What safety feature should be present in the truck according to pre-trip inspection guidelines?

A fire extinguisher is an essential safety feature that should be present in a truck according to pre-trip inspection guidelines. This is crucial because in the event of a fire, having a fire extinguisher on board can help control small fires before they escalate into dangerous situations, potentially saving lives and preventing significant damage to the vehicle and cargo.

Pre-trip inspections are designed to ensure that all safety equipment is in working order and easily accessible. While a spare tire is also important for breakdown situations, it does not directly address safety in emergency situations. A GPS system and a TV monitor, while useful for navigation and entertainment, do not contribute to the safety of the vehicle and its occupants during emergencies. Thus, the presence of a fire extinguisher is a vital consideration for safety and emergency preparedness.