2018 Cadillac CTS 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
- V Sedan 4-Door
- Premium Sedan 4-Door
- Base Sedan 4-Door
- Vsport Premium Luxury Sedan 4-Door
- Vsport Sedan 4-Door
- Luxury Sedan 4-Door
- Premium Luxury Sedan 4-Door
Engines covered
- 6.2L 6162CC 376Cu. In. V8 GAS OHV Supercharged
- 3.6L 222Cu. In. V6 GAS DOHC Naturally Aspirated
- 2.0L 1998CC 122Cu. In. l4 GAS DOHC Turbocharged
- 3.6L 3564CC 217Cu. In. V6 GAS 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
General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, 2017-2018 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist may fail.
A loss of power steering assist can require greater steering effort, especially at low speeds, incre
Dealers will replace the power steering gear assembly, free of charge. Owner notification letters w
General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, and 2017 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist system may fail.
Loss of power steering assist would require a higher steering effort, especially at lower speeds, wh
GM will notify owners, and dealers will replace the power steering gear assembly, free of charge. T
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This service bulletin provides information on Tire Sidewall Irregularities.
This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
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 680 technical service bulletins on file with NHTSA.
The airbag system failed to deploy during a single-vehicle accident in which the car left the service road and struck a tree. The vehicle sustained significant front-end damage. The driver lost consc
THE TRANSMISSION "SHUDDERS". It does not happen with any regularity and with no advance warning. It may be electronic or mechanical or both.
THE TRANSMISSION "SHUDDERS". It does not happen with any regularity and with no advance warning. It may be electronic or mechanical or both.
What component or system failed or malfunctioned, and is it available for inspection upon request? From 2018. The uauto start/stop system has failed 3 times. How was your safety or the safety of othe
To Whom It May Concern, I am writing to express my serious concerns regarding a known issue with the 2018 Cadillac CTS that poses a significant safety risk. The LCD/backup display screen in my 2018
Showing the 5 most serious of 10 complaints filed with NHTSA.
