This GMC Needs The Best Protection


2018 GMC Sierra 2500 6.6L Diesel 5th Wheel Puller


Currently using AMSOIL 75/90 Gear Oil in front and read diffs

Also protecting engine with AMSOIL Diesel Injector Cleaner


Owner, Larry, Ret. Air Force Vet, plans on changing oil to

AMSOIL Signature 15/40 and using Signature Fuel-Efficint

ATF for best protection ever!!



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