Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003C TAHOE 2WD V8-5.3L VIN TREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/T - SERIAL NUMBER/SITE CODE LOCATIONS/IDENTIFICATION
2003 Chevrolet C Tahoe 2WD V8-5.3L VIN T
A/T - Serial Number/Site Code Locations/Identification
2003 Chevrolet C Tahoe 2WD V8-5.3L VIN TSECTION A/T - Serial Number/Site Code Locations/Identification
File In Section: 07 - Transmission/Transaxle
Bulletin No.: 02-07-30-028
Date: June, 2002
INFORMATION
Subject:
Automatic Transmission Serial Number and Site Code Locations
Models:
2003 and Prior Passenger Cars and Trucks
2003 HUMMER H2
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(R) service transmissions can be either OEM or REMAN. All Goodwrench(R) REMAN transmissions are identified by a green metal tag with the words "Manufactured for GM" except for Allison(R), 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.
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(R) 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.
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.
Allison(R) 1000 Series (OEM) M74
The Allison(R) LCT 1000 automatic transmission ID tag (1) is located on the right (passenger side), just rear of the PTO (power take off) cover.
Use the model number (1), the date of manufacture number (2) and the serial number (3) for reporting purposes. For example: 1000XXXXXYYYYYYYYYY (1000 + 5 characters + 10 characters).
DISCLAIMER
Bulletin No.: 02-07-30-028
Date: June, 2002
INFORMATION
Subject:
Automatic Transmission Serial Number and Site Code Locations
Models:
2003 and Prior Passenger Cars and Trucks
2003 HUMMER H2
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(R) service transmissions can be either OEM or REMAN. All Goodwrench(R) REMAN transmissions are identified by a green metal tag with the words "Manufactured for GM" except for Allison(R), 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.
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(R) 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.
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.
Allison(R) 1000 Series (OEM) M74
The Allison(R) LCT 1000 automatic transmission ID tag (1) is located on the right (passenger side), just rear of the PTO (power take off) cover.
Use the model number (1), the date of manufacture number (2) and the serial number (3) for reporting purposes. For example: 1000XXXXXYYYYYYYYYY (1000 + 5 characters + 10 characters).
DISCLAIMER
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.