Yukon GM 14-Bolt Nodular Iron Rear Differential Cover - Metric 8mm Bolts
YHCC-GM14T-M
The Yukon GM 14-Bolt Heavy-Duty Differential Cover replaces the factory rear differential cover with a thick-wall nodular iron design built for added protection and housing support. Designed for late-model GM 10.5" 14-Bolt rear axles using metric 8mm cover bolts, this cover helps protect the ring and pinion, carrier, and differential bearings from trail impacts while adding rigidity to the axle housing. It's a practical upgrade for heavy-duty trucks, tow rigs, rock crawlers, and off-road builds that put more stress on the rear axle.
The nodular iron construction helps resist housing flex under heavy drivetrain loads, while internal oil-flow shaping is designed to support lubrication around the differential components. A black powder-coated finish provides corrosion protection, and the included metric stainless steel hardware, accent plate, and magnetic drain plug complete the package. Whether you're rebuilding a GM 14-Bolt axle or replacing a factory stamped cover, this is a straightforward way to add protection and make differential service easier.
Includes:
- (1) Yukon GM 14-Bolt Nodular Iron Differential Cover
- Metric Stainless Steel Cover Bolts
- Stainless Steel Accent Plate
- Magnetic Drain Plug
Important: Designed for GM 10.5" 14-Bolt rear axle housings using metric 8mm differential cover bolts. Verify the installed axle and bolt size before ordering. Gasket or sealant and gear oil are not listed as included.
Specifications
| Manufacturer | Yukon Gear & Axle |
|---|---|
| Part Number | YHCC-GM14T-M |
| Product Type | Heavy-Duty Differential Cover |
| Axle Platform | GM 10.5" 14-Bolt |
| Ring Gear Diameter | 10.50" |
| Axle Position | Rear |
| Differential Cover Bolt Count | 14 |
| Cover Bolt Size | Metric 8mm |
| Material | Heavy-Duty Nodular Iron |
| Finish | Black Powder Coat |
| Hardware Material | Stainless Steel |
| Accent Plate | Stainless Steel |
| Drain Plug | Magnetic |
| Oil-Flow Design | Internal Oil-Flow Shaping |
| Installation Type | Bolt-On Differential Cover Replacement |
| Primary Application | GM 14-Bolt Rear Differential Protection & Housing Reinforcement |
| Quantity | Sold Individually |
Fitment
Designed for compatible GM 10.5" 14-Bolt rear differentials using metric 8mm differential cover bolts. Verify the installed axle before ordering, as GM used multiple rear axle platforms across these vehicles.
| Make | Model | Year Range | Axle Application |
|---|---|---|---|
| Chevrolet | Avalanche | 2007–2013 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Avalanche 2500 | 2002–2006 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Silverado 2500 | 2000–2004 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Silverado 2500 HD | 2001–2018 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Silverado 3500 | 2001–2007 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Silverado 3500 HD | 2007–2018 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Suburban 2500 | 2000–2013 | GM 10.5" 14-Bolt Rear, Verify Axle |
| Chevrolet | Suburban 3500 HD | 2016–2019 | GM 10.5" 14-Bolt Rear, Verify Axle |
| GMC | Sierra 2500 | 2000–2004 | GM 10.5" 14-Bolt Rear, Verify Axle |
| GMC | Sierra 2500 HD | 2001–2018 | GM 10.5" 14-Bolt Rear, Verify Axle |
| GMC | Sierra 3500 | 2001–2007 | GM 10.5" 14-Bolt Rear, Verify Axle |
| GMC | Sierra 3500 HD | 2007–2018 | GM 10.5" 14-Bolt Rear, Verify Axle |
| GMC | Yukon XL 2500 | 2000–2013 | GM 10.5" 14-Bolt Rear, Verify Axle |
Fitment Notes:
- Fits compatible GM 10.5" 14-Bolt rear differentials
- Requires metric 8mm differential cover bolts
- Designed for late-model metric-bolt axle housings
- Not intended for earlier SAE-thread 14-Bolt housings without confirmed compatibility
- Not interchangeable with GM 11.5" or other differential cover designs without verification
- Verify axle identification, cover bolt pattern, and thread size before ordering
- Vehicle applications are reference fitments; factory axle equipment may vary
FAQ
What is the advantage of a nodular iron differential cover?
Nodular iron provides a rigid, impact-resistant cover that helps protect the differential housing and internal components. Compared with a thin factory-style stamped cover, the thicker construction can provide additional housing support under heavy drivetrain loads and off-road use.
Will this cover fit every GM 14-Bolt rear axle?
No. This cover is designed for compatible GM 10.5" 14-Bolt rear axle housings using metric 8mm cover bolts. Earlier 14-Bolt axles may use different bolt threads, and GM also produced other 14-Bolt differential configurations. Verify the axle and cover bolt size before ordering.
How do I know if my GM 14-Bolt axle uses metric 8mm cover bolts?
Check the existing differential cover hardware and axle identification. This cover is designed for housings with metric 8mm cover bolt threads, not earlier SAE-thread configurations. Do not force metric hardware into a housing with different threads.
Does this differential cover help reinforce the axle housing?
The thick-wall nodular iron construction adds rigidity at the differential cover mounting surface compared with a thin stamped cover. This can help reduce localized housing deflection under heavy drivetrain loads, although overall axle strength depends on the complete housing and internal components.
Does this cover include a magnetic drain plug?
Yes. The included magnetic drain plug helps collect ferrous metal particles in the gear oil and allows fluid to be drained without removing the differential cover.
Does the Yukon GM 14-Bolt cover include mounting hardware?
Yes. The cover includes metric stainless steel mounting bolts, a stainless accent plate, and a magnetic drain plug. Gasket or sealant and gear oil are not listed as included.
Is this differential cover a good upgrade for towing and off-road use?
Yes. A heavy-duty nodular iron cover makes sense for GM 14-Bolt axles used in towing, work trucks, rock crawlers, and off-road builds. It adds protection against impacts while providing additional rigidity around the differential housing.