GMC Sierra 3500 Valve Seal Set - COMP Cams - Viton, 7mm Valves, 0.426 Inch Guide Diameter - 01–05. This set delivers precise oil control for 2001–2005 6.6L Duramax builds using 7 mm valves and 0.426" guides.

Built from durable Viton, these COMP Cams seals handle heat and diesel fuel/oil exposure while helping reduce oil consumption and guide wear. Sized for 7 mm stems and a 0.426" guide diameter, the set includes 32 seals for a complete refresh on 2001–2005 GM Duramax engines found in the GMC Sierra 3500. Available individually under 534-1; see 533 for 2006–2016 Duramax applications.

Features

• Viton construction for high-temperature and chemical resistance
• Fits 7 mm valve stems
• Matches 0.426" guide diameter
• Set of 32 seals
• For 2001–2005 GM 6.6L Duramax (GMC Sierra 3500)

Have questions about fitment or installation? Call our Austin, Texas shop at 512-982-9393 or our Los Angeles, California area shop at 562-981-6800. We offer installation and customization services at both locations.

Considering multiple items? Contact us for potential shipping discounts. We install on premises at both Austin and Los Angeles locations.

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