2017 Cadillac CT6 Service and Repair Manual

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Factory-Grade Data

2017 Cadillac CT6 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Platinum Sedan 4-Door
  • Base Sedan 4-Door
  • Plug-In Sedan 4-Door
  • Luxury Sedan 4-Door
  • Premium Luxury Sedan 4-Door

Engines covered

  • 3.0L 182Cu. In. V6 GAS DOHC Turbocharged
  • 3.6L 222Cu. In. V6 GAS DOHC Naturally Aspirated
  • 2.0L 1998CC 122Cu. In. l4 GAS DOHC Turbocharged
  • 2.0L 1998CC 122Cu. In. l4 PLUG-IN HYBRID EV-GAS (PHEV) DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2017 Cadillac CT6 Recalls & Complaints

NHTSA #21V75900029/09/2021Component: EXTERIOR LIGHTING

General Motors, LLC (GM) is recalling certain 2016-2017 Cadillac CT6 vehicles. The Park/Position lights may be excessively bright. As such, these vehicles fail to comply with the requirements of Fed

Consequence

The excessive brightness may affect the vision of other drivers, increasing the risk of a crash.

Remedy

Dealers will install right and left side in-line headlight jumper harnesses, free of charge. Owner

TSB #11030974

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

TSB #11030092

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

TSB #11030091

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11027689

This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering

TSB #11027601

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11026104

This service bulletin provides information on Tire Sidewall Irregularities.

TSB #11026017

This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.

TSB #11025755

This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customers vehicles that exhibit vibration conditions without utilizing the s

Showing the 8 most recent of 661 technical service bulletins on file with NHTSA.

20260520Component: POWER TRAIN

UNKNOWN, The transmission slips,it wont drive now and my wheel barrings nearly snapped

20260520Component: SUSPENSION

UNKNOWN, The transmission slips,it wont drive now and my wheel barrings nearly snapped

20260520Component: WHEELS

UNKNOWN, The transmission slips,it wont drive now and my wheel barrings nearly snapped

20260129Component: POWER TRAIN

The vehicle experiences harsh shifting, surging, and jerking forward during normal driving conditions. The behavior has occurred repeatedly over several years and has been confirmed by the dealership.

20260129Component: VEHICLE SPEED CONTROL

The vehicle experiences harsh shifting, surging, and jerking forward during normal driving conditions. The behavior has occurred repeatedly over several years and has been confirmed by the dealership.

Showing the 5 most serious of 28 complaints filed with NHTSA.

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