* 4L60E: This is the most common automatic transmission for that year and configuration. It's a four-speed electronically controlled automatic.
* SM465: Less likely, but possible, is a manual transmission, specifically the SM465. This was a heavy-duty manual, but less frequently found in the K1500 compared to the 4L60E.
To know for sure, you should:
* Check your owner's manual: If you have it, this will definitively state the transmission type.
* Look at the transmission itself: The transmission case usually has identification markings that indicate the model number.
* Check the VIN: While the VIN doesn't directly state the transmission, a VIN decoder (many are available online) can often deduce it from other VIN data.
Checking the transmission case or using a VIN decoder are the most reliable methods if you don't have the owner's manual.
