The all-new 2018 Traverse (Fig. 1) features a bold design, seating for up to eight passengers, and new technologies in six trim levels: LS, LT, RS, Premier, Redline, and High Country.
A new 3.6L V6 engine (RPO LFY) is available on front-wheel drive (FWD) and all-wheel drive (AWD) models. The new RS model, which is FWD only, features a 2.0L turbocharged 4-cylinder engine (RPO LTG). All models have standard Intelligent Stop/Start technology to help conserve fuel. Both engines are paired with the 9T65 9-speed automatic transmission (RPO M3V) that offers smoother shifting and improved fuel economy.
The High Country model (Fig. 2) also is equipped with the Twin Clutch AWD system (RPO G99), which independently controls torque to each rear wheel, providing superior control with less brake intervention. The advanced AWD system is automatic and always engaged when AWD mode is selected using the Driver Mode Control on the center console. The LS, LT, Premier and Redline AWD models are equipped with single-clutch AWD.
The design of the new Traverse includes an overall weight reduction of approximately 362 lbs. (164 kg) from the previous model when equipped with the 2.0L engine. The weight reduction comes mostly from the use of thinner-gauge high-strength steels.
3.6L V6 Engine
The 3.6L V6 engine (Fig. 3) features variable valve timing (VVT) and direct injection (DI) and generates an estimated 305 horsepower and 260 lb.-ft. of torque. The DI system places the high pressure injectors in the cylinder heads. The engine has E85-compatible valves and seats with special materials and coatings that require slightly different service procedures from gasoline valves. Gasoline with an octane rating of 87 or higher is recommended.
The cylinder block is constructed of aluminum alloy by precision sand-casting with cast-in-place iron cylinder liners. The cylinder heads are cast aluminum with powdered metal valve seat inserts and valve guides. The cylinder heads also feature integrated exhaust manifolds. Which incorporate the exhaust manifolds into the head casting. The engine uses ACDelco dexos1 SAE 5W-30 viscosity grade engine oil.
2.0L 4-Cylinder Engine
The 2.0L turbocharged 4-cylinder DOHC engine (Fig. 4) is based on a generation of large displacement four cylinder engines designed for greater efficiency. It produces 255 horsepower and 295 lb.-ft. of torque.
The engine features a sand-cast aluminum cylinder block and aluminum cylinder heads. The direct injector mounting locations are below the ports. The two-stage variable displacement oil pump helps maximize fuel efficiency by matching oil supply to engine load. The engine uses ACDelco dexos1 SAE 5W-30 viscosity grade engine oil.
The turbocharger generates up to 20 pounds (138 kPa) of boost and its twin- scroll design helps optimize the usable power from the engine. Electronically controlled turbocharger supporting components, including the wastegate and bypass valve, help optimize performance and efficiency. The turbocharger intake system is supported by an air-to-air charge air cooler system.
Premium gasoline with an octane rating of 93 is recommended for best engine performance and fuel economy.
The Intelligent Stop/Start system, which turns off the engine when at a stop in certain conditions to reduce fuel consumption and emissions, is standard on both engines. It’s similar to the Stop/Start systems found on other GM models, but it offers quieter engine stops/starts with fewer vibrations and can recognize certain driving maneuvers, such as backing into a garage or parking lot situations. An advanced algorithm determines when driving conditions are optimal for engine shut-off. The engine automatically restarts after approximately two minutes if the driver hasn’t removed their foot from the brake pedal.
The system features a tandem-solenoid starter, a unique DC-DC module that maintains voltage during a stop/start event, an electronically controlled accumulator that retains the transmission fluid pressure to keep the clutches engaged for immediate takeoff when the brake pedal is released, and an engine mount system that dampens the vibrations associated with a restart.
9T65 Automatic Transmission
The 9T65 automatic transmission is transverse mounted and features a 4-element torque converter, a compound planetary gear set, friction and mechanical clutch assemblies, and a hydraulic pressurization and control system.
The planetary gear sets provide the 9 forward gear ratios and reverse. The Transmission Control Module (TCM) receives and monitors various electronic sensor inputs to shift the transmission at the optimum time. Use DEXRON-VI transmission fluid in the 9T65 transmission.
