. The 90° end plugs into the aux port in the center console. When I want to use the radios I can just switch the input in the truck radio screen to hear the 2-way radio comms. As for the mics, they are run from under the seat to under the center console, ran up the back side between air duct tubing and storage bin. I then drilled a hole into the storage bin, used a grommet. Mics are in storage bin and can be pulled out when used. CB is the Uniden CMX760 Bearcat with a President Electronics Mississippi antenna. However, I'm swapping that antenna out with a President Electronics Iowa antenna. I've been having issues with the Mississippi blowing over at freeway speed. The Iowa won't blow over because it doesn't have a hinge. GMRS setup is a Midland MXT575 with the M8dland 6db gain antenna. HAM will be a Yaesu FTM-400XDR with face and mic mounted via seat bolt bracket. HAM antenna is a Comet CA-2X4SR. I've attached a pic of the antennas mounted on the sportbar. Overall height is just under 9 feet, so still good at most fat food drive thrus. As I said, that's with antenna maximum height at 40 inches on top of the sportbar. Ran cables into the same hole in the bar GM ran the brake light wiring, and routed the same direction down the passenger side tubing, into the bed fender and under the truck. I accessed the cab via a rubber plug under the rear seat (likely under the storage bin for many people, just like it was for me). Antenna cables were then run under the carpet towards the front passenger seat where there is already a factory created opening in the carpet for the antenna cables to be run to the back of the radios. I just need to run the power cable I created through the firewall and everything will be fully functional. Hopefully this helps you guys. If you're in Southern California, my GMRS handle is WRUL474. Still working on HAM radio license. I will be moving to the Florida panhandle in the summer.

You may want to check this link out

Add the auxiliary switches for the snowplow prep group. Auxiliary switch 5 is already wired to run a light on the roof. Wiring should already be in the roof. If you're truck doesn't have it already, parts are about $300. Labor for install isn't that bad. Worst part is taking apart the dash. Once that's figured out everything goes together fairly easily. Biggest benefit is having 4 additional auxiliary switches to connect to things. These switches will have their own fuse box under the steering wheel that allows you to move the fuse over 1 slot left or right so they will turn off when the ignition is off, or stay powered on when the ignition is off.

From the owners manual. Hopefully it helps.

The dealership parts department

Please tell us what powertrain is in your truck. We need a starting point to be able to help.

Have you pulled the rotor and checked to see if it's warped? That's the first place I'd look.