Question about 2007 GMC Yukon XL Denali
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. "
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