Freaking have a 2014 GMC Sierra Slt 4x4 5.3 lifted in 35s,,,,, just drive to Northern Michigan for the 4th from saintpetersburg Florida . Well on way back pulling a snall 8x9 trailer when I hit Georgia 94 degrees out, felt hesitation and RPMS sky rocketing up to 4K and truck not moving no where just slowing down , I was on 75s, Temp was 235...., check engine light came on and went to limp mode and had to Manuel shift it back to where I bought it from in dade city , took it there straight from road trip with trailer and bikes in back this pastSaturday July 11 2020 ....... waiting to find out . Truck was shacking like crazy and Making somuch clanking and winding noises . Limped it back 35mph all way to dealer ...... just hit 102,000