The 1997 GMC S-15 Jimmy 4x4 most likely had a
700R4 four-speed automatic transmission or possibly a
4L60E four-speed automatic transmission. The 4L60E was a newer, electronically controlled version that started to replace the 700R4 around that time, so it depends on the specific build date and options.
To be absolutely certain, you'd need to check the vehicle's identification number (VIN) or look at the transmission itself for a tag with the model number.
