25 mpg duramax. 2 mpg at an average speed of 72.
25 mpg duramax. Last Tank: 12. Here is a pic with me and the model (same as last year) 2007 LBZ tow rig/Daily driver, stock engine 11. Oct 19, 2023 · We have a winner because the 2023 Chevy Silverado Duramax diesel has the best fuel economy. 5" lift and I re geared to 4. #6 · Jul 14, 2021. It can provide you with 30 MPG (miles per gallon) on the highway. 13 posts · Joined 2014. Best thing for mileage is to keep ur foot out of it when accelerating, particularly when towing. I think the games it plays with the computer throws it off slightly. Thats with a level kit and tires/wheels in my signature and PPEI tune set on 150 hp. Combined, it has a fuel mileage of 25 MPG. Publisher Tim Esterdahl details the trip, MPG, DEF and oil usage p Chevy 2500. 23. My truck is generally hooked to a trailer nearly full time pulling up to 20klbs. Use our handy The 2024 Silverado Duramax acted as a tow rig for us this week, and actually ended up being quite enjoyable to rack up some miles on. 30 due to towing my travel trailer and sled trailer through the mountains. The 2WD truck has an EPA rating of 33 MPG on This is because the tire pressure naturally drops 1-2 psi per month, and 1-2 psi drops for every 10-degree temperature drop in cold weather. I did upgrade cold air intact with a s/b box and I run a B5 diesel blend and Stanadyne Performance routinely. 6L L5P with 1200 total miles. Last Tank: 16. High Country. Property of zpainter1015 Oct 20, 2014 · Based on AAA's current national fuel price averages of $3. I'm thinking a cheetah, 15% injectors (needs new ones anyway), Idaho-rob tuning and cng injection. 3 mpg combined, Silverado Sep 3, 2012 · If I ran the truck at the 3rd level I got over 20mpg. 4" Aluminized DP back W/muffler 4-5 tip. 8 million miles driven in 92 GMC Sierra 2500 HDs (4. This outperforms the Ram 1500’s numbers of 20 mpg city and 25 mpg highway. 13. 9 Avg MPG. Nov 13, 2013 · Buy a dodge those guys tell me they get 25 mpg empty and 15 mpg pulling all at 75 mph. Towing up to 10k lbs i got 12-14 mpg between 60 and 80 mph. But the V8 makes 420 horsepower, to the diesel Jul 13, 2021 · viper8315. The 2WD truck has an EPA rating of 33 MPG on Aug 20, 2021 · Even in the rare foot-to-the-floor sprint, the diesel Suburban doesn't feel slow, recording an 8. The price of the 2022 Chevrolet Silverado 2500HD / 3500HD starts at $41,295 and goes up to $68,745 depending on the trim and options. #1 · Aug 19, 2021. 4 gallons of diesel fuel over the course of 204. 5-12 mpg in hilly country and occasionally saw 13 with a tail wind. Dec 14, 2023 · The Silverado 2500HD ZR2 comes standard with the gasoline L8T 6. 6L V6 Chevy offers, the fuel economy really can prove to be beneficial. The performance benefits and overall efficiency improvements make a… Mar 7, 2021 · We towed a 25 ft travel trailer with our 2020 Chevy Silverado 1500 Z71 Duramax--towed weight was 7000 lb, tongue weight 825 lb. 1mpg, and that's a lot of mixed driving. Those 15-25 mpg vehicles will be Nov 13, 2021 · 2099 km/1312 (since new and about 1 month) miles fuel indicated is at 9. 9 mpg per EVIC). 7L Cummins and a 6 speed 68RFE transmission with 3:73 gears and without the use of DEF is averaging 11 MPG towing a 13,000 pound 13'-6" 5er. I get 19 to 21 mpg now at 75 mph not towing. , roughly 600 lb cargo/people in the truck. The Silverado 1500 diesel is EPA-estimated at 23/33/27 mpg city/highway/combined for 4×2 models and 23/29/25 mpg for 4x4s. New 2021 Duramax AT4 6. 6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup Added Apr 2021 • 25 Fuel-ups. So far, so good. 4 L/100 km: EPA Ratings for 2020 Sierra 1500 Diesel 4WD (MPG) City Highway Combined; 22: 26: 24: Jun 17, 2022 · The Iconic 2011-2016 6. 3-liter V-8 (15/19 mpg city Dec 27, 2022 · 3. Regardless of how accurate this is, I recently got a check engine light and a prompt for there being a problem with my Jan 16, 2017 · 1700 Miles, have parked the Raptor while the refineries restart after Harvey. Similar to the F-150, the Duramax-powered Chevrolet Silverado 1500 turns out its best fuel efficiency numbers at lower highway speeds. 6 Duramax is equipped with 2WD and 4WD options. Before I re geared the truck was brutal once it got to 6th gear always jumping from 5th and 6th. We took our long-term 2023 Chevy Silverado 1500 3. 7 mph, pretty much matching the 22 mpg the EPA says the truck should achieve Jan 5, 2016 · The EPA rates the Canyon 4x4 at 20/29/23 mpg city/highway/combined, and we achieved 22/30/25 mpg during our Real MPG testing. Our 2500 The price of the 2020 Chevrolet Silverado 2500HD / 3500HD starts at $36,195 and goes up to $63,195 depending on the trim and options. 