2008 Gmc Yukon Hybrid on 2040-cars

Auto blog

GM will recall 3.5 million pickups and SUVs to fix brake issue

WASHINGTON — General Motors Co is recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and increase the risk of a crash. The recall, which covers 2014-2018 model year vehicles, including some Cadillac Escalade, Chevrolet Silverado, Chevrolet Tahoe, GMC Sierra, Chevrolet Suburban and GMC Yukon vehicles, was triggered because the amount of vacuum created by the vacuum pump may decrease over time, GM told the National Highway Traffic Safety Administration (NHTSA) in documents posted Wednesday. NHTSA opened a preliminary investigation into the issue in November 2018, and said it had reports of 9 crashes and two injuries related to the issue. It provided GM in July with additional field reports that prompted the automaker to open an investigation. The company did not immediately say on Wednesday how many injuries or crashes are linked to the issue but said it could impact braking in "rare circumstances." GM said dealers will reprogram the Electronic Brake Control Module with a new calibration that will improve how the system utilizes the hydraulic brake boost assist function when vacuum assist is depleted. GM said the vacuum assist pump, which is lubricated with engine oil that flows into the pump through a filter screen, can in some cases lose effectiveness over time, as debris such as oil sludge can accumulate on the filter screen. GM told NHTSA that prior model years used a different brake assist system design, and vehicles manufactured after 2018 were not equipped with the affected pump design. Recalls Chevrolet GM GMC

GM follows U.S. trademark for AT4X with application in Mexico

Looks like GM is preparing to return the GMC Sierra 1500 All Terrain X to the marketplace, but with a new name. GM Authority found a trademark application filed in May this year in Mexico for the AT4X moniker. This comes three years after GM filed an application with the U.S. Patent and Trademark Office for the same alphanumeric in February 2016. When GMC introduced the all-new 2019 Sierra, it changed the previous All Terrain trim name to AT4, as seen on the Sierra AT4 we called "offroad overkill." The patent filings lend credence to the idea that the previous All Terrain X trim will soon be introduced by a Sierra 1500 AT4X model.  The erstwhile All Terrain X, introduced for the 2016 model year, took the former All Terrain further into the frame of serious-looking off-roader. On top of the Z71 suspension with a two-inch lift, Rancho monotube shocks, and a locking rear differential, the X added a sport bar for offroad lights, side steps, more dirt-friendly 18-inch wheels in 265/65 mud-terrains instead of 20-inchers on 275/65 all-terrains, a performance exhaust, and a lot more black and body-colored trim. At launch, we said it was "no Raptor threat," and even though GMC launched a 2500HD version in 2017 (pictured), it likely never worried the Ram Power Wagon. We wouldn't expect the equation to change with a possible AT4X, which is a shame, since hardcore OEM offroaders are becoming bro dozers for the mature, moneyed set.

2019 GMC Sierra 1500 All Terrain spied with raised suspension, off-road tires

The 2019 GMC Sierra is here, though we've only seen the two top-tier trims, SLT and Denali. As past spy shots show, the Chevy Silverado's corporate sibling has more on the way. We now have a new batch of images showing what looks like the new All Terrain package, sort of a GMC equivalent to the Silverado's Trail Boss guise. The current All Terrain package is available in three different tiers on the Sierra SLT: All Terrain, All Terrain SLT Premium and All Terrain X. In addition to equipment from the Z71 package (skid plates, suspension upgrades), the All Terrain package adds Rancho shocks, an Eaton locking rear differential and more aggressive tires. There are some additional features and appearance changes, too. The more aggressive All Terrain X adds things like a cat-back exhaust and Goodyear Wrangler DuraTrac tires. The truck in these spy shots is definitely wearing different wheels and tires than the Sierras we've previously seen. It also looks like it's sitting a little higher, just like the Silverado Trail Boss. This also looks to be an SLT model as it doesn't have the MultiPro tailgate. Expect the 5.3-liter and 6.2-liter V8s to return, but don't rule out a diesel-powered Sierra All Terrain sometime down the line. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Featured Gallery 2019 GMC Sierra All Terrain spy shots View 9 Photos Image Credit: Brian Williams Design/Style Spy Photos GMC Truck Off-Road Vehicles gmc sierra 1500