Rear Diff Fluid Change?
As for every 10,000 miles.. I haven't heard any given distance and would be interested to know this also.
As for the additive, you should go to your gm dealer and get the best stuff they have... none of that synthetic stuff.
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Also, is the RTV silicone aright to use to reseal the drain plug and differential cover? im also planning on using brake fluid to clean in and out the differential cover.
Does anyone know if stealerships keep the additive in stock? I hope so, i want to do this **** tomorrow!
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And as far as miles go I changed mine the first time at 18K and the fluid looked new still. But I think that if you did it every 10K it would be good but I dont think thats its nesessary to do it that frequent. But then again Im the type of guy that likes to change the Oil every 2500 miles LOL.



