I brought my Jeep in to have my heat fixed. Long story short, the service manager hung the phone up on me and told me that its too cold out for all car's heat to work and was charged $150 for diagnostics. I picked up the vehicle and tested the temps from each vent (as I requested) with my own thermometer and it showed my heat blowing at 80 degrees. - it should blow at at least 130. I worked with the GM to get an estimate for the fix but I was still charged for a shotty diagnostic job I did myself. Considering I was hung up on, they didnt go above and beyond to remedy. There are other dealers in the area that are better and I would recommend going there.