Question about 2007 GMC Yukon XL Denali

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The front and rear differentials on my 2007 Yukon Denali (72,000+ miles) have synthetic lube. My dealer recommends that the lubes be changed at about $100 each. The maintenance schedule in the owner's manual does not refer to this. Is changing the lubes necessary?

Posted by Anonymous on


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Not unless you travel in extremely dusty/sandy roads. Most ppl dont change their fluids for the life of their suvs. If you drove thru deep water often i would also change it but the front and rears are sealed and synthetic fluids is man made and takes an extremely long time to break down.

Posted on Apr 28, 2011

Testimonial: "Thank you! After I pointed out that the manual did not cover this, The dealer never mentioned it again. Your answer confirms my thinking. "

  • Anonymous May 03, 2011

    they dont call them stealships for nothing. lol. everyone tries to make a buck off of someone elses lack of knowing. anything else i can help with, let me know, ill do my best



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