07-09-2020, 01:39 PM | #1 |
Drives: 18 2LT RS V6 M6 Vert Join Date: Dec 2019
Location: Virginia
Posts: 21
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Rear Diff additive??
2018 V6 M6
Changing the rear diff fluid. Went to the dealer for part number listed in the manual. GM 88862624 Dexron LS Gear oil. Parts told me I also needed an LS additive, GM 88900330. Doesn't the Dexron already have the additive? Manual does not mention the additive (that I can find). Anybody adding this additive? Thanks!! |
07-09-2020, 08:07 PM | #2 |
Drives: 2023 CT5 Blackwing Join Date: Sep 2016
Location: Orlando
Posts: 1,618
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The additive is already in the fluid. You do not need to add more.
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Sold 2023 Wave Metallic CT5-V Blackwing M6 |
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