This is how you beat the GTA 5 Surveying the Score mission. These GTA 5 (GTA V) cheats will give you a full Surveying the Score mission walkthrough and tips.

Play as Trevor and start mission.
Drive to the location and check the front door for any guards.
Change over to Trevor and follow the armored cars. Make sure you use the camera to keep track of them.
If you get too close, you will alert them.
Once the armors cars have passed under the building, lean over the exit. Use the camera tracking to spot them.
Make sure you hover low over the construction site to complete this mission.