2011 Chevrolet Avalanche Powertrain (other) Problems

PURCHASED A USED 2011 CHEVY AVALANCHE WITH 87,000 MILES ONE OWNER FROM A SMALL DEALERSHIP. AFTER HAVING THE VEHICLE FOR ABOUT A WEEK NOTICED IT SHUDDERING WHEN PULLING ANY KIND OF GRADE. THINKING IT WAS SOME KIND OF MISFIRE HAD ALL THE PLUGS CHANGED ONLY TO FIND THAT IT ALSO HAD AN OIL FILE PROBLEM WITH 1 OF THE CYLINDERS. WHEN THE VEHICLE WOULD SHUDDER IT WAS AROUND 1500-2000 RPMS. IF I WOULD GIVE IT MORE GAS IT MADE IT PAST THE 2,000 RPMS AND WOULD SHIFT WITH NO PROBLEMS. NEEDLESS TO SAY THE TRANSMISSION IS NOW TOAST AS IT GAVE OUT COMPLETELY AND NEEDS REPLACED. NO WARNING LIGHTS OF ANY KIND MADE ME AWARE OF A POTENTIALLY SERIOUS PROBLEM. AFTER READING MORE I AM SEEING THAT THE TRANSMISSION IS SOMETHING THAT GM HAS NOT FULLY TAKEN CARE OF AS STATED WITH OLDER MODELS. THE TRANSMISSION FAILED WHILE DRIVING ON A MAJOR INTERSTATE ROADWAY WHILE NEARING THE TOP OF A HILL. IT JUST WENT COMPLETELY INTO NEUTRAL AND WOULD JUST REV THE ENGINE. THE TRUCK WAS CARRYING 3 ADULTS AND 2 CHILDREN IN CAR SEATS WHEN THIS OCCURRED. THANKFULLY WE WERE ABLE TO GET TO THE SHOULDER OF THE ROAD SAFELY. CURRENTLY THE TRUCK HAS 89,995 MILES ON IT. I ONLY PUT APPROXIMATELY 2000 MILES ON IT SINCE PURCHASE.

NHTSA ID

11363964

Incident

Oct 11, 2020

Mileage

89,895 mi

ENGINE RUNS ROUGH AT IDLE WHEN ENGINE LIGHT, SERVICE STABILITRAK LIGHT AND TRACTION CONTROL OFF LIGHTS ALL COME ON. UPON ACCELERATION, ONLY ENGINE LIGHT REMAINS ON. WILL REPEAT AT LOWER IDLE.

NHTSA ID

10968243

Incident

Jul 13, 2016

Mileage

85,000 mi

TL* THE CONTACT OWNS A 2011 CHEVROLET AVALANCHE. WHILE CHANGING GEARS TO THE DRIVE POSITION, THE GEARS LOCKED UP AND FAILED TO MOVE. THE CONTACT STATED THEY EXPERIENCED THE SAME FAILURE LISTED IN NHTSA CAMPAIGN NUMBER: 11V007000 (SUSPENSION), BUT THE VIN WAS NOT INCLUDED IN THE RECALL. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE REAR AXLE CROSS PIN NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 100,000. THE VIN WAS NOT AVAILABLE.

NHTSA ID

10853801

Incident

Apr 4, 2016

Mileage

100,000 mi

AT TIMES WHEN THE VEHICLE IS SLOWING DOWN/DOWN SHIFTING (MORE COMMON WHEN GOING UP A GRADE) IT WILL SUDDENLY LUNGE FORWARD (BEFORE COMING TO A STOP) EVEN WITH YOUR FOOT ON THE BRAKE. IT SEEMS TO HAPPEN WHEN DOWNSHIFTING FROM 2ND TO 1ST GEAR AND SOMETIMES IT CATCHES ME OFF GUARD. THIS IS A VERY DANGEROUS SITUATION ESPECIALLY WHEN SLOWING DOWN NEAR PEOPLE. I AM ALWAYS CONCERNED THAT THE VEHICLE IS GOING TO LUNGE FORWARD AND HIT SOMETHING OR EVEN WORSE SOMEONE. I HOPE NHTSA INVESTIGATES THIS SITUATION AS OTHER PEOPLE HAVE REPORTED THE SAME PROBLEM.

