* 4L60E: This is the most common automatic transmission for that year and model.
* 4L80E: Less common, but possible, especially if it's a heavy-duty or towing package. The 4L80E is a heavier-duty transmission.
To know for sure, you should:
* Check your owner's manual: This is the best source of information.
* Look at the transmission itself: The transmission case usually has an identifying number cast into it. You can then search online using that number.
* Check the vehicle identification number (VIN): A VIN decoder can tell you the original transmission installed.
Without one of these methods, it's impossible to say definitively.
