| Subject: | Revised Cylinder Head M12 Bolt Fastener Tightening Specifications | 
| Models: | 2001-2002 Chevrolet Silverado | 
 | with 6.6L Duramax™ Diesel Engine (VIN 1 - RPO LB7) | 
 
This bulletin is being revised to inform dealerships that service information is no longer correct. Refer to Service Bulletin 07-06-01-009 for head gasket identification and head bolt torque specifications. Please discard Corporate Bulletin Number 02-06-01-036
(Section 06 -- Engine/Propulsion System).
Notice:  If a cylinder head gasket is found to be absent of thickness grade markings, refer to Service Bulletin 07-06-01-009 for gasket identification.
The revised head bolt specification can be found in SI or refer to Service Bulletin 07-06-01-009 for head bolt torque specification change.