* 4L60E: This 4-speed automatic transmission was by far the most prevalent in the 1994 Suburban.
* 4L80E: This heavier-duty 4-speed automatic transmission was likely found in some higher-output engine or heavier-duty models.
To know for certain which transmission is in *your* specific 1994 Suburban, you need to check the vehicle's documentation (owner's manual, build sheet if available) or look for the transmission identification tag located on the transmission itself.
