2003 Gmc Sierra 2500 Crew Cab Duramax 4wd Diesel Automaticvincent Motor Company on 2040-cars

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GM delays 3.0-liter Duramax diesel in Silverado and Sierra pickups

Stricter testing protocols around the world are making it harder for automakers to predict launch timelines. GM is the latest to get caught in emissions nettles, the Detroit carmaker forced to delay the launch of its new Duramax 3.0-liter inline-six diesel for the Chevrolet Silverado 1500 and GMC Sierra 1500. That's what company reps told dealers in a memo seen by Automotive News this week. Dealers and buyers had been promised the Flint, Mich.-built oil-burner in early 2019, but AN wrote that the EPA certification hiccup has turned into a "slight delay." A GM spokesman told Motor1, "[We] did not attribute [the delay] to a single entity, as the truth is this is a collaborative effort between GM and several government entities. We will make the 2020MY Duramax available for dealers orders soon, and expect to deliver the first trucks to customers soon after emissions testing is complete." We know the new 3.0-liter Duramax diesel has 277 horsepower and 460 pound-feet of torque, outdoing Ford's 3.0-liter PowerStroke diesel by 27 hp and 20 lb-ft. But without final EPA paperwork, GM can't release the numbers that will show how the two engines stack up when considering fuel economy and tow ratings. The certification process has been sticky for a few other makers of late, especially since the Volkswagen Group situation in 2015. BMW had to delay the launch of four diesel models in 2016 over EPA testing. The new Ram 1500 dribbled out in a trickle last year for reasons thought to deal with EPA testing, coming as it did a year after the EPA investigated Ram's EcoDiesel engines in 2017 and 2018. More recently, WLTP testing in Europe caught out just about every automaker over there. Since we're almost halfway through 2019, the delay until the 2020 model year is only a few months. Still, GM told dealers to cancel any orders for the engine for this model year. Dealers will need to resubmit the orders once opening begins, but GM hasn't said when production will begin other than "soon." The company said that it will offer 2020-model-year replacement vehicles to customers and dealers. If prices hold into the next model year, the 2020 Silverado 1500 and Sierra 1500 with the inline-six diesel will come at a $3,890 premium over the 2.7-liter turbo four-cylinder, and a $2,495 premium over the 5.3-liter V8.

GM considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.

GMC's Bronco-slaying SUV will remain a dream, report says

GMC won't help rival Ford in its quest to dethrone the Jeep Wrangler, according to a recent report. The body-on-frame off-roader the firm planned as an alternative to the upcoming Bronco and the fourth-generation Wrangler allegedly fell victim to a top-down restructuring plan implemented recently by parent company General Motors. Citing anonymous inside sources, Muscle Car & Trucks reported the rugged SUV remained part of GMC's long-term product plan until November 2018. It was shaping up to be one of the company's most distinctive models in decades. It should have arrived as a dedicated off-roader developed and sold exclusively by GMC; it wouldn't have had a twin in the Chevrolet portfolio. The problem, according to the report, is that the off-roader (which might have revived the heritage-laced Jimmy nameplate) should have been built on the 32XX platform designed to underpin the next Chevrolet Colorado/GMC Canyon twins. General Motors canceled that project to save money, so the SUV was consigned to the attic before we even spotted prototypes testing on and off the pavement. The updated pickups will instead arrive on an evolution of the frame found under the models currently found in showroom. There's no word on why that architecture can't support a Wrangler-like SUV. GMC never confirmed plans to build an off-roader aimed at the Jeep Wrangler and the upcoming Ford Bronco, so it certainly won't validate reports claiming it has canceled the model. This isn't the first time we've heard about a body-on-frame SUV made by a brand in the General Motors portfolio, though. Hummer was supposed to take the fight directly to Jeep with an off-roader accurately previewed by the 2008 HX concept, but it shut down before it finished developing the model. Rumors of GMC picking up where Hummer left off have come and gone on a shockingly regular basis over the past few years, yet the Wrangler remains in a class of one.