* Engine size: (e.g., 2.2L, 4.3L V6) Different engines used different transmissions.
* Transmission type: Was it originally an automatic or a manual? Automatic transmissions have different bolt patterns and input shaft sizes than manuals.
* Specific transmission code: This is a code (usually a series of letters and numbers) found on a tag on the transmission itself. This is the most definitive way to identify the exact transmission.
Once you have this information, you can:
* Look up the transmission code: Use online resources (like parts websites) and enter your Blazer's VIN or engine size. This should provide the correct original transmission.
* Consult a repair manual: A Haynes or Chilton manual for your specific year and model will list the compatible transmissions.
* Check a parts store: Take your vehicle information to a parts store; they can look up the correct transmission for your vehicle.
Trying to install the wrong transmission will likely be impossible, and at the very least, will require significant modification (which may not even be possible). Get the right information first to avoid wasted time and money.
