Product Description
MAHLE GS33678 turbo mounting gasket set delivers OE-level sealing performance for 2001–2010 GM 6.6L Duramax engines. Designed for direct replacement during turbocharger removal or installation, this complete gasket set prevents exhaust, oil, and coolant leaks that can affect turbo efficiency and boost response. Manufactured from high-temperature, multi-layer materials for long-term durability.
Fitment
- 2001–2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
- 2004.5–2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
- 2006–2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LBZ
- 2007.5–2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM
- Includes gaskets and seals for turbocharger mounting locations. Verify configuration before purchase.
What’s Included
- Turbocharger mounting gasket(s)
- Oil feed & drain gaskets
- Coolant line seals (where applicable)
- Misc. turbo hardware sealing washers as applicable to OE design
Cross-Reference / OE Numbers
- GM / ACDelco OE equivalents: 97228933, 97228934, 98062493 (varies by submodel)
- Mahle: GS33678 replaces earlier family turbo mounting kits
Recommended MAHLE Pairings (Internal Links)
- MAHLE VS50595 Valve Cover Gasket Set – 01–10 6.6L Duramax
- MAHLE CS54580 Lower Gasket Set – 01–10 6.6L Duramax
- MAHLE HS54580 Head Gasket Set – 01–10 6.6L Duramax
- MAHLE MS16374 Intake Manifold Gasket Set – 01–10 6.6L Duramax
- MAHLE OS32111 Oil Pan Gasket – 01–10 6.6L Duramax
Why MAHLE
- Engineered for OE-level sealing integrity and material performance
- High-temp multi-layer steel and composite gasket construction
- Direct-fit design simplifies turbo reinstallation and prevents boost loss
Installation Notes
- Clean all surfaces thoroughly before installation
- Torque per factory specs; avoid overtightening small fasteners
- Verify proper oil and coolant line orientation before startup
FAQ
Does GS33678 fit all 2001–2010 Duramax engines?
Yes—this gasket set fits LB7, LLY, LBZ, and LMM variants from 2001 through 2010 6.6L Duramax engines.
Are the turbocharger mounting bolts included?
No—hardware is not included. Gaskets and seals only.
What’s the material type of the gaskets?
High-temperature multilayer steel and composite materials to resist heat cycling and pressure changes.
What’s the GTIN/UPC for this part?
UPC/GTIN-12: 027067453211
Specifications for Mahle GS33678
| Attribute | Value |
|---|---|
| Brand | MAHLE Original |
| Part Number | GS33678 |
| UPC / GTIN | 027067453211 |
| Shipping Info | Ships from CPP Diesel; shipping calculated at checkout. Lightweight gasket set ships flat. |
| 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. |
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Everything I needed
The kit included every gasket I needed for my 2004 2500hd 6.6l.
