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GMC LIFE

NEXT GENERATION 2019 GMC SIERRA: TRACTION SELECT SYSTEM

How to tailor the Next Generation 2019 Sierra for the road at hand, all with a simple twist of your wrist.

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No two roads or situations are exactly alike. That’s where the new Traction Select system, which is available on the Next Generation 2019 GMC Sierra, comes into play. With a quick twist of the wrist, drivers can quickly optimize their truck for the situation at hand.

HOW IT WORKS
Engineers spend thousands of hours honing, tuning, and calibrating the various systems integral to Sierra – including Traction Control, Stabilitrak, Electronic Power Steering, transmission shift calibrations, accelerator pedal response, amongst others.

“When we develop new vehicles, we generally have to find a middle ground for calibrating performance that works for all users, on all roads, in all scenarios,” says Scott Creehan, an engineer whose team helped develop Traction Select. “Sierra’s Traction Select System, however, allows us to expand our horizons, and Sierra’s capability. By creating distinct, selectable drive modes for the Next Generation Sierra, we can truly tailor the truck to deliver peak performance in a variety of situations.”

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges.

  • Canyon’s 7700-lb rating requires 2WD Crew Cab model with available Duramax 2.8L I-4 Diesel engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Sierra's 12,500-lb rating requires Sierra Double Cab or Crew Cab Short box 2wd with 6.2L EcoTec3 V8 engine and NHT Max Trailering Package. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Requires Double Cab with available 6.2L V-8 and Max Trailering Package. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges. Bed/Roof-Mounted Bicycle Carriers shown. Requires crossbars or Thule Rack Solution. Non-GM warranty. Warranty by Thule®. See dealer for more information.

  • Available. Requires 2.0L Turbocharged gas engine.

  • Terrain's 3,500-lb rating requires available 2.0L Turbocharged gas engine and available trailering equipment. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Requires available 3.6L V6 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Sierra Denali's 9,300-lb rating requires 2wd. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Savana Cargo's 10,000-lb rating requires 6.0L V8 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Savana Passenger's 10,000-lb rating requires 2500 Wheel Base with 6.0L V8 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Gross Combination Weight Rating (GCWR). When properly equipped; includes weight of vehicle and trailer combination, including the weight of driver, passengers, fuel, optional equipment and cargo in the vehicle and trailer.

  • When properly equipped; includes weight of vehicle, passengers, cargo and equipment.

  • Canyon’s 7000-lb rating requires available trailering package and 3.6L V-6 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Gross Combination Weight Rating (GCWR). When properly equipped, includes weight of vehicle, passengers, cargo and equipment.

  • When properly equipped; includes weight of vehicle, passengers, cargo and equipment.

HOW TO USE TRACTION SELECT
Traction Select commands some fairly advanced technologies within Sierra – however, utilizing it is extremely simple and straightforward. A rotary dial, placed within easy reach of the driver in the upper left-hand corner of the instrument panel, allows the driver to quickly select between drive modes.

By twisting the dial to the left or right, the driver can toggle between different modes. On Sierra Denali, the Driver Information Center will display the selected and available drive modes once the dial is turned. Available modes will vary depending on the particular driveline and options ordered.

TOUR MODE
When first starting up the 2019 Sierra, Tour Mode is selected by default – and for good reason: it’s designed to deliver the right blend of refinement and efficiency for everyday use, both around town and out on the highway. On Sierra Denali, the Continuous Damper Control suspension – which can quickly adjust suspension dampening rates and, subsequently, ride quality – is set to deliver as refined a ride as possible.

SPORT MODE
Drivers wanting a more spirited feel from their Sierra can select Sport Mode. In Sport Mode, Sierra’s transmission is eager to downshift in order to keep the engine in its peak power band. Additionally, the power steering assist is slightly reduced – in turn, making the steering feel more direct, communicative, and sporty. On Sierra Denali, Sport Mode also works with Continuous Damper Control to stiffen the suspension dampers, helping deliver a sportier feel.

TOW/HAUL MODE
Much like the Tow/Haul mode found in many other GMC vehicles, the Tow/Haul setting within the 2019 Sierra’s Traction Select system is designed for use when trailering or when carrying large payload – but goes a step beyond those systems.

First, Tow/Haul modifies the transmission calibration, so that shift points are higher, allowing the engine to deliver peak power. It also initiates downshifts earlier in order to leverage engine braking and reduce wear on Sierra’s brake components. Tow/Haul also engages Grade Braking functionality. When driving on long, downhill stretches, a light touch of the brake pedal can initiate a downshift to slow the vehicle more efficiently.

Secondly, Tow/Haul also allows Sierra’s Trailer Sway Control to respond quickly. Working in conjunction with the Stabilitrak stability system, Trailer Sway can apply braking or reduce engine power once trailer sway is detected, in order to help bring the trailer under control. To further allow for confident handling at speed with a trailer, Tow/Haul also incorporates a power steering calibration with a firmer, more direct feel.

Tow/Haul helps maximize Sierra’s performance potential by both providing a more responsive accelerator pedal calibration – much like that used in Sport Mode – and disabling Start/Stop functionality.

