What should you look for on the vehicle's frame during inspection?

When inspecting the vehicle's frame, it is essential to look for cracks, rust, or any signs of damage because these issues can severely affect the structural integrity and safety of the vehicle. A compromised frame may result in instability while driving, which can lead to accidents or further damage to the vehicle. Identifying cracks and signs of rust during a pre-trip inspection allows the driver to address these problems before they escalate, ensuring the vehicle is safe for operation.

While aspects like cleanliness, paint conditions, or alignment with the cab might be noted during an inspection, they are not as critical to the overall function and safety of the vehicle as the structural condition of the frame itself. Therefore, focusing on the presence of any damage or deterioration on the frame is paramount for safe vehicle operation.