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2024 GMC Sierra HD unveiled with new design and more powerful turbodiesel V8

The 2024 Chevrolet Silverado HD made its debut in September 2022, so it was only a matter of time before the GMC Sierra HD received a similar round of updates. Unveiled online, the truck gains a new-look design and a more powerful turbodiesel V8, among other changes. GMC developed the Sierra HD primarily for towing and hauling so the most significant changes are found under the hood. The available 6.6-liter turbodiesel Duramax V8 engine now develops 470 horsepower at 2,800 rpm and 975 pound-feet of torque at 1,600 rpm, figures that represent increases of 25 and 65, respectively, over the 2023 model and that match the 2024 Silverado HD's. GMC notes it increased low-end torque by about 25% by fitting a new turbocharger. The V8 spins the rear or the four wheels via a 10-speed automatic transmission.  On the gasoline side of the spectrum, the 6.6-liter V8's output stays flat at 401 horsepower and 464 pound-feet of torque. It's now bolted to a 10-speed automatic transmission, and replacing the 2023 truck's six-speed lets the engine run closer to its peak power for longer periods. Here again, rear-wheel-drive comes standard and a part-time four-wheel-drive system is available across the entire line-up. Properly equipped, the 2024 Sierra 2500 HD Crew Cab can tow up to 21,900 pounds. The standard 2500 HD's towing capacity checks in at 22,500 pounds (a 4,000-pound improvement), and the 3500 HD is capable of towing up to 36,000 pounds — that's nearly 13 Subaru BRZs. Buyers have a dizzying selection of trim levels and body styles to choose from. The range includes Regular, Extended, and Crew cabs as well as seven trim levels called Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate, respectively. The AT4X variant will not be available at launch, and the Denali Ultimate is new for the 2024 model year. Additionally, 3500 HD models can be ordered with dual rear wheels. What the truck looks like depends on the trim level. Broadly speaking, designers drew a more angular front end with a new-look grille, sharper-looking lights, and a redesigned bumper. New wheels are part of the update as well; the 3500 HD dually gets 18-inch polished aluminum wheels, and 22-inch units are optional on single-rear-wheel trucks. Finally, the color palette grows with six optional shades called Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic, and Downpour Metallic, respectively.

Cadillac XT5, XT6, GMC Acadia recalled for two issues

General Motors is recalling three model years of the Cadillac XT5 and XT6, and the Cadillac's GMC sibling, the Acadia. The first recall has to do with the rearview camera. On 2020- and 2021-model-year XT5s, XT6s, and Acadias optioned with Surround Vision, insufficient crimping for the coaxial cables could cause a degraded signal from the rear camera, or cause the signal to fail. With all passenger vehicles required to have a working rearview camera, that's not an ideal situation. Only crossovers with Surround Vision are affected. The population at issue counts 95,231 vehicles, build dates being: XT5s produced from May 1, 2019 to June 23, 2021 XT6s built from February 25, 2019 to June 24, 2021 Acadias built from May 6, 2019 to June 24, 2021  The automaker hasn't been informed of any crashes or injuries related to the problem, and will begin mailing letters notifying owners of the issue on November 7. The fix is a trip to the dealer to have the cables inspected and replaced if necessary. Concerned customers can contact Cadillac customer service at 800-458-8006 or GMC customer service at 1-800-462-8782, then refer to GM's recall number, N222378380. Alternatively, they can get in touch with the National Highway Traffic Safety Administration (NHTSA) Safety Hotline at 888-327-4236 (TTY 800-424-9153), or go to www.nhtsa.gov, and refer to campaign number 22V709000. Another recall concerns just the 2023 Cadillac XT5 and XT6 and 2023 GMC Acadia units that were built on August 9, 2022. That day, a printer in the Spring Hill, Tennessee, Assembly Plant malfunctioned, producing vehicle labels for the driver's side B-pillar with illegible tire size information. That's a violation of a subsection of Federal Motor Vehicle Safety Standard No. 110. Only 24 units are affected, the fix being a jaunt to the dealer for a label with readable information. Owners who don't want to wait until November for letters from GM can contact Cadillac customer service at 800-458-8006 or GMC customer service at 800-462-8782, and mention recall number N222381690. Or they can head to the NHTSA Safety Hotline at 888-327-4236 (TTY 800-424-9153), or www.nhtsa.gov, and refer to campaign number 22V708000.

2022 Chevy Tahoe, Suburban and GMC Yukon get updated transmission

General Motors' full-sized SUVs have slipped in one more change before the year turns. GM Authority reports that the 2022 Chevrolet Tahoe and Suburban, and the 2022 GMC Yukon and Yukon XL equipped with gas V8 engines, will pick up a revised ten-speed automatic transmission. The new unit carries RPO code MHS, and Chevrolet communications rep Catherine Scales told GMA the updated gearbox "allows our manufacturing and dealer teams to more easily align the specific calibration needed for the transmission and can enable OTA updates in the future." It seems GM wants to make it easier to update the transmission's tuning and calibration in the future with the automaker's networked Vehicle Intelligence Platform/Global B electronic architecture. The 10-speed auto comes bolted to the 5.3-liter V8 and the 6.2-liter V8. The 3.0-liter inline-six Duramax diesel continues with the 10-speed automatic already in use. To recap the other changes for the full-sizers, we'll start with the 2022 Tahoe and Suburban, which get a new 12.3-inch digital instrument display to replace the former 8-inch unit and physical gauges. Navigation will be standard equipment displayed on the 10.2-inch infotainment touchscreen on all trims barring the base LS. Lane-keeping assist and parking sensors are also now standard, while reverse automatic braking is added to the Enhanced Display and Alert package on the top trims. Finally, the 6.2-liter V8 option is expanded to the Z71, RST and Premier trim levels, but it requires selecting one or more packages on the Z71 and RST. Moving onto the 2022 Yukon, availability of the 6.2-liter V8 expands to the AT4 trim, and the big V8 comes with a shiny pair of exhaust finishers. Redwood Metallic paint joins the exterior color palette, more wheel options are on offer, and illuminated sill plates can gussy up the rocker panels . An Enhanced Trailering Technology Package adds 13 cameras with the option for an interior accessory camera for those with enclosed haulers. On the safety side, expect reverse automatic braking to join the list of available driver assistance features. Inside, the Yukon welcomes the 12.3-inch digital cluster, the Yukon Denali welcomes the power sliding console as a standard feature instead of a $350 option.  Related Video: