You don't need to hire a lemon law lawyer. In the book in the glove box it explains everything you need to do to pursue a lemon law case in your state. I will tell you it is long, frustrating, and more frustrating but hopefully worth it for you in the end. Most states require at least 30 days in the shop with 4 attempts to fix as well as a final repair attempt.
Start by filing a case with the BBB.
Send a certified letter to GM with:
FINAL REPAIR NOTICE (This statement is very important!!)
Date
Name
Address
Phone
Vin #
detail every time it has been in for service, what has been done, and how long each time you have been without the truck.
What you would like as an outcome (buy back or exchange for something else)
Signature with Date again
Keep copies of everything! Make a file and buckle up you're in for a long ride!
I have spent hours and hours and hours on this. GM will assign a rep who will ask for your patience and act like he is on your side. I am currently in the final repair attempt stage ugh I feel like this is going to drag on FOREVER!