Find another dealer! Last month, I got $63,600 trade in for my 2020 GMC Sierra HD Denali with 11,351 miles and diesel engine for a new 2021 model. KBB shows the median trade in value for your 2020 with a gas engine to be right at $50,000.
Is the Costco discount better than GM employee pricing? I really don't see how that is possible. Investigate. I wouldn't wait. This is the best time to negotiate. The last few days of the year, when dealers are wanting to meet or exceed their year-end sales objective, is the best time to buy.
My truck is white. After washing it and detailing it, the very next day I would always find tiny black spots on it that were stubborn to remove. I've been experiencing these "mysterious tiny black spots" for quite some time and I couldn't figure out where they were coming from. Google and you shall find! https://www.wdbj7.com/content/news/Black-spots-on-your-car-could-be-from-a-nearby-fungus-in-your-mulch-509250841.html
I also have a new 2021 GMC Sierra 2500 HD with the 6.6 liter Duramax engine and I will not use any additive until several hundred miles have been placed on the engine. After 1,000 miles I will "occasionally" use Power Service Diesel Kleen.
Swift is correct. When I bought my 2020 GMC Sierra Denali HD last December, I thought it had Adaptive Cruise Control. I kept trying to figure out how to engage it on the two hour drive home from the dealer. A disappointment for sure since I had it on a 2017 Yukon Denali and a 2019 Jeep Grand Cherokee. It is one option that I miss.
I've had several 2500 and 3500 GM trucks since 2005. Personally, I prefer the AutoTrac transfer case. The 2020 GMC Sierra HD Denali that I currently own has it and it is the first 2500 I've owned that has it. I have no information if it is more reliable or rugged than the regular four wheel drive transfer case, but I know that I don't like the "bucking" that occurs when turning the steering wheel when in four wheel drive with the old transfer case.
I think 7 and 1/2 gallons is too much for a 2,000 mile trip. I traveled to New York last month, almost 2,000 miles there and back, and only used about 4 gallons. What really blows my mind is how a mixture of urine and water costs more than diesel fuel.
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