Truck Engine Thread: Cylinder Deactivation, Start/Stop, Direct Injection

[Bill]

I get the quest for better mileage, valid goal, but things seem to have really gone off the rails. Take GM's 2.7l 4 cylinder turbo....in full size trucks. This engine has cylinder deactivation, meaning you're running your full size truck on the highway.....on TWO cylinders. Really? Can I predict massive failure in GM's future? Both GM and Dodge have failed with this technology in their V8 offerings.

https://gmauthority.com/blog/2021/09...-torque-boost/

With the introduction of the 2022 Chevy Silverado, the pickup’s turbocharged 2.7L I4 L3B gasoline engine now produces 420 pound-feet of torque at 1,500 rpm, a 72-pound-feet increase compared to the previous model’s 348 pound-feet. That’s 20 percent more than the 2021 model year. Meanwhile, horsepower remains unchanged at 310 ponies at 5,600 rpm.
Refreshed 2022 Chevy Silverado Turbo 2.7L L3B Engine Specs 2022 Silverado 1500 Limited Refreshed 2022 Silverado 1500
Power (hp / kw @ rpm) 310 / 231 @ 5,600 310 / 231 @ 5,600
Torque (lb.-ft. / Nm @ rpm) 348 / 473 @ 1,500 to 4,000 420 / 569 @ 3,000
Towing Capacity (lb. / kg) 9,600 / 4,354 9,500 / 4,309

Despite this massive increase in torque, refreshed 2022 Chevy Silverado 1500 models equipped with the turbo 2.7L I4 L3B boasts a 9,500-pound towing capacity when configured with two-wheel drive, or 100 pounds less than with the 2021 and pre-refresh 2022 models.

For those buyers that need extra towing capacity, the 2022 Chevy Silverado 1500 once again offers the 3.0L I6 LM2 turbodiesel Duramax, which now offers up to 13,300 pounds of towing for the 2022 model year.

The turbocharged 2.7L I4 L3B connects to an eight-speed automatic transmission, which was revised for the 2022 Chevy Silverado 1500 to offer smoother shifts, as well as quicker downshifts.

Further updates for the 2022 model year include a completely overhauled interior, equipped on LT trim levels and above. The new cabin features a 13.4-inch color touchscreen as standard on LT, RST, LT Trail Boss, LTZ, and High Country trim levels, plus the new ZR2 off-roading trim. Further tech features in the cabin include a 12.3-inch configurable instrument cluster offered as standard on all models with the new interior, as well as Google-powered features like Google Assistant, Google Maps, and Google Play. High Country trim levels will also offer the GM Super Cruise semi-autonomous driver-assist system.

Subscribe to GM Authority for more Chevy Silverado news, Chevy news, and around-the-clock GM news coverage.

I'm going to pull 9,500 lbs and a full size pickup with a 4 cylinder engine?

[Bill]

Chevy 1500 2.7L TURBO 4 Cylinder (L3B) **Heavy Mechanic Review** | Should You Buy It ?? - YouTube

Which Silverado Engine Is Best? Let's Find Out! - YouTube

[LATB]

Super Duty Diesel.
No cylinder deactivation or stop & start bullchit.
Also, the transmission shifter is on the column where it belongs in a pickup truck.

[GTOguy]

Wait until they go 100% electric. In like 5 to 10 years. Ford. Gm. All of the automakers marching to the woke agenda will go bust and people like myself will continue to operate and maintain fully functional decades-old vehicles. I can say for a fact that the start/stop/cylinder-drop mechanicals and electricals are to appease the government and really are of no real world benefit. On the contrary, starters ($$$$) fail at a much, much higher rate as do the whistles and bells needed to manage the system. All this foisted on the public. My newest Truck is an '05 and my newest car is a '67----for a reason. I like to not spend $$$$ on parts and I like reliability.

[6spdC6]

Originally Posted by GTOguy

Wait until they go 100% electric. In like 5 to 10 years. Ford. Gm. All of the automakers marching to the woke agenda will go bust and people like myself will continue to operate and maintain fully functional decades-old vehicles. I can say for a fact that the start/stop/cylinder-drop mechanicals and electricals are to appease the government and really are of no real world benefit. On the contrary, starters ($$$$) fail at a much, much higher rate as do the whistles and bells needed to manage the system. All this foisted on the public. My newest Truck is an '05 and my newest car is a '67----for a reason. I like to not spend $$$$ on parts and I like reliability.

You would think they would have learned something with that awful 4-6-8 Cadillac of years back.

[GTOguy]

Originally Posted by 6spdC6

You would think they would have learned something with that awful 4-6-8 Cadillac of years back.

I used to have to 'fix' those. The fix was eliminating the feature and returning it to a full time V8. That didn't help those cars much, though, as they were crap, just like every Cadillac built after 1979.

Heard a guy on the radio the other day complaining about the starter failing on his new 'start/stop' car and how it was $$$ to have replaced. Said he is in a stop and go commute and his starter has to start the car over a hundred times each way to work. Can you imagine? His starter gets more wear and tear in a single day than mine does in 2 years of driving. Like ethanol fuel and wind power, and EV's, it's a big lie that can't be supported by facts and physics.

