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Performance Upgrades For 3.0 Duramax – Official 2021 Chevy Tahoe and Suburban diesel EPA fuel economy estimates revealed
A key feature of the updated GM full-size SUVs, including the 2021 Chevrolet Tahoe and Suburban and the 2021 GMC Yukon and Yukon XL, is the addition of a 3.0-liter Duramax inline-6 (borrowed) turbo diesel engine. from Silverado/Sierra pickups). Now we have EPA estimates for the new diesel’s fuel economy, and as expected, it’s a significant improvement over the next most efficient engine, the 5.3-liter V8.
Performance Upgrades For 3.0 Duramax
The 2021 Chevrolet Tahoe 2WD is rated at 21/28 mpg city/highway and 24 mpg combined. The 4WD Chevrolet Tahoe diesel is rated at 20/26 mpg and 22 mpg. That’s a big advantage over the 5.3-liter V8-powered Tahoe, which is EPA-estimated at 16/20 mpg city/highway and 18 mpg combined (2WD or 4WD).
The Ins And Outs Of Gm’s Duramax Diesel 3.0
The Grand Suburban with 2WD and diesel gets an EPA-estimated 21/27 mpg city/highway and 23 mpg combined. Compare that to 16/20 mpg and 18 mpg for the Suburban 5.3-liter V8.
With 4WD, the 2021 Suburban diesel figures are 20/26 mpg city/highway and 22 mpg combined. Again, that’s significantly better than the 4WD Suburban’s 5.3-liter V8, with 15/19 mpg and 17 mpg combined.
On the GMC, the Yukon 2WD’s highway and combined estimates are 1 mpg less than its Chevy sibling, 21/27 city/highway and 23 mpg overall. The Yukon XL 2WD has the same EPA numbers as the smaller Yukon. EPA figures for the 4WD GMC for both the Yukon and Yukon XL are 20/26 mpg city/highway and 22 mpg combined.
Looking at the closest competitor to GM SUVs, the Ford Expedition (with a 3.5-liter turbocharged V6) gets 17/23 mpg (RWD) and 17/22 mpg (4WD). The larger Expedition Max is 17/22 mpg (RWD) and 16/21 mpg (4WD).
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GM’s Duramax diesel engine produces 277 horsepower and 460 pound-feet of torque, with a towing capacity of 8,000 pounds with the Suburban and 8,200 pounds with the Tahoe (RWD). That’s $995 more than the 5.3-liter V8, but buyers of the diesel-net High Country, which comes standard with the 6.2-liter V8, opt for a $1,500 credit.
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We’ve got detailed information on Chevrolet’s 2023 Silverado 1500 ZR2 Bison, and it’s interesting information about the 3.0-liter Duramax I-6 diesel engine.
The second-generation L70 turbodiesel is assembled at GM’s engine operations in Flint, Michigan, with a 10 percent increase in horsepower (from 277 hp to 305 hp), a 7.6 percent increase in torque (up from 495 lb-ft to 460 lb-ft), and Thanks to the updates in the sections:
Chevrolet Silverado Includes An Updated Duramax Diesel Engine
The revised oil burner is available on the Silverado 1500’s Custom, Trail Boss, LT, RST, LT Trail Boss, LTZ and High Country trims, and is still connected to a 10-speed automatic transmission to complement the dynamic engine.
“These improvements to the popular 3.0-liter Duramax diesel engine build on the already refined design of the first-generation engine,” said John Barta, assistant chief engineer, diesel engines. “We often hear from customers that they are satisfied with the excellent fuel economy and smooth, quiet power of the current diesel engine, so we look forward to experiencing this advanced engine made possible by continuous design evolution and advances in engine technology.” The 3.0 Duramax LM2 was introduced in 2019. . It produced 277 horsepower and 460 lb-ft of torque. As with all diesels and trucks, performance upgrades for added power, towing, fuel economy and handling are common and highly desirable.
The LM2 Duramax is only a few years old – most of these trucks are still under warranty, so it will obviously take some time for performance parts to enter the market. However, the biggest deterrent to mods and upgrades for LM2 is matchmaking. As of March 2023, no company has cracked the ECM for the 3.0 Duramax, meaning there is no tuning solution. Changes in performance without tuning tend not to lead to significant performance gains.
With the Duramax LM2 now available for tuning, we expect the platform’s components to bring the developing performance market to a higher level. It’s ready for the end user before everything is finished from scratch. So we bring you a guide to improve the performance of LM2. As new products develop and tuning capabilities advance, we’ll be updating this article with all the best 3.0 Duramax mods.
Banks Turnkey Engine Program
The Duramax LZ0 is still very new and aftermarket support is very limited, so we will write a separate guide for the LZ0 models as options become available.
Energy constraints on LM2 are still largely unexplored. Currently, the tuning options are said to only add around 50whp, suggesting that the turbocharger will be the initial limitation and an early upgrade will be needed for more power. The LM2 factory turbo is quite small, and early R&D found that to be the first hurdle.
Furthermore, these engines suffer from several common problems with injectors and injection pumps. We don’t know of anyone who has tested the power limits of these, but the issue on their stock truck leads us to assume that a fuel upgrade will be necessary after the turbo upgrade.
For reference, the stock LM2 dyno is approx. 250 m.h and 400 w. With the models we’ll cover below, you’ll add 50-60whp depending on tuning. We’re sure the engine is strong enough internally to handle all these upgrades.
Common Duramax Diesel Problems, Troubleshooting, And Solutions
At the moment there are only 3 worthwhile changes. We’ll be looking at a few additional modifications, such as coolers, pipe kits, and resonator removal, but these haven’t yielded any worthwhile performance gains yet. This may change as turbo upgrades and more advanced models become available, but for now we recommend tuning, intake and exhaust.
HP Tuners is currently the only software that can tune the 3.0 Duramax. Throttle sensor products such as Edge’s Pulsar LT and Banks PedalMonster are available, but don’t confuse them with tuning.
Engine tuning and transmission tuning can be done through HP Tuners, and several companies such as PPEI and RunVSE are starting to offer tuning services for them. The downside is that the ECM and TCM must be unlocked to match these components. Unless you belong to a shop that does 3.0 Duramax tuning, you will need to remove the ECM and/or TCM and send it in for unlocking.
Depending on whether you want the transmission tuned or not, the price for a tune-up will be between $1,500 and $2,000. In addition to Aya, EMC and TCM unlocks, you’ll also need HP Tuners MPVI3 and 6-10 flashing credits. If you have the equipment and a loan, you can reduce the cost by up to $1,000.
Cold Air Intake For 2020 2023 Silverado, Sierra 1500 / Tahoe, Yukon, S
“Cool air” might not be the right term, but the second best upgrade is the intake system. Engines require more air to produce more power. A turbocharger will need more air to improve its efficiency and reduce the stress caused by high acceleration levels.
Application updates without tuning often provide very limited performance. However, tuning will increase the efficiency gain and provide a solid power boost while taking some stress off the engine and turbo.
S&B’s application is currently the best on the market and the only one on the market. It is the most affordable at $349.
No exhaust system is usually the best exhaust system for a turbocharged car. The lower the pressure after the turbo, the more efficient the turbo will be, resulting in more power. We recommend upgrading the downpipes as they usually provide the best performance in turbo engines. For the 3.0 LM2, the only option currently is a cat-back system. Rumor has it that there is a removal kit on the market, but we will refrain from commenting on that.
Chevrolet Silverado’s New, Advanced 3.0l Duramax Turbo Diesel Redefines Expectations
Since we let in more air with consumption
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