Well, on the control panel, the maximum temperature setting is 500 degrees. However, that's in relation to the temperature within the cooking chamber, and not the temperature of the grate itself.

The Pit Boss Laredo, like most Pit Boss pellet grills, comes with direct-flame access (flame broiler) that when in use it can get the grate to a higher temperature than the maximum 500 degrees that the control panel can be set to.

Pit Boss claims 'up to 1,000 degrees'. In reality though, the grate surface temperature will get up to typically 650/700 degrees when the flame broiler is in use.

However, note that this only applies to the very center of the grate. Hence, directly above the burn pot. On either side the temperature of the grate it will be less.