[m and t's77]

Got this gizmo to keep my GMC truck in full V-8 mode.

https://www.rangetechnology.com/prod...-dfm_disabler/

Wife's BMW has a real rocker switch to keep the start/stop bs off.
Been that way since day 1 of buying it.I just replaced and programmed the battery after 8 years of service.

[Rodnok1]

4-6-8 were a pig even on all 8. They way gm killed the cylinders was horrible and engine would feel like it's coming apart to me.
I wouldn't buy gm products with their lifter issues. Those were a failure waiting to happen.
That start/stop is bad enough with the stress it puts on starters and batteries.
All this shit in the name of fuel economy. "it'll save the consumers money" bullshit. Doesn't save a dime and costs too much up front.

[GTOguy]

Originally Posted by Rodnok1

4-6-8 were a pig even on all 8. They way gm killed the cylinders was horrible and engine would feel like it's coming apart to me.
I wouldn't buy gm products with their lifter issues. Those were a failure waiting to happen.
That start/stop is bad enough with the stress it puts on starters and batteries.
All this shit in the name of fuel economy. "it'll save the consumers money" bullshit. Doesn't save a dime and costs too much up front.

Over 40 years ago, as a tech, I learned that US cars used the consumer as their test bed for quality control on new tech, and Cadillac was the worst. About that time, I started to realize that the Japanese never released a car to the public that wasn't proven at the factory beforehand. That's when the Japanese cars really started to take off. And they are still the best in the world.

[Rodnok1]

My dad worked at a GM plant and we'd get test mules once a year or so to drive for 2 or 3 weeks. Kept a log of mileage and issues. One Buick took a shit after 2 or 3 days.
We had the 4-6-8 Caddy... Both test mule and used one, both were dogs and plagued with issues those years.

[Bill]

Originally Posted by m and t's77

Got this gizmo to keep my GMC truck in full V-8 mode.

https://www.rangetechnology.com/prod...-dfm_disabler/

Wife's BMW has a real rocker switch to keep the start/stop bs off.
Been that way since day 1 of buying it.I just replaced and programmed the battery after 8 years of service.

I assume that plugs into the OBDII port like a tuner? Does it stay in place, or do you plug it in, it does it's work, then you remove it?

[6spdC6]

I found this company name in my desk, not sure if its still available.

''AutoStop Eliminator" Supposed to stop that nonsense!

[bsmith]

Originally Posted by m and t's77

Got this gizmo to keep my GMC truck in full V-8 mode.

https://www.rangetechnology.com/prod...-dfm_disabler/

Wife's BMW has a real rocker switch to keep the start/stop bs off.
Been that way since day 1 of buying it.I just replaced and programmed the battery after 8 years of service.

I bought one for my Camaro, years ago.
Threw codes constantly.

When I bought my truck, I bought one without AFM/DFM and start- stop.

Even without that feature, range device, or pulsar, you can still have lifters fail.

[Frankie the Fink]

Usually within a few months of its inception on a new model Auto Start/Stop and VCM (Variable Cylinder Management) generally have aftermarket devices to disable them, already the case with major marquees' products.

[m and t's77]

Originally Posted by bill_daniels

I assume that plugs into the OBDII port like a tuner? Does it stay in place, or do you plug it in, it does it's work, then you remove it?

Stays plugged in at all times

Originally Posted by bsmith

I bought one for my Camaro, years ago.
Threw codes constantly.

When I bought my truck, I bought one without AFM/DFM and start- stop.

Even without that feature, range device, or pulsar, you can still have lifters fail.

Got it more for the trans to not bang in and out of gear because of switching from v4/v8.Has yet to throw any codes.

[bsmith]

Originally Posted by m and t's77

Stays plugged in at all times


Got it more for the trans to not bang in and out of gear because of switching from v4/v8.Has yet to throw any codes.

Very few have issues with the range module, I was just a lucky one.
They had me send it back to be reprogrammed, so would not work on my particular car.

[GTOguy]

I'll also say this, as an ex tech with motorcycle, auto, truck, etc. experience: the smaller but more high performance engines, such as motorcycle or turbo 4 cylinder 4 valve per cylinder jobs, are always operating at or close to their stress limit. They are high-strung and have to be to make the power they do from such a small size. The benefit is light weight and economy. The penalty is shorter service life and expensive repairs. In my world, I am better off with a pickup truck with a V8 engine that doesn't have to work to death to make adequate power to tow with or haul loads. A manual trans or simple 4 or 5 speed auto with overdrive and a mechanical limited slip rear end. Nothing else needed or wanted. All of the intrusive and active engine, transmission, brake, steering, and driver management items are like the spout on the latest 2 gallon gas cans---government mandated crap that makes the end-product all but un-usable.

[DAB]

i think i'll stick with my big honking 2013 2500HD gasser V8 (6.0L i think).

i'll drive my Subaru if i want to save gas getting here and there.

[jw38]

I'll stick with my TRX. 702 hp, no start/stop or cylinder deactivation bullshit!

[Mike Mercury]

direct injection has changed things; low rpm torque can now be achieved without needing 6, 8, cylinders. Now... talking daily drivers here and not racing.

Here is the engineer covering this 2.7:

YouTube (Short URL)

skip to 8:15 for internal details.

I plan on ordering a 2024 Canyon Denali (which will have this engine at the 310hp 430lb/ft level) and I have no fears.