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**MJN** · 04-30-2019, 12:07 PM

I use AMSOIL for everything and they have a great lookup tool that will tell you the proper grade and amount of fluid needed for your Yukon XL. They also have filters.
https://www.amsoil.com/lookup/auto-and-light-truck/

Feel free to PM me with any questions as well.

The front should have a drain plug, I always make sure the fill plug comes out before draining anything out. No point in draining it and then finding out the fill plug won't come loose.

04-30-2019, 12:07 PM	#2
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,966	Re: 2012 Yukon XL Denali fluids and such I use AMSOIL for everything and they have a great lookup tool that will tell you the proper grade and amount of fluid needed for your Yukon XL. They also have filters. https://www.amsoil.com/lookup/auto-and-light-truck/ Feel free to PM me with any questions as well. The front should have a drain plug, I always make sure the fill plug comes out before draining anything out. No point in draining it and then finding out the fill plug won't come loose. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com