Premium 1-Piece Viton Rear Main Crankshaft Seal - Fits Chevrolet C2500 C3500 Kodiak 6.0L 7.4L Big Block 1991-2000 & More

Ensure dry, reliable operation in your heavy-duty GM truck or van with this premium 1-piece Viton rear main crankshaft seal from LowPricedAutoParts – the trusted retailer of automotive parts and accessories dedicated to outstanding customer service. This offset double lip seal (shaft diameter 4.330", seal OD 5.128", width 0.374") is precision-crafted for GM big-block V8 engines, covering both the 6.0L (366 CID) in medium/heavy-duty applications and the 7.4L (454 CID) in light/medium-duty models from 1991–2000, including Chevrolet C2500, C3500, C2500 Suburban, K2500, K2500 Suburban, G30 Van, P30 Van, K3500, Kodiak C60/C70/C6500/C7500, B7, T6500/T7500; GMC C2500, C2500 Suburban, G3500 Van, P3500 Van, K2500, K2500 Suburban and related series. These GM big-block engines provide exceptional low-end torque and hauling power – workhorses for contractors, fleets, towing and commercial use where endurance under load matters most. Whether it's the 6.0L in Kodiak/B7/T-series medium-duty trucks or the 7.4L in C/K-series pickups, Suburbans and vans, the rear main seal can eventually wear, leading to oil seepage, potential low pressure or drivetrain issues. This premium Viton replacement effectively stops those leaks, restoring confident sealing for continued heavy use. Viton elastomer offers superior resistance to extreme temperatures, oils, fuels and chemicals, while the offset double lip configuration enhances protection against loss and contaminants. As a direct-fit upgrade, it ensures proper crankshaft support and engine bay cleanliness during transmission swaps, clutch service, oil pan gasket work or full rebuilds on these durable GM big-blocks. Installation is straightforward for experienced mechanics: Thoroughly clean the crankshaft flange and housing, inspect for grooves or damage (address with polishing or sleeve if required), apply appropriate lube or sealant per GM guidelines, install with correct offset alignment to prevent distortion, reassemble the rear cover with even torque sequencing, and monitor for leaks during initial startup and break-in. Professional assistance is recommended for precise alignment or if questions arise. At LowPricedAutoParts, customer service is our top priority. Message us your VIN, engine code, year, model or any fitment details – our knowledgeable team is ready to confirm compatibility quickly and provide the personalized support you deserve. Shop with confidence knowing you're getting a premium rear main crankshaft seal backed by exceptional service. We're here to help get your Chevrolet C2500, C3500, Kodiak, GMC equivalent or similar 6.0L/7.4L big-block vehicle sealed tight, running strong and job-ready – contact us today!

• Premium 1-piece Viton offset double lip rear main crankshaft seal (shaft diameter 4.330", seal OD 5.128", width 0.374") for GM big-block V8 engines including 6.0L (366 CID) and 7.4L (454 CID) – fits 1991–2000 Chevrolet C2500, C3500, C2500 Suburban, K2500, K2500 Suburban, G30 Van, P30 Van, K3500, Kodiak C60/C70/C6500/C7500, B7, T6500/T7500; GMC C2500, C2500 Suburban, G3500 Van, P3500 Van, K2500, K2500 Suburban and similar trucks/vans; always verify your VIN, year & engine code for exact match on these heavy-duty GM big-block applications
• Viton material with offset double lip design delivers outstanding heat resistance, chemical/fuel compatibility & reliable sealing – prevents rear main oil leaks that can lead to low pressure, contamination or downtime in high-torque, fleet, towing & commercial big-block 6.0L/7.4L engines
• Precision-engineered direct replacement restores secure crankshaft-to-block sealing – crucial during transmission service, clutch jobs, oil pan removal or engine rebuilds to maintain cleanliness & support demanding performance in Chevrolet & GMC work trucks/vans
• High-performance Viton construction resists wear, compression set & harsh conditions for long-term durability – ideal for refreshing the proven GM big-block V8s (including 6.0L medium-duty & 7.4L heavy-duty variants) known for massive torque & longevity
• Professional installation recommended: Clean crankshaft flange & housing thoroughly, inspect for scoring (polish/sleeve if needed), apply assembly lube or GM-approved sealant, align seal with proper offset (no twisting), torque rear cover bolts evenly to specs & check for leaks after break-in
• LowPricedAutoParts delivers fast, expert customer support – send your VIN, year, model, engine details or photos for quick fit verification; our team is committed to exceptional service & helping you get the right premium rear main seal with complete confidence