In his text messages, Stevie provides some hints of the vehicle's location, with the information in the text, and the image attached is the exact view of where the vehicle is parked at. The range of searching is usually less than a block. If the player finds and get in the right vehicle, the game shows a message saying, "You've found the vehicle Stevie is looking for."
If the delivered vehicles are in perfect condition, the player will receive the maximum price. Minor damages such barely noticeable scratches will not cause a decrease in the vehicle's price. Serious damages such as broken headlights and deformations will significantly reduce the price, however.
The player can also keep the vehicles for themselves by parking them at the parking spaces, as the vehicle will be respawned at the original location as long as the vehicle is not delivered.
Once all thirty cars are delivered, the player can make some extra cash by bringing in any vehicle they want, at varying prices depending on model and condition, much like the original missions. In addition, these prices can reduce if the same model is regularly sold.
The player also earns the achievement/trophyYou Got The Message for delivering all thirty vehicles.
Players can save the vehicle and game at the South Bohan Safehouse which is about one block away from S&M Auto Sales. If the player then loads their latest saved game they'll have a repaired or new version of the car ready to be delivered and a much smaller distance to traverse.
PC users could use a compatible controller with triggers or a steering wheel/pedals, which gives the player more precise and variable control of the vehicle, which just using a keyboard only allows full speed and full steering, making the player have less control and increasing the risk of damage. Another way of repairing the vehicle is by parking the requested car in a safehouse parking space, then driving or running a block or two before returning.
If a player wishes to complete these thefts quickly, it is recommended either that they save the game repeatedly at the nearby safehouse in Bohan, or repeatedly use a Pay 'n' Spray until they receive a text. These methods advance the time, which means Stevie will send a text in a matter of minutes after delivering a vehicle, instead of hours. The player can view the amount of vehicles stolen under "Cars Sold to Stevie" in the Score section of the Stats in the pause menu.
Stevie's garage will appear on the map, but he will not contact you, and none of the cars will be in the listed locations. This glitch effectively prevents the player from being able to achieve 100% Completion.
Some of the cars that had been delivered may still spawn at their respective location.
Map of the locations of cars posted by Stevie himself