2015. To get the corresponding version of the Power Stroke, we will also take a look at the mileage of the 3. Search by make for fuel efficient new and used cars and trucks Jan 14, 2019 · Fuel Economy. 70 @ 115mph on #2, 677 HP, MPI Twins. I would think you should be getting around 15-20 even if you have a heavy foot. Aug 23, 2019 · With a larger circumference of the bigger tires the mileage figures will be significantly impacted. Search by Model. The powertrain was awesome and had no problem with the load. 1 hour ago; mhprogrammer added 1 notes for their 2003 Chevrolet Silverado 2500 HD. The Sierra Sep 7, 2023 · On the trip out there was a 25mph head/side wind but on the way home no wind. Have about 500 miles on it after the change, and so far does not appear that I am getting fuel in the crank case anymore, and can't see a leak externally. 2-3:t mm. 6. 8 MPG seems a LOT though. 2 Avg Apr 7, 2022 · Our 2021 Chevy 2500 crew cab Duramax gets about 12-14 around town. Work Truck. 5 mpg). After a little research I guess they r gonna need to be replaced soon. Towing mileage was about 10-20% lower than diesel. The 2020 Chevrolet Silverado with its optional 3. 4-second run to 60 mph. Drive in Economic/2WD Mode. Take that truck for a long drive maybe a hour or two and see how the numbers for 25 marker goes. With the 2023 Ford F-150 Hybrid, you get an EPA-estimated 25 mpg in the city, up to 26 mpg on the Fuel Economy of 2021 GMC Vehicles. Mar 12, 2017 · Even with wind alot of wind, we averaged 19. My computer claims my average mpg is usually between 20-22 mpg around the city (not many lights, very flat, and high speed limits). 4. May 2, 2012 · My LML is getting excellent fuel mileage. The 4500 gets around 9-13 town and hwy mix. 0 mpg combined, or 6 Aug 20, 2021 · Even in the rare foot-to-the-floor sprint, the diesel Suburban doesn't feel slow, recording an 8. Had 300k on it when it was totaled. Share. Ford’s Power Stroke engine, designed for hefty pickups like Duramax, presents another benchmark: Jan 9, 2020 · Related: 2020 Ram 1500 EcoDiesel MPG Report After 900 Miles. Aug 23, 2021 · The 4WD diesel gets an EPA-estimated 20 mpg in the city and 26 mpg on the highway, which is considerably higher than the 5. 8l Duramax. The Toyota Tundra Hybrid gets an EPA-estimated 19mpg in the city and up to 23 mpg on the highway. 3 mpg combined, Silverado Nov 20, 2011 · Nov 19, 2011. 1 hour ago; G17inSC fueled-up their 2005 Chevrolet Feb 6, 2021 · Typically the 31 mile varies between about 22 and 27 usmpg. What would you all do differently and The Edmunds TCO ® estimated monthly insurance payment for a 2023 Chevrolet Silverado 2500HD in Virginia is: View detailed gas mileage data for the 2023 Chevrolet Silverado 2500HD. My 2500HD. 25 mpg. #10 · Aug 20, 2017. Lifetime average is a little better than 24 usmpg / 9. I’m considering selling it and buying a Colorado/canyon with the little duramax in it but my mechanic friends have no experience with them. 2008 Chevrolet Silverado 2500 HD LTZ 6. 7l/100 kms, on the highwaythese trucks in my opinion do very well for the amount of weight and power in reserve they are carrying. 209k miles on it now. The rest of the time I get about 19 unloaded on the freeway running a steady 70, and 16. Chevrolet. 6 mpg and I'm having a dash controlled program installed soon. Duramax vs. PRICE. My new LML so far is at 18. #2 · Jul 27, 2006. Last Tank: 15. On the way home with no wind the current mpg was pretty steady around 18. I have 12000 miles on it now and overall I have averaged 15. That number beats the Ford F-150 diesel by 3 Sep 24, 2011 · I struggle to get over about 14/15 in town while babying the shit out of it. Jan 31, 2021 · 2021 Fuel Milage. The Duramax's relative paucity of horsepower—277 horsepower at 3750 rpm Following shows the average MPG of each of the 26 vehicles in the system. 3-liter V-8 (15/19 mpg city Aug 27, 2019 · Posts: 2,392. Feb 3, 2024 · Power and performance. highway. OWNER OPERATORS WHO HAVE USED IT REPORT FUEL SAVINGS OF 25 TO 30 PERCENT IN MPG AND AN INCREASE Oct 9, 2023 · The Evolution of Duramax Engines. The four-wheel drive 2020 Silverado Duramax got an estimated 23 mpg in the city, 29 mpg on the highway, and 25 mpg combined. Full EGR delete. 8 L/100km, at just under 4000km / 2500 miles travelled (hand calc for every fillup) Like others, I'm finding hand calc numbers show slightly better fuel economy than the truck calcs. 