To know for sure if a 1999 Suburban transmission will fit your 1996 Tahoe, you must cross-reference the following:
* Transmission type: Both the donor Suburban and your Tahoe need the *exact same* transmission type (e.g., 4L60E, 4L80E). Just the general type isn't enough. You'll find this information on a tag on the transmission itself, or potentially in your vehicle's documentation.
* Engine compatibility: The transmission must be compatible with the engine in your 1996 Tahoe. A transmission from a V8 Suburban might not work with a V6 Tahoe.
* Transfer case (if 4WD): If both are 4WD, the transfer case compatibility needs to be checked.
Without knowing the specific transmission codes from both vehicles, there's no way to definitively answer the question. You'll need to find this information before proceeding with a swap. A parts store that specializes in used transmissions or a mechanic familiar with these vehicles can help you verify compatibility.
