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Thank you Furious.. I did not think of it that way. It may be harmful to my Auto 4wd system if that's the case. I'll just hang on to my leftover fluid for the next transmission service. Dexron VI is not expensive anyway. Thanks for the reply.

Hello All, I'm new here at BITOG. This question may have already been answered. I just can't seem to find it. I have a 2018 GMC Sierra 1500 with the 8L90 8 speed transmission. I performed a pan drop filter & fluid change on the transmission. I have some of the Mobil 1 LV ATF HP - Blue label...