MILIPARTS Aluminum Valve Covers for 1999–2008 GM V8 Engines — Set with Gaskets & Hardware

MILIPARTS aluminum valve cover set replaces worn or leaking OEM covers on many 1999–2008 GM V8 engines, restoring a reliable seal and durable finish.

This premium valve cover kit is engineered as a direct-fit upgrade for a wide range of Chevrolet, GMC, Cadillac, Pontiac and related models that use LS-series and other GM V8 platforms. Crafted from aluminum and supplied with gaskets, adhesive, and mounting hardware, the set is intended to meet or exceed original equipment specifications for fit, sealing and longevity. The following details explain compatibility, installation considerations, and the practical benefits you can expect when swapping out old or damaged valve covers.

Which vehicles and engines will these MILIPARTS valve covers fit?

These valve covers are designed for V8 GM engines including LS1, LS2, LS3, LQ4, LQ9, LMT and L59 platforms with displacements from 4.8L to 6.2L. They cover a broad roster of model years and body styles across Chevrolet, GMC, Cadillac, Pontiac, Isuzu, Buick, Saab, Hummer and select workhorse chassis.

• Common Chevy fits: Silverado (1500/2500/3500) 1999–2008, Avalanche, Tahoe, Suburban, Camaro, Corvette and SSR.
• GMC & others: Sierra, Yukon XL, Envoy, Savana, Hummer H2/H3, Isuzu, Buick Rainier, Saab 9-7x, Pontiac G8/GTO/Firebird.
• Engine coverage: LS-series and compatible V8s 4.8L, 5.3L, 5.7L, 6.0L, 6.2L platforms.
• Reference numbers for verification: front left 12570427 and related OE cross-references including 12582224.

How do these covers improve sealing and long-term durability?

The MILIPARTS covers are made from corrosion-resistant aluminum and machined to provide consistent sealing surfaces, helping prevent oil leaks common with aged stamped-steel or plastic covers. Included gaskets and adhesive are selected to work with the cover material and the engine’s sealing geometry.

• Aluminum construction resists warping and corrosion over time.
• Precision-machined mounting faces improve gasket compression and sealing.
• Complete kit includes new gaskets, glue and bolts to ensure a leak-free installation.

What comes in the kit and what should I prepare for installation?

The package contains both left and right valve covers, replacement gaskets, adhesive/sealant and mounting bolts so you have everything needed to replace the covers as a single service operation. Basic hand tools and a clean work area are required; follow torque specifications for fasteners and replace any damaged mounting hardware or PCV components as needed.

• Kit contents: valve covers, gaskets, glue and bolts—ready for direct installation.
• Installation tips: clean mating surfaces, apply sealant where instructed, torque bolts evenly.
• Inspect: PCV fittings, spark plug tube seals and fasteners; replace if deteriorated.

Will these MILIPARTS valve covers match OEM performance?

Manufactured to meet or exceed OEM material and dimensional standards, the covers are intended as functional replacements rather than cosmetic-only parts. They are engineered to provide equivalent sealing and durability when installed correctly, but always verify exact fit against your vehicle’s part numbers before ordering.

• Meets or exceeds OEM specs for fit and sealing performance.
• Cross-referenced to OE part numbers to help confirm compatibility.
• Customer support available for fitment guidance and questions.

Who is this for: This MILIPARTS valve cover set is for owners, mechanics and restoration shops working on GM V8 trucks, SUVs and performance cars from roughly 1999 through 2008 who need a reliable, OEM-replacement-quality valve cover solution. It’s appropriate for repair jobs that require replacing leaking or damaged covers, vehicle restorations seeking durable components, and performance builds where consistent sealing and long-term durability are important.