The Ford F-150 and Toyota Tundra are the only large pickups to earn the top rating of good in the Insurance Institute for Highway Safety’s roof strength evaluation that measures occupant protection in rollover crashes. The Nissan Titan is rated acceptable for rollover protection. The Chevrolet Silverado (and twin GMC Sierra), and Dodge Ram are rated marginal. The ratings apply only to crew cab versions of these pickups.
To measure roof strength, a metal plate is pushed against one corner of a vehicle’s roof at a constant speed. The maximum force sustained by the roof before 5 inches of crush is compared to the vehicle’s weight to find the strength-to-weight ratio. This is a good assessment of vehicle structural protection in rollover crashes.
Insurance Institute for Highway Safety