Transmission Identification Information

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Transmission Identification Information

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Model Year
2	Model Code
3	Transmission Family
4	Transmission Assembly Number
5	Julian date
6	Sequential Serial Number
7	Source Code
8	Broadcast Code
9	Bar Code
10	Transmission I.D.