2001 Jimmy 4x4 Manual 5 Speed High / Low Range Transmission 4 Four Wheel Drive on 2040-cars

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Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

2018 Ford Expedition vs other big SUVs: How it compares on paper

With our Alex Kierstein rightly impressed in his first-drive review of the new 2018 Ford Expedition, we decided to dig a little deeper into the numbers, and we came up with the spreadsheet below to highlight how the new 2018 Expedition compares on paper to its main full-size SUV competitors: the 2018 Chevy Tahoe and Suburban (and therefore the 2018 GMC Yukon), 2018 Toyota Sequoia and 2018 Nissan Armada. We also threw in the new, even bigger 2018 Chevrolet Traverse since, as you'll see, its massive dimensions should put it on the radar for anyone who needs loads of passenger and cargo space but doesn't care as much about towing. A few notes about the chart above. First, the 6.2-liter V8 that's included with the new-for-2018 Tahoe RST trim level is the standard engine on the GMC Yukon Denali. You can apply most of the Tahoe's numbers to the entire Yukon and Yukon XL lineup. Second, though we highlighted categories where the Traverse led, we also highlighted the runner-up full-size SUV, since this was ultimately about that segment. Traverse numbers are broadly applicable to the new Buick Enclave. Related Video: Chevrolet Ford GMC Nissan Toyota SUV Comparison consumer ford expedition gmc yukon chevy traverse toyota sequoia nissan armada chevrolet tahoe ford expedition max

2021 GMC Sierra adds towing tech, new HD Black Diamond Edition

Trailer towing is the focus of several new technologies coming to the 2021 GMC Sierra pickup, with the new features available both on the Sierra 1500 and the Sierra HD. The 2021 Sierra also sees expanded availability of GMC's MultiPro tailgate, a price cut for the available 3.0-liter Duramax turbodiesel six, and a new Black Diamond Edition of the Sierra HD. Pickup truck makers are engaged in a trailering-technology arms race. Already, the GMC Sierra offers its ProGrade Trailering package that features a "Transparent Trailer" virtual camera view and a Rear Trailer View that uses an auxiliary camera mounted on the back of the trailer. To that, GMC is adding a Trailer Length Indicator that can alert drivers of another vehicle in the adjoining lane during a signaled lane-change. A new Jack-Knife Alert warns the driver if the front of the trailer approaches the rear of the tow vehicle. The warning appears in the center screen and can also trigger a seat vibration. The previous Rear Side View split-screen now also works when reversing and adjusts for the angle of the trailer. The Cargo Bed View now includes a zoom feature and hitch guidance for connecting gooseneck trailers. Finally, the previous Rear Trailer View adds a trailer-angle indicator and dynamic guidelines. In other equipment news, the six-position MultiPro tailgate is newly available on the Sierra 1500 SEL and Elevation trims and standard on the Sierra HD SLE. The fancy Sierra HD Denali adds Surround Vision and Bed View cameras to the standard-equipment list. Standard and optional engine choices for the Sierra are unchanged for 2021, but the price of the optional 3.0-liter turbodiesel engine in the Sierra 1500 is reduced by $1,500. For 2021, on models where the 5.3-liter V8 is standard (SLT, AT4, and Denali), the upcharge will be $995. For the SLE and Elevation, where the 2.7-liter V6 is standard, the cost to upgrade to the diesel is now $2,390, again a decrease of $1,500. Lastly, the Sierra HD adds a Denali Black Diamond Edition. It includes 20-inch gloss-black wheels, power-retractable side steps, premium audio by Kicker, an Auxiliary Trailer Camera, trailer tire-pressure monitor sensors, and premium floor mats with removable carpet inserts. It comes in any color you want so long as it's Ebony Twilight Metallic. The Black Diamond Edition is pictured above. Related Video: