Here's why:
* Different transmissions were offered: Chevrolet offered several automatic transmissions in the 1989 K1500, including the:
* TH350 (3-speed): This was a common transmission for the earlier years.
* TH400 (3-speed): Also common but offered more torque capacity.
* 700R4 (4-speed overdrive): Introduced around this time, becoming more popular for fuel economy.
* VIN number is the key: The VIN number is unique to your truck and contains specific information about its build, including the transmission.
How to find the VIN:
* Look on the driver's side dashboard: It's usually visible through the windshield on a sticker.
* Check the driver's side doorjamb: It's often located on a metal plate near the door latch.
Once you have the VIN:
* Use an online VIN decoder: Many websites offer free VIN decoding services. These can tell you the specific transmission and other details about your truck.
* Contact your local Chevrolet dealer: They can also help you decipher the VIN and identify the transmission.
