NHTSA Complaint #10873120 — 2015 GMC CANYON

VEHICLE WILL NOT DOWN SHIFT WHEN SLOWING FROM A HIGHER SPEED AND THEN NEEDING TO ACCELERATE. VEHICLE WILL "CHUG" AND SQUAT UNTIL IT EVENTUALLY DOWN SHIFTS, OFTEN TIMES THROUGH TWO OR MORE GEARS CAUSING OVER ACCELERATION AND OVER REVVING OF ENGINE. COUPLE OF TIMES WHEN COMING TO FULL STOP AT STOP SIGN, VEHICLE STAYS IN 5TH OR 6TH GEAR UPON ACCELERATION FOR A FEW SECONDS AND THEN JUMPS GEARS TO PICK UP SPEED. DRIVING ON CRUISE IN MODERATE HILLS, VEHICLE WILL NOT DOWN SHIFT SOON ENOUGH UNTIL EVENTUALLY ENOUGH SPEED IS LOST THAT VEHICLE DOWN SHIFTS MULTIPLE GEARS FROM APPROXIMATELY 1800 RPM TO WELL OVER 3000. PROBLEM MANIFESTS ITSELF IN BOTH CITY AND HIGHWAY DRIVING.