2012 GMC YUKON Vehicle Speed Control Problems

Driving on loop 20 overpass on Hwy 59 in Laredo Texas suddenly the engine lost power and started to skip and miss fire while a loud tapping noise was generated, due to the loss of power and skipping, alarms showed in the main console requiring immediate service to the engine, traction and braking sys, the lack of engine power place me in a very critical and unsafe situation wherein I was about to be rear collision by the vehicle behind me. This event happened on October 17th, 2025 . I brought the vehicle to Powell Watson Motors who is the GMC dealership in Laredo Texas for inspection but they refused to accept the vehicle due to the age of the vehicle. I feel this safety issue must me corrected and resolved in order to avoid accidents and deaths.

WHEN DRIVING IT SOMETIMES BEGINS TO HESITATE REDUCE POWER THE TRACTION AND STABILITY AND ENGINE LIGHT COMES ON. WHEN THIS HAPPENS THE RPM GAUGE AS WELL STOPS WORKING. IF I PULL OVER ON SIDE OF ROAD AND TURN OFF AND RESTART MOST TIMES THE IGNITION WILL HANG AND KEEP TRYING CRANK THE VEHICLE. IT'S HESITANT TO CRANK WHEN THIS HAPPENS AND SOMETIMES CRANKS AND THEN IMMEDIATELY DIES. IT WILL SHIFT HARD JUST BEFORE POWERING INTO A REDUCED POWER MODE. IF YOU TURN OFF RESTART TURN YOUR WHEEL ALL THE WAY LEFT AND THEN ALL THE WAY RIGHT AND CRANK IT WILL SOMETIMES MAKE THE LIGHTS GO OFF AND YOU THINK RESET BUT AS SOON AS YOU START DRIVING IT HAPPENS AGAIN. I UNDERSTAND THIS IS A PROBLEM A LOT AND I MEAN A LOT ARE HAVING SO NOT SURE WHY THIS ISN'T BEING INVESTIGATED AND RECALLED. MOST SAY NO MATTER...

I WAS LEAVING A STORE AND VEHICLE STALLED OUT AND LOST OF ALL ELECTRIC IN VEHICLE AND WAS ALMOST HIT BY ON COMING VEHICLES! WOULD GO DEAD AND START AGAIN BY ITSELF BUT AS I TRIED TO ACCELERATE IT WOULD CONTINUE TO STALL AS IF IT WAS SHUTTING DOWN! I LOST ALL CONTROL OF THE VEHICLE! ONCE I PULLED OF THE ROAD AND STOPPED VEHICLE START TO FLICKERING SO I SAT FOR A BIT AND WHEN IT STOP FLICKERING I TRIED CONTINUING HOME! CUT THE VEHICLE OFF IN PARK TRIED TO START IT BACK WITH NO RESPONSE BUT AS I SAT I TRIED IT AGAIN AND IT FINALLY STARTED BUT STILL FLICKERING!! PLEASE HELP I HAVE HEARD THIS IS A ONGOING PROBLEM FOR MANY OF THE VEHICLE OWNERS!! THIS TO ME IS A VERY SERIOUS DANGEROUS PROBLEM!!

WHEN PRESSING DOWN ON ACCELERATOR TO GET INTO TRAFFIC FLOW SOMETHING STICKS SO THAT THE ENGINE RUNS AT HIGH SPEED UNTIL YOU KICK THE PEDAL TWO OR THREE TIMES TO RELEASE WHAT EVER IS STICKING. HAS HAPPENED MULTIPLE TIMES.