Zombies mode returns in Call of Duty: Black Ops 7 with the brand-new Ashes of the Damned map. The roads of Ashes of the Damned are dangerous, so you'll want the map's new Wonder Vehicle in order to survive. Here we'll guide you through how to repair and upgrade Ol' Tessie to make the truck even more powerful. We'll also include some helpful tips for finding and respawning the truck.The full upgrade quest requires the use of the map's unique Necrofluid Wonder Weapon, and you'll want to get started on these steps as soon as possible. You can refer to our guide on how to unlock the Necrofluid Wonder Weapon. There are also parts for later steps that you can collect early in your match, so it's best to read through the parts needed for Tessie's turret upgrade before getting started.Completing all upgrades for Ol' Tessie will also unlock the Black Ops 7 trophy/achievement titled "I Heard You Like Upgrades."Continue Reading at GameSpot