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Old 05-25-2011, 04:33 AM   #3
rcbildr
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Join Date: Sep 2000
Location: Gold Bar, WA
Posts: 1,216
Re: K10 Suburban - What Differential Oil

If your burb has the gov-loc option for the rear end, there is an additive you will need. Last time I bought it, I paid around $10 for it at the dealership. Every diesel burb and truck I've had came with the gov-loc. I used 85W90 gear oil and that additive when I change the fluid in the rear end of my Burb.
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My Projects:
1960 GMC 1/2ton with 305 V6 (daily driver)
1963 Chevy 1/2ton 2wd...converting to 4x4
1967 Suburban 1/2ton 2wd

My Girlfriends Projects
1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver)
1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam
1978 Camaro Z28
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