GM 11610681 CYLINDER HEAD BOLT FOR 2001–2016 GM 6.6L DURAMAX (LB7 LLY LBZ LMM LML)

GM 11610681 Duramax head bolt, 6.6L Duramax cylinder head bolt, LB7 LLY LBZ LMM LML head bolt, OEM GM Duramax fastener, Duramax torque to yield head bolt replacement

The GM 11610681 Cylinder Head Bolt is a genuine OEM fastener designed to secure the cylinder heads on 2001–2016 GM 6.6L Duramax diesel engines. These factory bolts are engineered to deliver the precise clamping force required to properly seal the cylinder head gasket and maintain combustion pressure under heavy diesel loads.

Duramax engines use torque-to-yield (TTY) head bolts, meaning they stretch slightly during installation to maintain consistent clamping pressure. Because of this design, GM recommends replacing head bolts during head gasket or cylinder head service to ensure reliable sealing and long-term durability.

Whether you're performing a Duramax head gasket repair, engine rebuild, or top-end service, the GM 11610681 head bolt ensures OEM reliability and proper installation torque specifications.

Fitment

• Engine: GM 6.6L Duramax Diesel
• Years: 2001–2016
• Engine Codes: LB7 / LLY / LBZ / LMM / LML
• Application: Cylinder Head Bolt
• Location: Cylinder Head Fastening Hardware
• Type: Torque-to-Yield (TTY)

Specifications for GM 11610681

FAQ

Yes. Duramax engines use torque-to-yield head bolts that stretch during installation. GM recommends replacing them whenever the cylinder heads are removed.

Each Duramax cylinder head typically uses 18 head bolts. When servicing both heads you will normally need a complete set.

No. Because they are torque-to-yield fasteners, reusing them can result in improper clamping force and possible head gasket failure.

For high horsepower or boosted applications many builders upgrade to performance head studs. However, OEM GM head bolts are ideal for stock or mild performance builds.