Why is there white smoke coming out Why it acting like its gonna die

Hello, white smoke is evidence of condensation or internal engine coolant leakage. It wouldn't be common for your Tahoe to have an internal engine coolant concern. So, I'm wondering about the "white" smoke really and hope someone local to you can see your vehicle and evaluate it. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops