2018 Chevrolet Colorado

TRANSMISSION EXHIBITS INTERMITTENT HESITATION, JERKING AND SHAKING WHEN TAKING OFF FROM A STOP AND REVERSE LURCHING WHILE AT HIGHWAY SPEEDS. THE TRANSMISSION FLUID HAS BEEN CHANGED PER THE BULLETIN WITHOUT SUCCESS. THE TRUCK HAS BEEN TO THE DEALERSHIP 4 TIMES WHERE THEY TYPICALLY REPORT "UNABLE TO DUPLICATE PROBLEM" AND THEREFORE DO NOTHING. THE LATEST COMMENT FROM GM CUSTOMER CARE WAS TO BLAME ALL THESE ISSUES ON MY TIRES (36000 MILES). LOSS OF POWER EQUALS A TIRE ISSUE?

WHEN COMING TO STOP FROM ANY SPEED THE TRUCK DOWNSHIFT HARD THAT IT FEELS LIKE YOU'VE BEEN HIT FROM BEHIND. ALSO WHEN USING REMOTE START AND YOU PUT THE KEY IN THE IGNITION AND TURN IT ON THE TRANSMISSION DOES A LITTLE JUMP LIKE THE TRUCK IS GOING INTO GEAR. WE HAVE TAKEN IT IN FOR REPAIRS 3 TIMES AND THE LAST TIME WE WERE TOLD THE ISSUE COULD NOT BE FIX AND THAT IT WAS NORMAL.

TRANSMISSION HAS HORRIBLE SHIFTING. HARD SHIFTING AT LOW SPEEDS AND WHEN DECELERATING (FEELS LIKE I WAS REAR ENDED). TORQUE CONVERTER WAS REPLACED. FROM LOW SPEED, IT DOESN'T DOWNSHIFT TO ACCELERATE UNLESS THE PEDAL IS FLOORED. ALSO, THERE IS HESITATION/PEDAL LAG FROM A STANDSTILL, WHICH MAKES IT UNPREDICTABLE WHEN TRYING TO PULL INTO TRAFFIC. THAT PART IS A REAL SAFETY CONVERN.

TRUCK SHAKES AT SPEEDS ABOVE 55 MPH. AT 65 MPH MY PHONE WILL FLY OFF THE MAGNET MOUNT ON THE WINDSHIELD; WATER AND ICE SHAKE AS IF BOILING AT 70 MPH AND ABOVE. SOMETIMES THE VEHICLE FEELS LIKE IT IS COMING APART IT SHAKES SO HARD. WHEN THE VEHICLE WAS TWO MONTHS OLD IT STOPPED ON A CITY STREET IN ARLINGTON VA AND WAS UNDRIVEABLE. AFTER A TIMEOUT PERIOD OF 10-15 MINUTES IT WAS DRIVEABLE BUT AT 10 MPH IT WHINED AS IF THE TRANSMISSION OR ENGINE WAS GOING TO BLOW UP. AT 20-25 MPH IT WAS A SCREAMING DEMON AND HAD TO BE TOWED TO THE DEALERSHIP (BROWNS) WHO FOUND NO RECORD IN CAR COMPUTER SYSTEM OF FAULT. BATTERY OR ELECTRICAL SYSTEM WAS COMPLETELY DEAD ON 7 JUNE 2019 WITH ABOUT 10,200 MILES. DEALERSHIP KNEW I HAD APPOINTMENT AND I ASKED FOR TOW BUT THEY DON'T PROVIDE A TOW FROM REED-LALLIER. ONSTAR WAS OF LITTLE HELP SO I CALLED MY USAA INSURANCE ROADSIDE ASSISTANCE TO GET TRUCK JUMP STARTED; I MISSED APPOINTMENT AND THEY CANCELED APPOINTMENT THAT MORNING WHICH WAS TO CHECK FOR SHAKING AND ALSO 2ND OIL CHANGE. GMCUSTOMERCARE TOOK MY CONCERNS AND ASKED MY RESOLUTION WHICH WAS CHECK BATTERY FOR BAD CELL, BE AWARE OF FIRST TRANSMISSION PROBLEM IN ARLINGTON VA AND THE CURRENT PROBLEM OF VEHICLE SHAKING. I AM A RETIRED PARATROOPER WITH VERIFIABLE SEVERE NERVE DAMAGE TO MY BACK AND LOWER LEGS AND THIS VEHICLE CAUSES SERIOUS PHYSICAL AND NEUROLOGICAL PROBLEMS WHEN DRIVING HIGHWAY SPEEDS.

PURCHASED NEW CHEVY COLORADO 4X4 EXTENDED CAB WITH 3.6-LITER V6, TRANSMISSION 8-SPEED MODEL 8L45. TRANSMISSION DEVELOPED SHUDDER DURING LIGHT THROTTLE ACCELERATION BETWEEN 30 AND 70 MPH. SHUDDER IS CYCLIC LASTING 4 - 12 SECONDS, REACCURRING 45 - 90 SECONDS. SHUDDER FEELS SIMILIAR TO DRIVING OVER MILD RUMBLE STRIPS OR ROUGH PAVEMENT. FIRST NOTICE TRANSMISSION PROBLEM AROUND 1200 MILE MARK, TOTAL MILEAGE ON VEHICE AS OF APRIL 11, 2019 IS 2750 MILES. MORE INFORMATION CAN BE FOUND WITH GE SERVICE INFORMATION (SI) AS A TECHINICAL SERVICE BULLETIN (TSB). REFER TO THESE GM TSB'S 16-NA-175, 18-NA-177, AND 18-NA-355.

TL* THE CONTACT OWNS A 2018 CHEVROLET COLORADO. WHILE APPROACHING A STOP, THE VEHICLE DOWNSHIFTED WITHOUT WARNING. THE FAILURE OCCURRED INTERMITTENTLY. BOB HOOK CHEVROLET (4144 BARDSTOWN RD, LOUISVILLE, KY 40218, (844) 212-4818) DIAGNOSED AND REPAIRED THE TORQUE CONVERTER AND CHANGED THE FLUID, BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 15,000.

HARD/ROUGH SHIFTING UP IN GEARS AND SAME DOWN SHIFTING IN GEARS. SHAKING/JERKING/SHUDDERING AT SPEEDS APX. 20-70 MPH. TRANSMISSION CAN DOWN SHIFT SO HARD, AT TIMES, IT FEELS LIKE SOMEONE HIT YOUR FROM BEHIND. WANTS TO STALL/SLIP SHIFTING UP IN GEARS. SEEMS TO HAVE TOO MUCH FREE PLAY IN DRIVELINE WHILE SITTING STILL SHIFTING FROM DRIVE TO REVERSE. MAKES A CLUNK SOUND.