rear differential

Hi this is Dusty, I'm one of the auto experts on RepairPal's Car Genius team. It's a possibility that the differential assembly will fit, what may be different though is the gear ratio inside the differential. Manufacturers can make internal changes to suit various engine options, or in some cases pair unique differentials to special powertrains. To be sure though you could call a preferred Cadillac dealer's parts department for more information. They'll be able cross-check the part numbers for each assembly to verify if they're compatible and will be able to confirm if the gear ratio is the same in the 2.5L and 3.6L variants. Whatever the outcome is, be sure to use a differential with the gear ratio that matches your vehicle's specifications, changing the ratio could have an adverse effect on performance and stability control modules. If you have any questions, give us a call at (877) 913-1554