* 4L60-E: This was the most common automatic transmission. It's a four-speed unit.
* 4L80-E: A heavier-duty four-speed automatic, more likely found in models with larger engines or higher tow ratings.
To know for sure which transmission is in a specific 1994 Suburban, you'd need to check the vehicle's documentation (owner's manual, build sheet) or look at the transmission itself for identification markings (usually found on the transmission case).
