Technical Service Bulletin: 2006 Duramax Head Bolt Torque

Reference Number(s): 06-06-01-009, Date of Issue:  April 10, 2006

Affected Model(s): 2006 Chevrolet Silverado; 2006 GMC Sierra; with 6.6L Diesel Engine

LBZ, LLY DIESEL ENGINE REVISED M12 CYLINDER HEAD BOLT FASTENER TIGHTENING SPECIFICATION

SERVICE INFORMATION

This bulletin is being issued to revise the M12 Cylinder Head Bolt Fastener Tightening Specification in the Engine Mechanical sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

SERVICE INFORMATION
Application Specification
Metric English
Cylinder Head M12 Bolt – Angular Tightening Method 1st Step 50 N.m 1st Step 37 lb ft
2nd Step 80 N.m 2nd Step 59 lb ft
3rd Step 60 degrees
4th Step 60 degrees
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