Performance Head Gasket Kit for GMC Yukon (2002-2011) 4.8L 5.3L

Heavy-Duty Multi-Layer Steel Head Gasket Kit for 2002-2011 GMC Yukon (GMT800 / GMT900)

What it Does: The Performance Head Gasket Kit provides a high-tensile combustion seal and complete engine sealing overhaul for 2002-2011 GMC Yukon models equipped with GM Vortec small-block V8 engines to prevent coolant crossover and maintain peak cylinder compression.

The Stock GMC Yukon Cylinder Head Sealing Limitation

Factory Gen III and Gen IV GM small-block V8 engines in the GMT800 and GMT900 Yukon platforms frequently encounter head gasket failure and external fluid weeping over high thermal cycles. OEM composite or standard-grade multi-layer gaskets suffer from localized bore scrub and thermal distortion between the cast-iron engine block and cast-aluminum cylinder heads. Over extended heat cycles, cyclic expansion rates cause the fire ring seal to degrade, leading to combustion pressure entering the cooling jackets, scorched exhaust ports, and valley cover vacuum leaks that trigger unmetered air draw and engine misfires.

The Engineering Solution

This master engine overhaul kit utilizes premium Multi-Layer Steel (MLS) cylinder head gaskets engineered to maintain uniform clamping loads under high cylinder pressures. The embossed outer spring-steel layers are coated with a high-temperature fluoroelastomer (Viton) to guarantee micro-sealing across uneven deck surfaces, preventing fluid migration under severe thermal shock. The complete kit integrates heavy-duty fluoroelastomer valve stem seals, reinforced intake and exhaust manifold gaskets, and high-durometer oil pan and valley cover seals designed to withstand high crankcase pressures and resist petroleum degradation across harsh duty cycles.

What's Included

• 2 Multi-Layer Steel (MLS) Head Gaskets
• 1 Rear Crankshaft Gasket Seal
• 1 Engine Oil Pan Gasket
• 1 Valley Cover Gasket
• Intake Manifold Gaskets
• Exhaust Manifold Gaskets
• Knock Sensor Grommets
• Damping Plug Heads
• Valve Stem Seals
• Fiber Base Plates
• Assorted O-rings and Secondary Gaskets

Technical Specifications

Compatibility

• 2002-2011 GMC Yukon 4.8L OHV V8 (SLE)
• 2002-2011 GMC Yukon 5.3L OHV V8 (SLE, SLT)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 and GMT900 Yukon?

Yes, this is a direct fit for the 2002-2011 GMC Yukon equipped with the GM Vortec 4.8L and 5.3L small-block V8 engines; verify your VIN displacement code prior to installation, as piston rings are not included.

Are new cylinder head bolts or piston rings supplied in this set?

No, this package includes a full engine sealing gasket set only; torque-to-yield (TTY) cylinder head bolts and piston rings must be sourced separately.

The GMC Heavy-Duty Caliber

Built for the punishing demands of full-size towing and continuous payload duty, this engine overhaul sealing system restores commercial-grade reliability to your powertrain, ensuring zero blow-by and leak-free performance under extreme grade-climbing and haul conditions.