How do I know what transmission is in my 2014 Silverado?
Your 2014 Chevrolet Silverado’s transmission can be identified by checking the transmission itself, the vehicle’s documentation, or the VIN/build data. The factory transmission is indicated by a model code such as 6L80E or 4L60E on the identification tag, the glove box/RPO sticker, or the official build information tied to the VIN.
Inspect the transmission itself
Reading the transmission’s own identification tag is the most direct way to confirm the model. This tag is usually stamped or attached to the side of the transmission housing near the fluid pan or cooler lines. It will display a model code that you can match to GM’s transmission family.
- Park on level ground, set the parking brake, and turn off the engine. If safe, climb under the truck or look from the passenger side to locate the transmission housing along the exhaust/transfer area.
- Find the ID tag or stamping on the transmission case. Common GM codes you might encounter include references like 6L80E, 4L60E, or similar, which identify the automatic transmission family and gear count.
- Note the exact code exactly as printed and compare it to GM’s transmission listings or a trusted parts source to confirm the model.
Knowing the model code from the tag is the most reliable way to determine the transmission, especially if parts compatibility or service notes are important for you.
Check the vehicle documentation and factory codes
Documentation from the factory often lists the original drivetrain and transmission information. If you have access to the glove box sticker or the window sticker, you can extract a transmission-related code or confirmation of the transmission type.
GM RPO/glove box sticker
The glove box or center console often carries the RPO (Regular Production Option) sticker. This sheet lists option codes; some codes correspond to the transmission family. If you find a transmission-related code, you can cross-reference it with GM’s RPO code lists to identify the exact transmission installed at build.
- Open the glove box and locate the small sticker with a grid of option codes (letters and numbers).
- Look for a code that corresponds to the transmission or the drivetrain package, then use an RPO decoder (from GM resources or trusted automotive references) to identify the exact transmission model.
- If you have the window sticker, search the drivetrain or transmission line item for the exact model name or code.
Documentation provides a reliable link to the factory-installed transmission, which is especially helpful if the vehicle has had prior repairs or component changes.
Use the VIN to confirm the transmission
The VIN stores the factory build data for your Silverado. Decoding the VIN or pulling the build data from GM’s resources can reveal the original transmission specification.
How to use the VIN
Find the 17-digit VIN on the driver’s side dash, the driver’s door jamb sticker, or your registration. Use a trusted VIN decoder or contact a GM dealer to retrieve the build data. The resulting information should list the transmission type or the transmission option code that GM installed at the factory.
- Enter the VIN into a reputable online VIN decoder or provide it to a GM dealer.
- Review the returned build data for a line item that names the transmission or provides the transmission option code.
- Cross-check the code with GM documentation to confirm the exact transmission model (for example, 6L80E or equivalent).
Note: If the vehicle has had a transmission replacement or aftermarket work, the current installed unit may differ from the original factory specification reflected by the VIN. A dealer can verify both the original build data and the current unit by inspecting service records and the installed component tags.
When you should ask a professional
Dealer or qualified shop verification
If you’re unsure after checking the tag, stickers, and VIN, contact a Chevrolet dealership or a trusted mechanic. They can pull the exact build data from GM’s system, read the transmission ID tag, and confirm the current unit. This is especially helpful if you suspect a replacement has occurred or if you’re planning maintenance that depends on the correct model identification.
What this means for maintenance and parts
Knowing the correct transmission model ensures you source the right fluids, filters, and service procedures. GM transmissions share design families, but using the correct parts for your specific model helps prevent wear and compatibility issues. If you’re replacing parts or performing a service, have the exact model code handy when ordering parts or consulting service manuals.
Summary
To identify your 2014 Silverado’s transmission, start with the identification tag on the transmission or consult the vehicle’s VIN/build data and factory documentation. The tag or documentation will reveal the transmission model (for example, a GM automatic in the 6L80/4L60 family or similar). If in doubt, a dealership or qualified shop can verify the exact transmission using the VIN and build records, ensuring you have the correct parts and service plan.