Twin Clutch AWD
The Twin Clutch AWD system delivers greater handling and stability by preemptively and electronically splitting the torque as needed between the rear wheels using twin clutches to provide added traction, stability and control versus a 50/50 split in a single clutch system.
The Twin Clutch system with active torque bias has increased capability to add stability across all driving conditions, including when one side of the vehicle is on a slippery surface and the other side has more traction. In addition, a fuel economy benefit is realized by not pushing torque when it is not needed.
Traction Select System
The Traction Select system adjusts the vehicle’s throttle response, shift mapping and stability control to maximize performance in varying road conditions based on the mode selected. The different driving modes are selected using the Driver Mode Control on the center console. (Fig. 5) If equipped with FWD, the Driver Mode Control may have the following mode selections: FWD, Snow, and Tow/Haul. If equipped with AWD, the Driver Mode Control may have Two-Wheel Drive (2WD), AWD, Off-Road, and Tow/Haul.
On AWD models, the driver can switch between FWD and AWD operation when conditions dictate without having to stop the vehicle. The AWD Mode will stay selected until the mode is changed. If the customer switches to FWD, the system efficiently disconnects virtually all of the AWD components from the drivetrain so the gears and prop shafts stop spinning, saving fuel and reducing emissions.
All models have four-wheel disc brakes with Duralife brake rotors and an electric parking brake. The Electronic Brake Control Module (EBCM) and the brake pressure modulator are serviced separately.
Depending on how the vehicle is equipped, performance enhancement systems may include Antilock Brakes, Dynamic Rear Proportioning, Hill Hold Start Assist, Intelligent Brake Assist, Traction Control and Electronic Stability Control, Trailer Brake Control, and Trailer Sway Control.
The Traverse is equipped with Chevrolet MyLink, which offers Apple CarPlay and Android Auto compatibility, and either a standard 7-inch (179 mm) diagonal touch screen (RPO IOA) or an available 8-inch (203 mm) diagonal touch screen (RPO IO5) with optional embedded navigation (RPO IO6).
The 8-inch touch screen features gesture recognition control that lets drivers use their fingertips to navigate around screens by clicking, dragging and swiping, similar to the gestures used on a tablet. The 8-inch touch screen also raises to reveal a hidden storage compartment behind the screen. (Fig. 6)
Automatic Climate Control
The Traverse features a standard tri-zone automatic climate control system with two zones in the front row and one zone in the second row. Controls are on the instrument panel and on the rear of the front row console. The second-row settings can be controlled using the infotainment touch screen. The system uses R-1234yf refrigerant. A new brushless blower motor helps eliminate the humming sounds an HVAC system can create, providing a quieter cabin.
Hands-Free Power Liftgate
The programmable power liftgate has an available hands-free functionality that enables the liftgate to be opened or closed by using a kicking motion under the rear bumper. An optional projected Chevrolet bowtie indicates the kick location, which is under the left side of the bumper. (Fig. 7) Certain conditions must be met in order for the projection to appear.
TAC Action Center (U.S.)
The GM Technical Assistance Center (TAC) has established an Action Center for the 2018 Traverse. TAC Action Centers are designed to gather early feedback and provide support for the introduction of new GM models. Dealership service departments are asked to report all vehicle issues that require immediate attention, not just concerns that require technical assistance. The goal is to develop a quick resolution to any product concerns, such as fit and finish, performance, and operation.
Action Centers have a direct connection to GM Engineering, Brand Quality and the assembly plant, which offer combined resources to immediately address product concerns seen in the dealership. Product concerns and repairs reported by technicians to the Technical Assistance Center is critical to helping ensure a successful model launch.
To contact the Traverse Action Center, call TAC and follow the prompts to:
- Select Speak with a Consultant for Vehicle Diagnostics
- Enter BAC Code
- Select Action Centers
- Select Traverse Action Center
In Canada, dealerships should follow the usual process when contacting TAC.
For more information on the new 2018 Traverse, refer to Bulletin #17-NA-176.
– Thanks to Sherman Dixon and Steve Bruder