Way to unlock: You need to complete Main mission 11 (Casing the Jewel Store) and select the Smart variant towards its end. After you receive a message from Lester, there will appear the Hs icon on the world map, which symbolizes the pest control service van.
Playable characters: Michael
Additional information: this is the first one of the short missions connected with the smart heist variant. I recommend that you complete it without raising alarms, especially that it is going to be easy to pull off.
The van that you need to steal is parked in the harbor (Elysian Island), in the southern part of Los Santos. Reach the region of the warehouse's entrance, where the vehicle is but, do not go into the main entrance of the building, because you would alarm unnecessarily the employees, as well as a nearby guard.
Walk around the warehouse to get to the back of the building. Get out of your car, enter the sneak mode and approach, carefully, the employee shown in the above screenshot. Attack him from behind and knock him down without raising the alarm. You can now get into the van (Declasse Burrito).
There is one more action to do, which is delivering the stolen van to the garment plant region. Rev up the van to prevent being spotted while leaving the harbor and, after you get to your destination, park the vehicle under the bridge. Attention - if, for any reasons, you don't want to stun the bug exterminator (getting rid of him doesn't block a chance for completing mission in 100%), you can sneak into the van parked in the right corner of the storehouse and break in. In this case, ride out from the storehouse slowly (keep to the left wall) to not get spotted.
Rewards for the completion of the mission: none
Requirements for the completion of the mission in 100%:
- Sneaky Pest - You need to steal the van and remain undetected.