From what I can tell, based on the images Oakwood provided, this is what I'm thinking:
Image #1: Has to be an electric Camaro - the resemblance is near identical.
Image #2: Likely the Bolt EUV, and its close cousin from Buick, which will be based off it.
Image #3: Definitely the Silverado. I guess they never confirmed it would be called "Silverado," just that it would be a Chevy, but I can't imagine they wouldn't use the Silverado name.
Image #4: This one is the most interesting to me. From what I can tell, its the newly announced RWD Cadillac Lyriq, and likely the Chevy and Buick versions based very closely on it. These will be GM's performance electric crossover offerings.
Image #5: This is unquestionably the Cruise Origin autonomous car.
Here's a link to the info I used to reach the conclusions I did - all this stuff is on there: