Here are all the codes to the new skins and items added from the Hammerlock DLC. They can't be used until the DLC officially releases though. Also yes, as you can see, they have added a new vehicle to the game.
Credit goes to blakwidowstang for finding all the save codes!
Weapon Codes
Chopper - BL2(hwAAAADftQSApoAJAyGTgWIIxBCBEgGDIYYGDBUY/v9LoPw=)
Damned Cowboy - BL2(hwAAAACcbASCRoAJByGTmWIYxICAkgEDIob//xUY/v8roPw=)
Lead Storm - BL2(hwAAAADFvQSEZgMJCyGT3WIoxAAKUgGDIoYGDBUY/v+Tgvw=)
Harpoon Gun - BL2(hwAAAABTagRBB4AICSGTAaAgQwGA8f+/GwoIFBwo/v8boPg=)
Rex - BL2(hwAAAAAJuwSHJ4AJByGTQcOIhVGAEgLG/////x0w/v8boPw=)
Infection - BL2(hwAAAACdJwSGRwMJESGTucOAhREK8gHG//8KGB0w/v+Xgvw=)
Interfacer - BL2(hwAAAADv2wQCKAMJDSGTkUJZgyIK8v8/G5QKKBJQ/v+bgvw=)
Hydra - BL2(hwAAAAAQPAQA6IAJByGTrUBRg0KBMgEKHJT//xJQ/v9XoPw=)
Twister - BL2(hwAAAABe9wQACIEJByGTrUBRg4KBMgEKHBQMKBJQ/v9noPw=)
Yellow Jacket - BL2(hwAAAADgggRCiIAJDSGTpWI5weKAcgELC5YHLBRY/v9DoPw=)
Hawkeye - BL2(hwAAAADC1wSEiAMJByGTgYJZAJMK0gVMBZj//2Rg/v+jgvw=)
Elephant Gun - BL2(hwAAAAAZxgSECIAJByGTEaBcADOAshdMBZj//19g/v8LoPw=)
Relic
Breath of the Seraphs Relic - BL2(BwAAAABC8AQADgGoMBEyGQCABsD/////////PwCjAeM=)
Shield
The Rough Rider Shield - BL2(BwAAAACz4AQAAwEYcBAyGQIEBcQHRADg/////////z8A4A==)
Character Heads and Skins
Zero Head - BL2(BwAAAABPVgQADwGw8P8AwA==)
Zero Skin - BL2(BwAAAAAF9wQBDwOw8P8AwA==)
Axton Head - BL2(BwAAAAAHmQQAEwHQ8P8AwA==)
Axton Skin - BL2(BwAAAABNOAQBEwPQ8P8AwA==)
Salvador Head - BL2(BwAAAADAOQQAEQHA8P8AwA==)
Salvador Skin - BL2(BwAAAACKmAQBEQPA8P8AwA==)
Maya Head - BL2(BwAAAACBHAQAEgHI8P8AwA==)
Maya Skin 1 - BL2(BwAAAADLvQQBEgPI8P8AwA==)
Maya Skin 2 - BL2(BwAAAADJbwQCEgXI8P8AwA==)
Gaige Head - BL2(BwAAAADEcQQAEAG48P8AwA==)
Gaige Skin - BL2(BwAAAACO0AQBEAO48P8AwA==)
Fanboat Skins
BL2(BwAAAADeggQhAEMA8P8AwA==)
BL2(BwAAAAB3pwQQACEA8P8AwA==)
BL2(BwAAAAB1dQQTACcA8P8AwA==)
BL2(BwAAAAA/1AQSACUA8P8AwA==)
BL2(BwAAAAA9BgQRACMA8P8AwA==)
BL2(BwAAAADrfwQdADsA8P8AwA==)
BL2(BwAAAADu2wQbADcA8P8AwA==)
BL2(BwAAAACh3gQcADkA8P8AwA==)
BL2(BwAAAACTVQQlAEsA8P8AwA==)
BL2(BwAAAACRhwQmAE0A8P8AwA==)
BL2(BwAAAADbJgQnAE8A8P8AwA==)
BL2(BwAAAABAiAQvAF8A8P8AwA==)
BL2(BwAAAABCWgQsAFkA8P8AwA==)
BL2(BwAAAAAI+wQtAFsA8P8AwA==)
BL2(BwAAAAAKKQQuAF0A8P8AwA==)
BL2(BwAAAACUIwQgAEEA8P8AwA==)
BL2(BwAAAAADwQQOAB0A8P8AwA==)
BL2(BwAAAAABEwQNABsA8P8AwA==)
BL2(BwAAAADXagQBAAMA8P8AwA==)
BL2(BwAAAACdywQAAAEA8P8AwA==)
