Final answer:
Before aligning the front wheels on a truck, tire pressure, ride height, and wheel bearing adjustment should be checked, but tire balance does not need to be checked.
Step-by-step explanation:
In the process of aligning the front wheels on a truck, there are several checks that need to be made. These include checking the tire pressure to ensure that it is within the manufacturer's recommended range, checking the ride height to make sure it is equal on both sides of the truck, and checking the wheel bearing adjustment to ensure that it is properly tightened. However, one thing that does not need to be checked before aligning the front wheels is the tire balance.