The experience was good. The details surrounding the Service are concerning. We were told that the Transmission Issue we were experiencing with our '17 Yukon Denali were common. However, in our Service Report issued by the Dealer, it noted that the Trans Fluid was 'Pitch Black' causing the torque converter vibration. This is a Red Flag for us. What kind of potential damage has been done - and how can we be assured that we will not be facing major expenses and repairs down the road? Our GMC only has 31K Miles and I'm worried about long-term issues.