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TOW LIKE A PRO AT Shortline Buick GMC 

Get Trailering Tips and learn about a new GMC Sierra HD in Denver, Colorado

GMC SIERRA HD - CAPABILITIES YOU CAN COUNT ON

See the 2020 GMC Sierra HD AT4 at Shortline Buick-GMC
    View the 2020 GMC Sierra HD Denali at Shortline Buick-GMC
      View the 2020 GMC Sierra HD SLT at Shortline Buick-GMC
        View the GMC Sierra HD at Shortline Buick-GMC

          SIERRA HD - POWER AND PERFORMANCE

          At Shortline Buick GMC your Sierra HD gets its heavy-duty power from a proven source, the available Duramax 6.6L V-8 Turbo Diesel with 910lb-ft. of torque and 445 hp under your right foot. Prefer your power gasoline fueled? Sierra HD comes standard with the force and efficiency of a 360-hp Vortec 6.0L V-8. Sierra HD has the power to get you up Vail Pass, Monarch Pass, Berthoud Pass without the sweat!
          • Hood-Scoop Induction System provides Cooler Induction Air Temperatures to Maximize Horsepower (Duramax)
          • Large Radiator Capacity for Excellent Cooling Performance (Duramax)
          • Allison® 1000 Series 6-Speed Automatic Transmission (Duramax)
          Feel the power...stay cool...all with the help of your Sierra HD truck!

            IT'S NOT JUST HOW MUCH YOU TOW. IT'S HOW WELL YOU TOW.

            The Colorado GMC Sierra HD Reputation Follows Us

            At Shortline Buick GMC we believe that it’s not just how much you tow, it’s how well you tow that matters. That’s why Sierra HD’s available Duramax Diesel combined with seamlessly integrated trailering technologies generate the confidence to control heavy loads, especially in challenging Colorado mountain situations. Because GMC is not only building Professional Grade trailering machines, they are building confidence in those who drive them. Towing up Vail Pass and even over to Four Corners has never been easier then with the help of GM Sierra HD!
            Learn about trailering with the Sierra HD at Shortline Buick-GMC

            GOOSENECK/FIFTH-WHEEL PREP PACKAGE

            Available on all cab and box types, this package includes a box-mounted seven-pin trailer harness and hitch platform to fit a gooseneck or fifth-wheel hitch for factory-installed durability.  Colorado fifth-wheel owners love GMC Sierra HD...GMC Sierra HD loves Colorado outdoor enthusiasts.

              PREMIUM TRAILERING MIRRORS

              The available heated, power-adjustable trailering mirrors include segment-first LED rear guidance lamps. The lamps are integrated into each mirror to enhance trailer visibility when backing up. Also included are amber auxiliary clearance lamps. When equipped on All Terrain, SLT and Denali models, the mirrors include driver memory and can also power-fold to help in car washes and other tight places.

                DIESEL EXHAUST BRAKE SYSTEM

                The available switch-activated Diesel Exhaust Brake System offers exhaust braking capability at low engine speeds. It’s combined with the Allison 1000 transmission’s Tow/Haul mode and Automatic Grade Braking features to reduce the amount of conventional braking needed while trailering or traveling downhill.  'Oh My God Road' has been renamed 'Oh, Got My Sierra HD Road'...Sierra HD makes traveling Colorado mountain roads easy!

                  TRAILERING CAMERA SYSTEM

                  This available Shortline-installed accessory system produced by EchoMaster® provides several vantage points for confident trailering. Integrated into Sierra’s center screen, the system offers multiple simultaneous views around Sierra. See Shortline Buick-GMC for the ultimate experience in trailering cameras.

                    TRAILER BRAKE CONTROLLER

                    For control and easy monitoring of your trailer brakes, Sierra HD offers an available integrated trailer brake controller. It’s located high and in easy reach of the steering wheel for quick adjustments and is included on SLE, SLT, Denali and 3500HD models at Shortline Buick GMC.

                      REAR VISION CAMERA SYSTEM

                      The center screen serves as your monitor for the Rear Vision Camera System. Its dynamic grid lines help when backing up or hitching a trailer. Come see this camera system at Shortline Buick GMC!

                        TRAILER SWAY CONTROL

                        Helps keep both Sierra HD and your trailer heading in the same direction, automatically. Sensors help detect a swaying trailer, and the system helps bring it back in line by applying both the truck’s and the trailer’s brakes (when properly equipped).

                          TOW/HAUL MODE

                          To accelerate when trailering or hauling heavy loads, Tow/Haul mode raises transmission upshift points. It also raises downshift points using engine compression to help slow your Sierra HD instead of merely braking.

                            HILL START ASSIST

                            To give you extra time to switch from the brake pedal to the accelerator on a 5 percent grade or more, Hill Start Assist holds the brakes momentarily to help prevent rolling back.

                              TRANSMISSION TEMPERATURE GAUGE

                              Located in the Driver Information Center (DIC), it allows you to monitor the transmission fluid operating temperature in real time. Stay cool...enjoy the ride in your GMC Sierra HD from Shortline!

