* Axle Width: The track width (distance between the wheel mounting points) needs to be the same or very close. A difference here could cause handling problems and potentially damage other components. While both are GM SUVs, there's a chance of slight variations.
* Bolt Pattern: The lug bolt pattern on the axles must match. Again, likely the same but double-checking is crucial.
* Differential Gear Ratio: This affects your vehicle's performance. Ideally, the gear ratio should be the same or very close to the original Tahoe ratio to avoid speedometer and odometer inaccuracies, and to maintain proper drivetrain function.
* Brakes: Brake components may or may not be interchangeable. You'll need to verify compatibility.
* Suspension: The mounting points for the suspension on the rear axle may differ slightly. This could require modification or the use of different suspension components.
In short, while it *might* work, a simple "yes" is irresponsible. You'd need to physically compare the two rear ends side-by-side, or obtain detailed specifications (part numbers) for both to determine compatibility. Even then, professional assessment from a mechanic specializing in these vehicles is strongly recommended. A seemingly small incompatibility can lead to big problems.
