Nov 25, 2020 · I bought a new 2021 GMC Sierra 1500 AT4 Diesel yesterday and after only having it for not even 5 hours, I went to park in my driveway and had a message "Shift to Park" after shutting it off. I had it in park so I thought maybe it was just a fluke so I turned it back on drove around the block.

Oct 10, 2018 · 3.0 Duramax LM2: Oil Capacity - 7 Quarts DEF Capacity - 5.3 Gallons Oil Filter - PF66 / 55495105 Engine Oil - DexosD 0w20 19370138 Fuel Filter - TP1015 / 23304096 Air Filter - A3244C / 84121219 Front Axle Lubricant: Supplier RPO code SU4 - 10-4091 / 19300457 High Efficiency 75W-85...

Oct 18, 2018 · GM1500Diesel.com is the only community focused on the new 3.0L Duramax platform, covering all GM 1500 series trucks and SUV's.

Mar 10, 2021 · We bought a pre-owned 2020 Silverado with the 3.0 Duramax with 26k miles. Still under factory warranty. Have had the DEF warning about “174 mi until power reduced to 65 mph” pop up three different times but no engine light and DEF is showing 35% to 95% full).

Mar 10, 2025 · 22" wheels on my 2020 1500 Denali 3.0 Liter Duramax short box ... on my 2021 GMC Sierra Denali 3.0 Diesel ...

Jan 14, 2021 · Hello, I have a 2020 GMC 3.0L with aprox 7k miles. While I drove home, kept smelling oil burning. Arrived home and backed into the shop, noticed oil EVERYWHERE on the ground. No engine check lights came on. Towed to dealership. 2-3 quarts low on oil. Transmission had to be removed. Determined to be rear main seal, installed incorrectly at factory.

Oct 9, 2020 · I have a 2020 GMC Sierra 1500 3L Diesel SLT 15,000 miles. "Change oil soon" came up on the dash. I checked the dip stick and there was no oil showing. Went to the dealer and they had never heard of any problems with this engine. Now going through an oil consumption test. Dealer want to check the oil every 1000 miles.

Dec 28, 2020 · I just bought a new 2021 GMC Sierra 1500 Denali 4x4 crew cab and really happy with the power the 3.0 diesel has. I'm concerned about the def fluid since I rarely put over 7,500 miles on my vehicles per year. Is there someway to drain the def tank on the truck so that I can put fresh def fluid...

Jul 30, 2020 · Im looking at a 2020 GMC 1500 Sierra Denali 4x4 short bed which has listed tow capacity of 9,000 lbs. Tested the truck over the weekend and really like it, especially mpg. But looking to buy a 25-30' travel camper that could weigh anywhere between 5,500 - 7,500 lbs dry.

Oct 10, 2018 · Here is the 2021 3.0 Duramax supplement owners manual. Haven't compared both closely, but the 21's manual has a paragraph saying this model does not have the dreaded extended parking shut down timer...