NHTSA Complaint #10970850 — 2016 CHEVROLET COLORADO

AT APPROX. 3500 MILES STARTED EXPERIENCING SHIFTING ISSUES. WHEN SLOWING DOWN TRANSMISSION WANTED TO STAY IN 5TH OR 6TH GEAR. ATTEMPTS TO ACCELERATE CAUSED THE TRUCK TO BOG DOWN UNTIL IT SHIFTED TO A LOWER GEAR TO ACCELERATE AGAIN. WHEN IN CRUISE CONTROL PROBLEM WAS REALLY BAD. WOULD LOOSE AS MUCH AS 5-8 MPH BEFORE A LOWER GEAR WAS FOUND TO MAINTAIN SPEED IN HILLY CONDITIONS. I TOOK VEHICLE IN FOR ITS FIRST SERVICE AT APPROX. 6000 MILES AND HAD DEALER CHECK TRANSMISSION. THEY REMAPPED SHIFT POINTS TO SPEC SOFTWARE. THIS WAS A TEMPORARY FIX. ISSUE IS SLOWLY RETURNING. I HAVE WATCHED ON CONTROL PANEL AT TRANSMISSION OIL TEMP ( TRUCK HAS TRAILER TOWING PACKAGE ETC. THIS IS A CLUSTER FEATURE AVAILABLE.) SEEMS TO SHIFT PROPERLY UNTIL OIL REACHES 100 DEGREES PLUS THEN ISSUE ARRIVES. DEALER RELAYED THERE HAD ONLY BEEN A TECH SERVICE BULLETIN HAS BEEN TO RESET MAP/SHIFT POINTS. RECENTLY PULLED MY BOAT WITH THIS TRUCK AND TRANSMISSION SHIFTED FINE. REALLY WOULD LIKE THIS ISSUE FIXED BECAUSE OTHER THEN THIS PROBLEM REALLY LIKE THE TRUCK.