hello XXXXXXXX XXXXX,
I don't know where you live ,but I think you should find another GM dealership & maybe a different vehicle.I would suggest first that you contact GM zone representative & speak with them personally about the troubles & repairs to your vehicle.You have already spent enough to purchase another vehicle.This might be the time to put a fuel pump in it & sell it.I do believe your repairs are too high for the services rendered.You can contact the zone rep by asking the management of any GM dealer how to contact.I promise the upper management knows them.
Master A.S.E Automotive technician
A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician