Depends on your needs. The Impala would have a warrenty and the Silverado probably does not. Do you need a large suv or would a car do just fine? Which would you get the most use from? The Silveraso can pull a fair size trailor which i would not recommend with the Impala. Do you have something that needs to be towed? Is gas milage a concern? The Impala would get better gas milage than the Silverado. Hope this helps. And of course I personally like the Impala.