Performance Engine Rebuild Re-Ring Kit for GMC Sierra (1999-2013) 4.8L 5.3L

Heavy-Duty Performance Engine Rebuild Re-Ring Kit for 1999-2013 GMC Sierra (GMT800 / GMT900)

What it Does: The Performance Engine Rebuild Re-Ring Kit restores combustion sealing, corrects oil consumption, and refreshes the rotating assembly bearings on 1999-2013 GMC Sierra 4.8L and 5.3L V8 engines.

The Stock GMC Sierra Ring Pack & Bearing Degradation

Factory Gen III/IV Vortec small blocks frequently suffer from blow-by, ring-land carbon fouling, and loss of crankcase vacuum over extended service intervals. OEM graphite and single-layer gaskets break down under repeated thermal cycling, while standard bi-metal rod and main bearings develop micro-galling and low oil pressure conditions under sustained towing loads and high oil temperatures.

The Engineering Solution

This master overhaul assembly addresses these vulnerabilities by pairing ductile-iron and moly-faced piston rings with premium tri-metal connecting rod and main bearings (CB-663, MS2199) for high-load durability. The package replaces leak-prone seals with Multi-Layer Steel (MLS) head gaskets engineered to withstand extreme cylinder pressures, viton-jacketed rear main and front timing cover seals, and high-temp fluoroelastomer valley pan and oil pan seals to guarantee zero oil weepage.

What's Included

• 1 Gen III Valley Cover Gasket 12558178
• 2 LS1/LS2/LS3 Header Gaskets
• 1 LS Oil Pan Gasket
• 2 LS Water Pump Gaskets
• 1 LS Front Cover Gasket
• 2 LS Valve Cover Gaskets
• 1 LS Damper Seal
• 1 LS Rear Cover Gasket
• 1 Rear Main Seal
• 4 Water Crossover/Block Off Gaskets 12551933
• 1 Oil Filter Adapter Bypass Gasket 12611384
• 2 Knock Sensor Grommets 12558177
• 2 Multi-Layer Steel (MLS) Head Gaskets
• 1 Bolt Kit
• 1 Piston Rings Set
• 1 Main Bearings & Connecting Rod Bearings Set

Technical Specifications

Compatibility

• 1999-2013 GMC Sierra 1500 4.8L V8
• 1999-2013 GMC Sierra 1500 5.3L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 / GMT900 Sierra?

Yes, this is a direct fit for the 1999-2013 GMC Sierra equipped with 4.8L and 5.3L engines; piston rings will not fit 6.0L (LQ4, LQ9, LY6, L96) or 6.2L applications, and intake manifold gaskets are not included.

Are intake manifold gaskets included in this overhaul package?

No, intake manifold gaskets are not included and must be sourced separately based on your specific cathedral or rectangular port intake configuration.

The GMC Heavy-Duty Standard

Built to endure relentless payload demands and harsh thermal cycles, this rotating assembly overhaul kit delivers the structural integrity and high-torque sealing needed for heavy towing and severe fleet service.