Info - Automatic Transmission Serial Number and Site Code Locations
| Subject: | Automatic Transmission Serial Number and Site Code Locations |
| Models: | 2003 and Prior Passenger Cars and Trucks |
| with North American Automatic Transmissions |
General Motors automatic transmissions fall into two categories: those manufactured "by GM" (OEM) and those manufactured "for GM" (REMAN). Only OEM transmissions are used in the production of new GM vehicles. Goodwrench® service transmissions can be either OEM or REMAN. All Goodwrench® REMAN transmissions are identified by a green metal tag with the words "Manufactured for GM" except for Allison®, 4L30E (Catera) and 5L40E (CTS).
| • | OEM = blue or black tag = "by GM" |
| • | REMAN = green tag = "for GM" (except for Allison®, Catera and CTS) |
Remanufactured Transmission Serial and Site Code Number Locations
Other than the exceptions shown above, all North American Remanufactured transmissions use the same green tag shown below.
Important: When reporting serial and site code numbers, use the top row of characters followed by the bottom row with no spaces between any of these characters. Refer to the example below.
The Allison®-built transmissions, as well as the 4L30E (Catera) and 5L40 (CTS) do not have green REMAN tags. Refer to the appropriate section in this bulletin for each of these transmissions' correct OEM and REMAN serial numbers.
Goodwrench® Transmission Label (green background)
Serial number: 17DPH600103298206
Require all numbers without spaces
OEM Transmission Serial and Site Code Number Locations
Front Wheel Drive Transmissions
The transmission ID tag is usually located on the side of the case facing the rear of the vehicle.
3T40 (OEM) MD9
