GM 8.5 heavy duty differential cover on a white background
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heavy duty GM rear differential protection cover hardware on a white background
GM 8.5 heavy duty differential cover on a white background
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GM 10 bolt nodular iron differential cover on a white background
Silverado Tahoe Yukon rear axle cover back view on a white background
heavy duty GM rear differential protection cover hardware on a white background

Yukon GM 8.5" & 8.6" Rear Differential Cover – 10-Bolt

YUKYHCC-GM8.5-S

$202.35
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Shipping calculated at checkout.

The Yukon GM 8.5" and 8.6" 10-bolt rear diff cover is most common rear axles used on GM trucks, SUVs, vans, muscle cars, and off-road platforms. Known for their compact design, solid aftermarket support, and durability, these axles are frequently upgraded with lockers, lower gears, larger tires, and performance drivetrain components. 

Constructed from thick-wall nodular iron, this cover improves housing rigidity while protecting ring and pinion gears, bearings, and carrier assemblies from severe impacts and off-road abuse. Internal oil-flow shaping promotes improved lubrication circulation and cooling, while the powder coat finish and stainless hardware provide long-term corrosion resistance and durability. Designed for GM 8.5" and 8.6" rear axle applications using the factory 10-bolt cover pattern.

Included Items:

  • GM 8.5" / 8.6" nodular iron differential cover
  • Stainless steel cover bolts
  • Stainless accent plate
  • Magnetic drain plug
  • Magnetic fill plug
Specifications 
  • Fits GM 8.5" rear differentials
  • Fits GM 8.6" rear differentials
  • 10-bolt differential cover design
  • Designed for applications using 5/16" cover bolts
  • Heavy-duty nodular iron construction
  • Black powder coat finish
  • Includes stainless hardware, magnetic drain plug, and magnetic fill plug
  • Bolt-on installation
  • Designed for off-road, towing, street performance, and daily-driven applications
Fitment 

Fits GM 8.5" and 8.6" 10-bolt rear differential applications depending on axle configuration and spline count. Verify axle type and cover bolt size before ordering.

Make Model Year Range
Cadillac Escalade 1999–2002
Cadillac Escalade EXT 2002
Chevrolet Avalanche 1500 2002
Chevrolet Blazer 1972–2002
Chevrolet C10/C1500 1972–2002
Chevrolet C10/C1500 Suburban 1972–1999
Chevrolet El Camino 1972–1987
Chevrolet Express 1500 1996–2002
Chevrolet G10 Vans 1972–1995
Chevrolet K10/K1500 1972–1999
Chevrolet K10/K1500 Suburban 1972–1999
Chevrolet K5 Blazer 1975–1986
Chevrolet P10 Vans 1972–1980
Chevrolet R/V1500 Suburban 1987–1991
Chevrolet Silverado 1995–1999
Chevrolet Suburban 1500 1995–2002
Chevrolet Tahoe 1995–2002
GMC C15/C1500 1972–1999
GMC C15/C1500 Suburban 1972–1999
GMC G15/G1500 Vans 1975–1995
GMC Jimmy 1972–2002
GMC K15/K1500 1972–1999
GMC K15/K1500 Suburban 1972–1999
GMC P15/P1500 Vans 1972–1980
GMC R/V1500 Suburban 1987–1991
GMC Savana 1500 1996–2002
GMC Yukon 1992–2002
GMC Yukon XL 1500 2000–2002
Tech Insight 

The GM 8.5" and 8.6" 10-bolt rear axle platforms are popular because they offer a strong balance of compact size, durability, and aftermarket support. These axles are commonly found in classic trucks, OBS GM platforms, muscle cars, SUVs, and off-road builds running upgraded gearing, lockers, and larger tires.

A heavy nodular iron differential cover helps reinforce the housing while protecting the ring and pinion assembly from impacts and housing distortion. Increased housing rigidity can help maintain more stable gear alignment under towing, street performance, and aggressive off-road conditions.

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