To find a shovel in Grand Theft Auto V (GTA 5) to dig up a grave, you should follow these steps:

1. Understand the Game Mechanics: There is no shovel available as an equippable weapon in GTA 5. Shovels are not part of the game’s standard inventory or available for use in the game mechanics.

2. Check for Easter Eggs: Some players might be referring to Easter eggs or specific actions that mimic the use of a shovel. However, these are not actual shovels and are not intended for digging graves.

3. GTA Online Specific Action: In GTA Online, there is a specific action that can be performed to get a shovel-like object, but this is not related to digging graves. The action involves pressing the PS button for one second, then down on the d-pad three times, and finally pressing the X button during a cutscene. This will give you a shovel-like object, but it’s not for digging graves.

In summary, there is no shovel in GTA 5 that you can use to dig up a grave. Any references to shovels are likely misinterpretations or Easter eggs not related to the game’s main mechanics.