* 4L60E (4-speed automatic): This was a very common automatic transmission across many different GM vehicles during that era.
* 700R4 (4-speed automatic): This was another popular automatic option, possibly more likely in lower trim levels or specific engine combinations.
* SM465 (5-speed manual): A durable 5-speed manual transmission.
* NV3500 (5-speed manual): Another 5-speed manual option, potentially more common in later years of the C/K generation.
To know for sure what transmission is in a *specific* 1994 Chevy pickup, you'd need to check the vehicle's identification number (VIN) or look under the truck itself at the transmission case for a casting number. The owner's manual would also specify the transmission if you have one.