Common transmissions found in 1997 Chevy trucks include:
* 4L60E: A very common 4-speed automatic used in many light-duty trucks.
* 4L80E: A heavy-duty 4-speed automatic, more often found in heavier-duty trucks.
* 700R4: A 3-speed automatic, less common in 1997 but possible depending on the model and condition.
* NV3500: A 5-speed manual transmission.
* NV4500: A heavier-duty 5-speed manual transmission.
To determine the correct transmission, you must know:
* The specific model of your Chevy truck (e.g., Silverado 1500, C1500, K1500, etc.).
* The engine size and type (e.g., 4.3L V6, 5.7L V8, etc.).
With this information, you can then consult a repair manual specific to your truck, a parts catalog (like those from GM or a reputable parts supplier), or an online parts database to find the correct transmission. Using the wrong transmission will likely not fit, and even if it *seems* to fit, it could lead to serious mechanical problems.