This will depend first on what type of mount you are using on your truck. Goosenecks will manage heavier weight and provide much better tuning radius than a bumper pull. They will also provide more stable towing by having the wight of the trailer tongue centered in the back of your truck.
Bumper pulls work great but require more attention due to their limited turning radius. Turning too sharp will cause damage to your truck and to your trailer.
If the weight of the trailer tongue is too much based on the specifications of your truck, your trucks bumper will be pushed too far down. The trailer will behave erratically while being towed and excessive tire wear will occur. You could easily lose control of your vehicle and your trailer.
Towing a trailer is serious! Please make sure to always comply with the tow rating of your vehicle.
