GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Transmission Identification Information
Figure 1:

Toledo or Romulus Build
Object Number: 827727 Size: LF
(1)3 = 2003
(2)Model
(3)Hydra-Matic 4L60-E
(4)Julian Date or Day of the Year
(5)Shift Built, See Shift Build Chart
(6)Serial Number
(7)Case/Pan Frame Rail Location
(7)Case/Pan Frame Rail Location
(8)Optional Transmission ID Location, Tag Is Used as a Back-Up If Unable To Etch Case/Pan Area and To Bar Code Scan
Figure 2:

Ramos Arizpe, Mexico
Object Number: 827728 Size: LF
(1)3 = 2003
(2)Model
(3)Hydra-Matic 4L60-E
(4)Plant of Manufacture, 4 is Ramos
(5)Julian Date or Day of the Year
(6)Shift Built, See Shift Build Chart
(7)Transmission Serial Number
(8)Optional Transmission ID Tag Location, Tag Is Used as a Back-Up If Unable To Etch Case/Pan Area and To Bar Code Scan
(9)Case/Pan Frame Rail Area
(9)Case/Pan Frame Rail Area
Figure 3:

Bar Code Label Contents
Object Number: 827729 Size: MF
(1)3 = 2003
(2)Model
(3)Hydra-Matic 4L60-E
(4)Transmission Asm. as Shipped Number
(5)3 = Model Year
(6)Julian Date or Day of the Year
(7)Letter After Julian Date Identifies the Plant Shift Build, See Shift Build Chart
(8)Bar Code
(9)Serial Number
(10)Broadcast Code
(11)Transmission ID
(12)Build Location Y=Toledo, OH, R=Romulus, MI, 4=Ramos Arizpe, Mexico

Plant and Shift Build Chart

Plant

Build Line

1st Shift

2nd Shift

3rd Shift

Toledo, OH

ML1

J

W

X

ML2

A

C

Not Used

ML3

B

H

Not Used

ML4

S

L

V

ML5

K

E

Z

Romulus, MI

1

A

--

B

Ramos Arizpe, Mexico

1

A

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