* Check the VIN (Vehicle Identification Number): The VIN contains a code that indicates the transmission. You can find your VIN on your dashboard (usually visible through the windshield), your driver's side doorjamb, and on your insurance card. Use a VIN decoder website (many are free) to look up the transmission type using this code. This is the most reliable method.
* Look under the hood: The transmission type is sometimes stamped on a tag on the transmission itself. This can be difficult to see and reach, however. You might need a flashlight and possibly even get under the truck for a clearer view. Look for markings near the bell housing.
* Check the owner's manual: If you have the original owner's manual, it should specify the transmission type.
* Examine the shifter: While not definitive, the shifter itself offers some clues. A 4-speed automatic will have fewer positions than a 5-speed manual or a 4L60E (4-speed automatic with overdrive). However, this is unreliable as an identifying method on its own.
* Consult repair manuals: Repair manuals specific to your year and model of truck will detail the transmission options and how to identify them.
The most common automatic transmission in a 2000 Chevy 1500 2WD is the 4L60E. However, there's a slight chance it could have a different transmission, making checking the VIN the most reliable approach.
