This mission is only available if you selected the Smart approach to the Jewel Store Job heist in the mission Casing the Jewel Store. This is one of two heist setup mission for the Smart approach.
Michael receives a text from Lester informing him of the location of a Bugstars Pest Control Van. He then heads to the Bugstars warehouse located in the Port of Los Santos to steal a van for the Jewel Store Job.
Steal a Bugstars Van
When you arrive, make your way to the warehouse and steal a Bugstars Van.
There are two ways to receive the van: Michael can enter sneaking in through the back of the warehouse, take out one employee by stealth, before driving the van away undetected or Michael can go in from the front of the warehouse but the Bugstars employees will become aggressive. With weapons drawn they will run away in fear. But Michael will get a wanted level.
Tip! To obtain a gold medal for this mission, go around to the back (water side) of the warehouse and enter stealth mode. Sneak up on the employee at the rear of the van and knock him out. Get in the van and exit via the rear of the warehouse.