On Sierra Denali, which features a standard 8" Digital Driver Information Center, selecting Tow/Haul mode also swaps the voltmeter gauge display within the cluster with a gauge for transmission temperature – an important item to keep tabs on, especially when trailering through hilly terrain.

SNOW MODE
Available only on two-wheel drive Sierras, Snow Mode optimizes Sierra’s driveline for driving in wintry weather. In addition to leveraging Sierra’s standard Traction Control and Stabilitrak stability control systems, Snow Mode also provides a slower, less sensitive accelerator pedal calibration. “This pedal calibration gives the driver the ability to apply throttle in a more precise manner,” says Creehan. “As such, it allows for careful throttle application, allowing the driver to reduce the chance of wheelspin in the first place.”

OFF-ROAD MODE (4WD with 2-speed transfer case)
Four-wheel drive Sierra Denali models, along with Sierra AT4 models equipped with the available Technology Package, include a two-speed Autotrac transfer case – and include an Off-Road Mode within Traction Select, which is designed for use for higher-speed driving on non-paved surfaces.

Off-Road mode incorporates the same accelerator calibration as Snow Mode, giving the driver precise throttle control. Off-Road mode also incorporates unique Stabilitrak and traction control calibrations, which allow for a little more wheelslip than on dry surfaces, in order to help carry momentum – important on gravel or in muddy situations.

TERRAIN MODE (4WD with single speed transfer case)
2019 Sierra models equipped with a single-speed transfer case offer a unique Terrain Mode, which is selected by way of a distinct button located just below the Traction Select knob. Terrain Mode allows the single-speed transfer case to deliver performance akin to the two-speed when used off road.

Terrain Mode is designed for use in low-speed off-road driving and helps replicate the control of a traditional low-range four-wheel drive gearing. Additionally, it works to assist the driver on very technical terrain, where precise vehicle control is essential.

“Our goal with Terrain Mode was to assist the driver, but to ensure they didn’t feel isolated from the off-roading experience,” says Creehan. ”We wanted Terrain Mode’s functionality to feel natural – and above all, be enjoyable.”

In order to select Terrain Mode, the transfer case must be in four-wheel drive (4 High). A unique transmission calibration helps leverage as much engine braking as possible. Like Snow Mode, the accelerator pedal is tuned to respond slowly, allowing for a more precise application of throttle – important when trying to regulate wheelspin when climbing uneven surfaces – while Start/Stop is disabled to avoid any interruption when slowly traveling over rough terrain.

Terrain Mode also employs advanced brake-based controls to not only modulate torque across axles – important on loose or uneven surfaces – but it can also work along with engine braking to help regulate speed, especially when travelling slowly downhill.

At speeds between 10-25 mph, Terrain Mode will slow the vehicle to a creep speed, much like low-range gearing would in a two-speed transfer case. In the case of more challenging situations – like traversing small boulders or logs – the driver can manually shift the transmission into first or second gear (L1 and L2). In this case, the brake system will work to bring the truck to a full stop if the driver removes his or her foot from the accelerator.

Terrain Mode can also leverage an advanced form of Hill Start Assist, which helps hold the brakes under certain conditions while the driver shifts his or her foot from the brake pedal to the accelerator, helping prevent Sierra from moving during the transition, especially while driving through rocky terrain or steep paths.

For more information on how to use Traction Select in the 2019 Sierra, reference your owner’s manual, or visit the GMC Owner’s Center on GMC.com.

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  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges.

  • Canyon’s 7700-lb rating requires 2WD Crew Cab model with available Duramax 2.8L I-4 Diesel engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Sierra's 12,500-lb rating requires Sierra Double Cab or Crew Cab Short box 2wd with 6.2L EcoTec3 V8 engine and NHT Max Trailering Package. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Requires Double Cab with available 6.2L V-8 and Max Trailering Package. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges. Bed/Roof-Mounted Bicycle Carriers shown. Requires crossbars or Thule Rack Solution. Non-GM warranty. Warranty by Thule®. See dealer for more information.

  • Available. Requires 2.0L Turbocharged gas engine.

  • Terrain's 3,500-lb rating requires available 2.0L Turbocharged gas engine and available trailering equipment. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Requires available 3.6L V6 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Sierra Denali's 9,300-lb rating requires 2wd. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Savana Cargo's 10,000-lb rating requires 6.0L V8 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Savana Passenger's 10,000-lb rating requires 2500 Wheel Base with 6.0L V8 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Gross Combination Weight Rating (GCWR). When properly equipped; includes weight of vehicle and trailer combination, including the weight of driver, passengers, fuel, optional equipment and cargo in the vehicle and trailer.

  • When properly equipped; includes weight of vehicle, passengers, cargo and equipment.

  • Canyon’s 7000-lb rating requires available trailering package and 3.6L V-6 engine. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Gross Combination Weight Rating (GCWR). When properly equipped, includes weight of vehicle, passengers, cargo and equipment.

  • When properly equipped; includes weight of vehicle, passengers, cargo and equipment.

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