2003 Gmc Sierra 2500hd Extended Cab 4x4 Bi-fuel Cng/gasoline on 2040-cars

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GMC Hummer EV EarthCruiser upfit finally here, for going out there

The GMC Hummer EV EarthCruiser upfit can now be seen in the wide open bright light, the battery-electric overlanding rig soon available to Hummer EV pickup owners to head back into the bush for extended stays. The camper's made of carbon fiber and features EarthCruiser's hallmark pop-top roof. When closed, the camper takes the Hummer EV's 79-inch stock roof height up to 90 inches. Springing the three-layer, insulated roof to bivouac increases height to 117 inches. The upfit keeps the Hummer EV's 217-inch length, and it appears the side storage bins don't extend beyond the 87-inch width of the electric pickup's wheel arches. The driver's side exterior bin holds recovery gear, the passenger's side storage holds tanks for filtered water.  Sized to sleep two people, there's a full-sized RV bed with 35 inches of headroom under the raised top. Tall outdoorsy types are well served by the 76 inches of headroom standing in the hallway, and 80 inches at the rear entrance. Power comes from 605 watts of solar panels on the roof, energy stored in a 12-volt lithium battery array that adds up to 6 kilowatt-hours or 460 amp-hours of energy, running through a 1,500-watt inverter. EarthCruiser says the batteries will be enough to juice hungry appliances like the refrigerator/freezer combo for about a week. That means owners would need to be more careful with water than with power, there being a 13.5-gallon freshwater tank — which the sun can't refill — and a seven-gallon gray water hold. Other amenities include an induction cooktop, sink, filtered and unfiltered water taps, flat-pack toilet, indoor and outdoor showers and 12-volt water heater, 120-volt and 12-volt outlets, and lots of dimmable lighting. Liveaboards control the interior through a seven-inch touchpad. Outside, an exterior keypad manages exterior lighting and systems. No mention of an indoor heater, but there's plenty of storage in the galley drawers and cabinets, and under the bed for a portable unit.   The GMC Hummer EV EarthCruiser upfit greets the public at this weekend's Overland Expo Mountain West in Loveland, Colorado, welcoming all gawkers from August 25-27. Pricing should come later this year, before EarthCruiser begins offering the unit to owners next year. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

GM recalls 668,000 SUVs due to faulty anchor bars for child seats

DETROIT — General Motors is recalling more than 668,000 small SUVs in the U.S. because owners may not be able to hook child seats to the anchors. The recall covers certain 2020 to 2023 Chevrolet Equinox and GMC Terrain SUVs. The National Highway Traffic Safety Administration says in documents posted on its website Thursday that the rear-seat lower anchor bars may have had too much powder coating. That could make them too thick and prevent a child seat from being installed. GM says no crashes or injuries have been reported. The automaker is asking owners to install child seats using the seatbelts until the latches are repaired. Dealers will inspect the anchors and replace the finish if necessary. Owners will be notified by letter starting June 26.   Recalls Chevrolet GM GMC SUV child safety car seat