Product Description
MAHLE VS50434 lower rocker (rocker box) cover gasket set restores factory-tight sealing on 2004.5–2010 GM 6.6L Duramax LLY/LBZ/LMM. Built to OE spec with durable steel construction, this direct-fit pair seals the lower rocker cover to the cylinder head to stop oil seepage and keep your bay clean on daily, tow, and work trucks.
Fitment
- 2004.5–2007 Chevrolet Silverado/GMC Sierra 2500HD/3500HD LLY/LBZ 6.6L Duramax
- 2007.5–2010 Chevrolet Silverado/GMC Sierra 2500HD/3500HD LMM 6.6L Duramax
- Also fits equivalent GM medium-duty/van applications using LLY/LBZ/LMM lower rocker covers.
- Location: lower rocker/rocker box to cylinder head (not the upper valve cover gaskets).
What’s Included
- (2) steel lower rocker cover gaskets — one kit services both banks
Cross-Reference / OE Numbers
- GM: 97321295
- Fel-Pro: VS 50681
- Mahle: VS50434
Recommended MAHLE Pairings (Internal Links)
- MAHLE VS50439 Valve Cover Gasket Set – 04.5–10 LLY/LBZ/LMM
- MAHLE VS50550 Valve Cover & Lower Rocker Cover Set – 04.5–07 LLY/LBZ
- MAHLE GS33752 Water Pump Gasket Kit – 01–10 Duramax
- MAHLE F31909 EGR Tube-to-Valve Gasket – 04.5–07 LLY/LBZ
- MAHLE CS54580A Lower Engine Gasket Set – 07.5–10 LMM
Why MAHLE
- OE-grade materials and stamp profile for heat-cycle stability
- Direct-fit geometry for fast installs and leak-free service
- Trusted performance in high-mileage and fleet applications
Installation Notes
- Clean mating surfaces thoroughly; install dry unless GM service info specifies sealant at joints
- Torque fasteners in sequence to spec; recheck after initial heat cycle if required
FAQ
Is this the lower rocker cover gasket or the upper valve cover gasket?
This kit seals the lower rocker/rocker box to the cylinder head. For the upper valve cover, use MAHLE VS50439.
How many gaskets are included?
Two — one per bank. One kit services the whole engine.
What engines does VS50434 fit?
2004.5–2010 6.6L Duramax LLY/LBZ/LMM in Silverado/Sierra HD and related GM platforms.
What’s the UPC/GTIN for this part?
UPC/GTIN-12: 027067720542.
Specifications for Mahle VS50434
| Attribute | Value |
|---|---|
| Brand | MAHLE / Clevite |
| Part Number | VS50434 |
| UPC (GTIN) | 027067720542 |
| Shipping Info | Ships from CPP Diesel; shipping calculated at checkout. Typical flat-pack steel gasket pair. |
| Country of Origin | Not specified |
| Prop 65 | This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
