2006 GMC Yukon Denali Xl

WHEN TAKING OFF FROM A STOP OR AT A SLOW SPEED THE CAR STALLS LIKE ITS RUNNING OUT OF GAS, WHEN THAT HAPPENS ON THE DIAGNOSTIC CENTER ON THE CAR READS "TRACTION ACTIVE", AND THEN CAR BEHIND ME BLOWS THEIR HORN TELLING ME TO MOVE, THEN THE CAR TAKES OFF. ITS REALLY SCARY WHEN I'M IN THE MIDDLE OF TRAFFIC IN THE INTERSECTION OR TRYING TO MAKE A LEFT TURN AND TRYING TO GO AND IT STALLS. SOONER OR LATER SOMEONE IS GOING TO RUN INTO THE BACK OF ME OR WHEN I'M IN THE INTERSECTION I WILL BE T-BONE AND SOMEONE IS GOING TO GET KILLED OR SERIOUSLY INJURED. I TOOK IT TO THE GM REPAIR CENTER AT ART MORAN 9/10/2015 AND THEY TELL ME THERE'S NOTHING WRONG. THE SERVICE ADVISOR REGGIE GARRETT ASK IF THEIR WAS A CERTAIN TIME IT WOULD ACT LIKE THIS AND I TOLD HIM IT SEEMS LIKE WHEN ITS HOT OUTSIDE IS WHEN I NOTICE IT. THEN, THE VERY NEXT MORNING ABOUT A HALF MILE INTO THE DRIVE IT DID THE SAME THING. SO I CALLED REGGIE UP AND TOLD HIM IT DOESN'T MAKE A DIFFERENCE IF ITS HOT OUTSIDE OR COOL IT DOES THE SAME THING, AND THIS IS ALL WHILE I'M ON MY WAY OVER TO THEIR REPAIR SHOP IT DID THIS 7 TIME ALL AT DEAD STOPS OR SLOW SPEEDS. ONCE I MADE IT TO THE SHOP I ASK REGGIE TO GET HIS TECH. TO DRIVE IT WITH HIS SCANNER PLUGGED IN, BUT HE SUGGESTED I DRIVE IT BUT WHEN IT DID IT THE SCANNER DIDN'T RECORD IT. I GOING BACK THERE THIS WEEK AND ON THE WAY I'M GOING TO RECORD IT ON CAMERA IN AN EFFORT TO DOCUMENT WHAT GOING ON.