2020 Chevrolet Silverado 1500 Diesel Specifications. 15. 2 MPG 4 hours ago; DerekSimon fueled-up their 2024 Chevrolet Silverado 2500 HD. . by William Clavey 25 mpg / 9. 5 MPG Diesel Power Challenge 2008. 6-liter V-6 and six-speed auto 2. In the 4wd configuration, the EPA estimated MPG is 19 city and 28 highway. J. 2022 Chevrolet 2500HD LT Duramax Added Nov 2021 • 43 Fuel-ups. Get an accurate view of your vehicles fuel economy; May 31, 2023 · The big fuel eater besides wind resistant is speed. 5-18. GM classifies them as bad anything over 5. 38 minutes ago; Mkozierachi fueled-up their 2011 Chevrolet Silverado 2500 HD. Ford. 5 CCSB Silverado 3500 4X4. 5 MPG 49 minutes ago; mhprogrammer added 1 reminders for their 2003 Chevrolet Silverado 2500 HD. Aug 15, 2020 · Highway MPG Is Directly Linked to Highway Speed. 6-liter LML Duramax V-8 engine is the capstone of GM’s Pre-L5P turbodiesels. My normal driving with a mix of highway and country roads the mpg is around 15-16. 3, it has 220,xxxkm (136 Mi) I commute 150km (93 Mi) a day round trip and get 15L/100 (15. So far I am less than impressed with the fuel mileage. Nov 27, 2020 · 24,355 miles on my '18 ZR2 Duramax, lifetime average 25. 6 was noticeably more powerful and got better mileage. That's across the flats, over hills and across mountains. 3 mpg/9. Duramax. No increase in fuel mileage here. 71@141+MPH on #2 fuel only, MPI Twins. 0 MPG 5 hours ago; 2500Silvey added a 2024 Chevrolet Silverado 2500 HD to their garage. The 2024 Silverado Duramax acted as a tow rig for us this week, and actually ended up being quite enjoyable to rack up some miles on. My numbers are generally 1-1. 5 on my 10 mile country road and 6 stop light commute to work. The mileage towing a 25 foot travel trailer is averaging about 12. But it weighs 11k and has 4:30 rear. Most of the drives are short in-town trips but there are some highway driving, but when I look at instant MPG it only shows 15-16 Jul 27, 2017 · Turner_122. 5 hours ago; DanR1326 fueled-up their 2012 Chevrolet Silverado 2500 HD. Motor Ops autocal. A 4x4 with the V8 gets 17 mpg combined, while the diesel gets 25 mpg combined. Aug 7, 2018 · 55-60 MPH is going to return the best economy and may get you into the 24-25 MPG range but even on the 55 MPH 2 lane rural roads around here you would be a rolling roadblock at that speed with an average traffic speed of around 65 MPH. 5 gals/ 100 miles . 2 with about 25% of those miles loaded with a camper and atv trailer. 6-liter Duramax V8 engine on a highway/city test loop. Last Tank: 8. The most accurate 2006 GMC Sierra 2500 HDs MPG estimates based on real world results of 3. Keeping the fuel filter changed will help some. So, keep all your tire pressure at 35psi for better fuel mileage in your 6. Finally, likely the biggest benefit for the Chevy Colorado ZR2 over the Tacoma TRD Pro has to do with fuel economy. 5 mm and 5-8 were between 3. I recently upgraded from a very tired 02 LB7 Dmax to a 2021 CC DRW. 6l/100 km which converts to 24. it also boasts an 11-percent increase in fuel economy, and 397 hp and 765 lb-ft of torque Fuel Efficiency: The 2023 Chevy Silverado 1500 fitted with Duramax promises an EPA-estimated 23 mpg in the city and 33 mpg on highways. 8 MPG 5 hours ago Jun 23, 2019 · We'll be keeping a close eye on the sales charts, to be sure. Many owners report seeing 23-24 mpg with the cruise set at 80 mph, but 27 to 29-mpg when cruising at a more docile 65 to 70 mph. 5 mpg 80% highway with many stops and current trip about 300 miles @ 25. 5 MPG. Our last long-term Colorado, a nearly identically equipped 2015 Colorado Z71 4x4 with the older 3. Diesel is easier for me to find in Htown than gas and priced the same as regular so been enjoying that aspect as well. #1 · Apr 14, 2013. Feb 6, 2021 · Typically the 31 mile varies between about 22 and 27 usmpg. 0-liter turbo diesel I6 engine. 3 l/100. Jul 25, 2019 · Chevrolet releases the official fuel economy numbers for the all-new 3. Feb 14, 2024 · The Silverado Duramax diesel gets an EPA-estimated 23 mpg in the city, up to 29 mpg on the highway, and 26 mpg combined. Power has increased, and the truck idles and runs strong. My mixed around town/hwy (75/25 mix) driving mpg avg is 13. I was averaging around 80mpg. Verdict Jun 17, 2022 · The Iconic 2011-2016 6. 6 Duramax. Silverado 2500HD Vortec V-8 average fuel economy of 10. I think I’ll try 65 mph and see how the mileage is. Sep 23, 2017 · The fuel economy improvements were noticed on the road, too. We saw pretty similar n Mar 11, 2011 · 288 posts · