[OkDually]

I ordered a new alternator for my 97 2 door Tahoe and it was different than the one I took out. A previous owner changed the plug and put a 200 amp alternator in. I also have a 94 2door diesel Blazer. The alternator in it matches the new one I bought. Also the alternator in the 94 is on the opposite side of the motor. Is this right? Are the serpentine belts different between a 94 and 97?

Welcome

Along with the upgraded alternator, a set of 2/0 battery cables would go great and the Tahoe electrical system would thank you.
The Alternator and AC compressor switched sides when the OBD2 switch came into play.
Vehicles from 96'+ had their alternators and AC compressors swapped over to the other side to help accommodate things