NHTSA Complaint #11405442 — 2017 CADILLAC CT6

POWER TRAIN issue reported to NHTSA

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Complaint Details

ODI Number	11405442
Vehicle	2017 CADILLAC CT6
Component	POWER TRAIN
Date of Incident	March 10, 2020
Date Filed	March 29, 2021
Mileage	500 miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	AZ

Consumer Description

MY 2017 CADILLAC CT6 3.0 TT PREMIUM LUXURY HAS HAD THIS ISSUE SINCE I PURCHASED IT. DEALERSHIP STATE THAT THIS IS NORMAL AND I SHOULD LIVE WITH IT. IF I KNEW THIS BEFORE I PURCHASE THIS $98,000 VEHICLE I WOULD HAVE GONE MERCEDES-BENZ. THE ISSUES WITH THE 8-SPEED 8L90 GM TRANSMISSION ARE TWO-FOLD. FIRST, THE TRANSMISSION SHUDDERS FREQUENTLY. SECONDLY, THE SHIFTS ARE VERY HARSH BETWEEN FIRST TO SECOND, AND THEN SECOND DOWN TO FIRST, ESPECIALLY WHEN ACCELERATING AND THE TRANSMISSION IS UPSHIFTING OR DECELERATING AND THE TRANSMISSION IS DOWNSHIFTING. THESE CONDITIONS ARE MOST COMMONLY OBSERVED UNDER LIGHT AND MEDIUM THROTTLE APPLICATIONS, AND AS OFTEN DURING FULL THROTTLE APPLICATIONS. I HAVE HAD THE TSB 18-NA-335 DONE AND ISSUES STILL REMAIINS.

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