2001 GMC DENALI Power Trainautomatic Transmission Problems

DT: THE CONTACT STATED THE TRANSMISSION SEAL WAS DEFECTIVE AFTER A CERTAIN AMOUNT OF MILES, IT ALLOWED THE COOLING SYSTEM TO LEAK INTO THE TRANSMISSION. WHEN ACCELERATING THE TRANSMISSION WOULD DOWN SHIFT INTO FIRST GEAR, THIS WOULD MAKE THE VEHICLE JUMP. THE TRANSMISSION FAILED AT AN INTERSECTION. WHEN THIS OCCURRED THE VEHICLE HAD TO BE DRIVEN HOME AND TO THE DEALERSHIP IN FIRST GEAR. IT WAS TAKEN TO THE DEALERSHIP WHO DIAGNOSED THE PROBLEM. THE TRANSMISSION SEAL BROKE BECAUSE THE TRANSMISSION WAS DOWN SHIFTING TOO HARD. *AK UPDATED 11/16/2005 - THE HEADLAMP LENS WAS LOOSE. THE POWER STEERING PULLEY WAS OUT OF POSITION AND CAUSED THE SERPENTINE BELT IS SQUEAKING. THE PULLEY WAS REPOSITIONED. A SMALL FUEL VAPOR LEAK WAS DETECTED POSSIBLY FROM FUEL FILLER CAP NOT BEING FULLY TIGHTENED. THE FUEL PUMP LEAKED WHEN THE TANK WAS FULL. IT WAS NECESSARY TO REPLACE THE FUEL TANK SENDING UNIT. *NM...