                                VIEW GMC SIERRA HD INVENTORY AT Shortline Buick GMC 

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                                                    COLORADO TRAILERING TIPS FROM SHORTLINE

                                                    GMC Sierra HD Equipped to Pull You Trailer/5th Wheel

                                                    SIERRA HD - ACCELERATING/BRAKING

                                                    Avoid overworking your engine when trailering by applying gradual pressure on the accelerator. Allow your vehicle to safely reach a comfortable driving speed. Give yourself extra time and room when merging onto highways. Braking when pulling a trailer requires extra distance. Allow ample room to come to a safe stop. A good measure for determining a safe following distance is to allow one vehicle and trailer length between you and the vehicle ahead for every 10 mph of speed. When braking, use firm, steady pressure on the brake pedal.

                                                      SIERRA HD - CORNERING

                                                      The turning radius of a trailer is typically much smaller than that of your vehicle; therefore, a trailer may hit soft shoulders, curbs, trees or other objects when making tight turns. Taking turns sharply can also cause the trailer to strike against and damage the tow vehicle. When approaching a sharp corner, brake sooner than normal to reduce vehicle speed before entering the turn. Drive the vehicle slightly past the normal turning point and then firmly turn the steering wheel. By cornering at a wider angle, both vehicle and trailer should safely clear the inside of the turn.

                                                        SIERRA HD - Passing

                                                        When passing, allow additional time and distance to safely pass the other vehicle. Signal your intention to pass well in advance and, when re-entering the lane, make certain your trailer is clear of the vehicle you have passed. Never pass on hills or around curves.

                                                          LEAVING PARKING SPOT ON GRADES

                                                          • Hold the brake pedal down and start the engine.
                                                          • Shift into gear and release the parking brake.
                                                          • Release brake and drive uphill slightly until free from the blocks.
                                                          • Apply brakes and have someone retrieve the blocks.

                                                            SIERRA HD - BACKING UP

                                                            To back up a trailer, place one hand at the 6 o’clock position on the steering wheel. To move the trailer to the left, move your hand to the left. To move the trailer to the right, move your hand to the right. Back up slowly, and move the steering wheel in small increments to help maintain control. To assist in backing up, it is helpful to have someone outside the vehicle to guide you. Make certain you can see your spotter at all times.

                                                              PARKING ON GRADES

                                                              Parking on steep grades with a trailer is not recommended. If you must, follow this procedure:
                                                              • Apply the brakes and shift into neutral.
                                                              • Have someone block the trailer’s wheels on the downgrade side.
                                                              • Release the brakes until the blocks absorb the load.
                                                              • Apply the parking brake and shift into park.

                                                                DRIVING ON GRADES

                                                                Before going down a steep incline (Oh My God Road), reduce your speed and shift the transmission into a lower gear. This provides “engine braking” and reduces the need to brake for long periods. When driving up Oh My God Road, shift to a lower gear for more torque to maintain speed and avoid lugging. Lugging occurs when the vehicle’s engine stutters because it needs to be in a lower gear. Crest the hill no faster than the speed at which you want to descend and in the gear you expect will require little braking. Pay attention to your temperature gauges for any signs of overheating.

                                                                  SIERRA HD - OVERHEATING

                                                                  Prolonged driving with overheated fluids can cause damage to your vehicle. If temperature gauges register abnormally high, if there is a marked decrease in power or if you hear unusual engine noises, immediately take the following steps:
                                                                  • Pull your vehicle to the side of the road. Once stopped, shift into park (automatic transmissions) or neutral (manual transmissions) and apply the parking brakes. Leave the engine running.
                                                                  • Turn off air conditioning and other accessories to reduce load on the engine. Roll down the windows and turn the heater on to maximum and the fan to its highest setting. The heater core provides a second cooling surface that can help reduce engine temperatures.
                                                                  • If you suspect that the overheating is the result of climbing a long, steep grade, run the engine at fast idle (around 1,500 rpm) until the temperature gauge registers a normal reading.
                                                                  • With the vehicle in park or neutral and the parking brake engaged and being mindful of traffic, exit your vehicle and look for steam or leaking coolant underneath the engine. If you see either of these, shut the engine off and allow the engine to cool. To avoid being burned, do not attempt to remove the radiator cap until the engine has cooled.

                                                                    CONTROLLING TRAILER SWAY

                                                                    Most GMC vehicles at Shortline Buick GMC feature Trailer Sway Control to help keep you and your trailer heading in the same direction. The system uses StabiliTrak sensors to detect excessive trailer sway, applying both the vehicle’s and trailer’s brakes (if properly equipped) to bring it back in line. Sway refers to instability of the trailer relative to the trailer vehicle and often results from improper weight distribution, excessive speed or overloading. Other factors can cause sway: crosswinds, poor vehicle maintenance and road conditions. Trying to steer out of sway likely will make it worse. Speed is a major contributor to trailer sway, so you need to slow the vehicle—braking, however, could lead to a jackknife or other loss of control. To control sway: 
                                                                    • Hold the steering wheel as steady as possible.
                                                                    • Release the accelerator but do not touch the brake pedal.
                                                                    • Activate electric trailer brakes (if equipped) by hand, until the sway condition stops.
                                                                    • Use the vehicle brakes to come to a complete stop.
                                                                    You should then pull your vehicle to the side of the road and attempt to determine the cause of the instability. Check the cargo load for shifting and improper weight distribution. Check tire pressure on the tow vehicle and trailer, and the condition of the suspension and shocks. If the sway was caused by strong winds, wait for conditions to improve before continuing your trip. Finally, some trailers can be equipped with mechanical anti-sway devices. Contact Shortline Buick GMC for more information.

                                                                      Contact Shortline Buick GMC 

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