NHTSA ID

10810873

Incident

Dec 17, 2015

Mileage

54,000 mi

AT TIMES WHILE SLOWING DOWN (CLOSE TO A STOP) THE TRUCK WILL LUNGE FORWARD UNEXPECTEDLY PUSHES THE TRUCK FORWARD. THIS IS GENERALLY IN STOP AND GO TRAFFIC. IT BECOME VERY UNSAFE WHILE THE PROXIMITY OF OTHER CARS DURING THIS TIME IS VERY CLOSE AND COULD CAUSE INJURY. THIS IS AN INTERMITTENT PROBLEM. *TR

NHTSA ID

10639540

Incident

Sep 22, 2013

Mileage

25,360 mi

I OWN A 2011 CHEVROLET AVALANCHE LTZ AND AT TIMES WHEN THE TRUCK DOWN SHIFTS IT WILL LUNGE FORWARD. I REALLY NEED TO HAVE MY FOOT FIRMLY PRESSED ON THE BRAKE TO KEEP THE TRUCK FROM POSSIBLY HITTING SOMETHING OR SOMEONE IN FRONT OF ME. IT DOES NOT DO IT ALL THE TIME AND IT'S RATHER RANDOM. I FEEL THAT IS WORSE THEN IT HAPPENING ALL THE TIME BECAUSE I DON'T KNOW WHEN TO EXPECT IT. I HAVE NOT RECEIVED ANY NOTIFICATION OF A RECALL, BUT I FEEL A FIX IS DEFINITELY IN ORDER. SOMETHING IS NOT RIGHT AND IT COULD RESULT IN A CRASH. *TR

NHTSA ID

10552388

Incident

Nov 13, 2013

Mileage

32,000 mi

I HAVE BEGAN TO NOTICE WHEN SLOWING DOWN (FOOT OFF THE GAS AND COASTING WITH FOOT ON BRAKE, OR BRAKE APPLIED) AT ANY AREA WHERE MY SPEED DECREASES TO LESS THAN 15 MPH THAT MY AVALANCHE WILL SEEM TO SORT OF LUNGE FORWARD. THE FIRST TIME I EXPERIENCED THIS I BELIEVED IT WAS RELATED TO ME AND IGNORED IT. THE NEXT COUPLE OF TIMES I EXPERIENCED THIS I THOUGHT THERE MAY BE SOMETHING WRONG WITH THE GAS OR ENGINE. I HAVE SPOKEN WITH SEVERAL OTHER OWNERS (WHO OWN THE SAME YEAR MODEL AVALANCHE AND SUBURBAN - THE SUBURBAN AND AVALANCHE ARE MADE FROM THE SAME FRAME/BODY/PARTS) AND THEY STATE EXPERIENCING THE SAME ISSUE. I MUST BE CAUTIOUS TO RIDE MY BRAKES AND BE READ TO HEAVILY APPLY THEM NOW WHEN TAKING AN OFF/ON RAMP AND VEHICLES ARE IN FRONT OF ME AS MY VEHICLE HAS LUNGED FORWARD BEFORE WITH VEHICLES IN FRONT OF ME. I NOTICED HERE THAT (AT THE TIME OF THIS SUBMISSION) THAT TWO OTHER USERS HAVE REPORTED THE SAME INCIDENT. I AM HOPING THAT MY REPORT HERE WILL HELP OPEN AN INVESTIGATION WITH CHEVROLET ON THIS ISSUE. *TR

NHTSA ID

10543618

Incident

Sep 12, 2013

Mileage

50,146 mi

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

NHTSA ID

10533370

Incident

May 1, 2013

WHEN I AM SLOWING DOWN TO A STOP THE TRANSMISSION WILL SUDDENLY MAKE THE VEHICLE SURGE FORWARD QUICKLY. IF I NOT JUST AS QUICK TO APPLY A FIRM BRAKE I RISK HITTING THE CAR OR PEDESTRIANS NEAR ME WHICH HAS HAPPEN ON SEVERAL OCCASION. ON ONE OCCASION, AS I WAS TURNING INTO A PARKING SPACE THE VEHICLE SUDDENLY SURGED FORWARD SO FORCEFULLY THAT IT CAUSE THE FRONT LEFT BUMBLE TO TRAVEL OUTSIDE THE PLANNED PATH AND HIT A BRICK COLUMN. THIS PROBLEM ONLY OCCURS IN SITUATIONS WHEN I AM SLOWING DOWN, I.E. MAKING TURNS, TRAFFIC LIGHTS, PARKING, ETC. IT CAN BE FRIGHTENING WHEN IT OCCURS UNEXPECTEDLY. RECENTLY TOOK INTO LOCAL CHEVROLET DEALER. THEY ACKNOWLEDGED THE PROBLEM AND SAID CHEVROLET ENGINEERS ARE WORKING ON A FIX WHERE THE TRANSMISSION'S COMPUTER IS ALTERED. BUT THEY DIDN'T SEEM CONFIDENT IN THE OUTCOME. *TR

NHTSA ID

10515326

Incident

May 22, 2013

Mileage

100 mi