* Three-speed automatic: This was a common option, especially in earlier model years.
* Four-speed automatic: Also common, especially in later years and with larger engines.
* Manual transmissions: Several different manual transmissions were available, with variations in the number of gears (typically 3 or 4 speeds).
To know the exact transmission in a specific Chevy G20 van, you need to check the vehicle's identification number (VIN) or look at the transmission itself (often visible through the engine bay or beneath the vehicle). The owner's manual for that specific year and model will also list the transmission.
