11-16 LML Duramax Powertrain
My 2013 2500HD CC, LML was towing 13,000 lb 5th wheel up Towne Pass in Death Valley (10-mile grade @ 7-10% approx) air temp in the '50s, RPM 2500 all gauges normal then 3/4 the way up threw a P2263 code, "turbocharger system performance". No cell service and after idling for 10 min then shutting...