Yes, the PCM in your 1996 Cadillac Seville SLS is located under the air filer housing. Please be advised, if you replace your PCM with out properly programing it to your vehicle it may not start.
RepairPal Certified shops can diagnose and repair your 1996 Cadillac Seville. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.