Product Description
The GM 11611128 Injector Hold Down Bolt is the OEM fastener designed to properly secure the fuel injector hold-down clamp on 2004.5–2016 GM 6.6L Duramax diesel engines. This precision factory bolt ensures correct injector retention and clamp load to prevent injector movement, compression leaks, and premature injector failure.
When replacing injectors or performing top-end service on your Duramax engine, it is highly recommended to install new OEM hold-down bolts to maintain proper torque specifications and injector sealing integrity.
Fitment
- 2004.5–2005 GM Silverado / Sierra 2500HD & 3500 – 6.6L Duramax LLY
- 2006–2007 GM Silverado / Sierra 2500HD & 3500 – 6.6L Duramax LBZ
- 2007.5–2010 GM Silverado / Sierra 2500HD & 3500 – 6.6L Duramax LMM
- 2011–2016 GM Silverado / Sierra 2500HD & 3500 – 6.6L Duramax LML
- 2006–2016 Chevrolet Express / GMC Savana 3500/4500 – 6.6L Duramax
Why Replace Injector Hold Down Bolts?
- Maintains correct injector clamp torque
- Prevents injector movement under high cylinder pressure
- Ensures proper injector sealing
- Recommended during injector replacement
- Direct OEM GM replacement part
Specifications for GM 11611128
| Specifications for GM 11611128 | |
|---|---|
| UPC | 808709359312 |
| GTIN | 808709359312 |
| Shipping Info | Shipping Weight: 0.10 lb Package Dimensions: 4 in x 2 in x 1 in |
| Prop 65 | WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov |
FAQ
Is this the bolt that holds the Duramax injector in place?
Yes. GM 11611128 is the factory injector hold down bolt used to secure the injector clamp that retains the injector inside the cylinder head.
Should injector hold down bolts be replaced when installing new injectors?
Yes. GM recommends replacing injector hardware during injector service to ensure proper torque and clamp load.
How many bolts are required per engine?
Each injector uses one hold down bolt. Most Duramax engines require 8 bolts total when replacing all injectors.
Will this fit LB7 Duramax engines?
No. LB7 engines (2001–2004) use a different injector retention design. This bolt is used on LLY, LBZ, LMM, and LML Duramax engines.
