I assume I’ll be calling Chevy in the morning. 2015 Silverado has been fine, then boom. Service 4 wheel drive! I can barely back it up! I’ve tried neutral, setting it to 2 WD. nothing! She’s sitting at 60,325 miles right now. I just took her for an oil change and my dealership literally gave me a paper that they inspected everything. I am so frustrated! Plus it went in 2 months ago for the power steering update.