BL2(BwAAAAB76wQ2AG0A8P8AwA==)
BL2(BwAAAAAzmAQ0AGkA8P8AwA==)
BL2(BwAAAAB5OQQ1AGsA8P8AwA==)
BL2(BwAAAAAxSgQ3AG8A8P8AwA==)
BL2(BwAAAADZ9AQkAEkA8P8AwA==)
BL2(BwAAAADcUAQiAEUA8P8AwA==)
BL2(BwAAAACW8QQjAEcA8P8AwA==)
BL2(BwAAAABLsgQMABkA8P8AwA==)
BL2(BwAAAAAEtwQLABcA8P8AwA==)
BL2(BwAAAACjDAQfAD8A8P8AwA==)
BL2(BwAAAACYbwQGAA0A8P8AwA==)
BL2(BwAAAADSzgQHAA8A8P8AwA==)
BL2(BwAAAABw0QQVACsA8P8AwA==)
BL2(BwAAAAByAwQWAC0A8P8AwA==)
BL2(BwAAAAA6cAQUACkA8P8AwA==)
BL2(BwAAAADVuAQCAAUA8P8AwA==)
BL2(BwAAAACavQQFAAsA8P8AwA==)
BL2(BwAAAADQHAQEAAkA8P8AwA==)
BL2(BwAAAACfGQQDAAcA8P8AwA==)
BL2(BwAAAAB+TwQwAGEA8P8AwA==)
BL2(BwAAAAB8nQQzAGcA8P8AwA==)
BL2(BwAAAAA07gQxAGMA8P8AwA==)
BL2(BwAAAAA2PAQyAGUA8P8AwA==)
BL2(BwAAAADprQQeAD0A8P8AwA==)
BL2(BwAAAACkegQaADUA8P8AwA==)
BL2(BwAAAACmqAQZADMA8P8AwA==)
BL2(BwAAAAA4ogQXAC8A8P8AwA==)
BL2(BwAAAADsCQQYADEA8P8AwA==)
BL2(BwAAAABJYAQPAB8A8P8AwA==)
BL2(BwAAAABH/gQqAFUA8P8AwA==)
BL2(BwAAAAANXwQrAFcA8P8AwA==)
BL2(BwAAAABFLAQpAFMA8P8AwA==)
BL2(BwAAAAAPjQQoAFEA8P8AwA==)
BL2(BwAAAABOFgQKABUA8P8AwA==)
BL2(BwAAAABMxAQJABMA8P8AwA==)
BL2(BwAAAAAGZQQIABEA8P8AwA==)
Credit goes to blakwidowstang for finding all the save codes!
---------- Post added at 12:41 PM ---------- Previous post was at 12:28 PM ----------
Oh and a fun fact, after doing some research and through testing thoroughly, a damage mod on a weapon in most cases will potentially deal more damage then a weapon with a critical mod.
So theoretically, a base damage increase will do more damage than a critical damage increase. Try making a sniper, completely identical except for the tech mod and fire it on the training dummy at Markus' shop. You will find that the damage mod deals more damage compared to the critical mod.When a weapon card says "+X% Critical Hit Damage," that value indicates the total effective multiplier. For example, a non-Jakobs pistol that says "+8% Critical Hit Damage" is actually reflecting the increase from a Hyperion barrel; the multiplier of 2.15 corresponds to a total effective increase of 7.5% (rounded to 8%); the weapon doesn't actually have a built-in critical hit damage bonus (like sniper rifles do). Similarly, if a Jakobs sniper rifle says "+180% Critical Hit Damage," that means the total bonus is +180%, not 180% on top of the base 160% that all Jakobs sniper rifles have.
Keep that in mind if you want a "perfect" damage dealing weapon.