VEHICLE BEGAN STALLING DURING IDLE, THEN STALLED WHILE TRAVELING AT 50 MPH. ENGINE SHUTS OFF WITHOUT WARNING. AFTER RESEARCHING ON THE CHEVYAVALANCHEFANCLUB.COM WEB SITE - I FOUND INFORMATION THAT OTHERS HAD THE SAME PROBLEM. I ASKED MY MECHANIC TO REPLACE THE CRANKSHAFT POSITION SENSOR AND I HAVE HAD NO PROBLEMS SINCE.
2011
POWER TRAIN
AT TIMES WHEN MY AVALANCHE IS SLOWING DOWN (CLOSE TO A STOP) THE TRUCK WILL LUNGE FORWARD. IT FEELS LIKE IT'S SOMETHING WITH THE TRANSMISSION (DOWNSHIFTING?). ALMOST LIKE A SURGE OF ENERGY UNEXPECTEDLY PUSHES THE TRUCK FORWARD. IT DOES CATCH ME OFF GUARD AT TIMES, BUT LUCKILY I HAVE NOT STRUCK ANYTHING WHEN IT HAS HAPPENED. IT DOES NOT DO IT ALL THE TIME, BUT RATHER INTERMITTENTLY. I AM HOPING THAT GM CAN FIGURE OUT WHY THIS IS HAPPENING AND POSSIBLY ISSUE A RECALL TO FIX THE PROBLEM. *TR