The GMC Sierra HD lineup is poised to receive a mid-cycle refresh for the upcoming 2024 model year, featuring various enhancements to the exterior, interior, and drivetrain. We recently captured a 2024 GMC Sierra HD unit in SLT trim undergoing testing, so let’s take a look at this example in the following GM Authority Live Photo Gallery.
This particular 2024 Sierra is a 3500 HD configured in Crew Cab, Long Bed configuration, painted in extra-cost ($495) Cardinal Red paint (color code G7C).
Notably, this is a dual rear wheel (dually) unit, which is a dead giveaway that this Sierra is a 3500 HD model, given that the 2500 HD trucks can only be had with a single rear wheel layout. In addition, this Sierra 3500 HD model is equipped with 4WD.
Up front, the front fascia of this 2024 GMC Sierra HD pickup truck is completely chromed out, with the center-mounted GMC hard badge, black recovery hooks and black lower valence being the only exception. Additionally, the new headlamp design with the revised C-shaped headlamp signature is on full display.
Moving around to the side, the mirror caps, door handles, and beltline moldings are all adorned in chrome, while this unit wears the optional chrome tubular, six-inch rectangular cab length assist steps (RPO code BVQ).
Out back, we see more chrome in the form of the rear bumper, which also includes CornerStep cutouts, along with a hitch for towing. Another GMC hard badge sits front-and-center, along with a smaller SLT hard badge on the lower, passenger-side of the tailgate. It’s worth noting that this particular unit is missing the GMC MultiPro tailgate which is normally fitted as standard on the SLT.
As a reminder, the 2024 GMC Sierra HD offers two engine options. The first is the naturally aspirated 6.6L V8 L8T gasoline engine, which is standard on all trims but the range-topping Denali Ultimate trim, and produces 401 horsepower and 464 pound-feet of torque. Optional across the lineup, and standard on the Denali Ultimate, is the 6.6L V8 L5P turbodiesel Duramax, which has been uprated to 470 horsepower and 975 pound-feet of torque. As for transmission options, all models are equipped with the Allison-branded ten-speed automatic as standard.
GM Authority exclusively uncovered pricing details for the refreshed Sierra HD earlier this month, while production is scheduled to start in February.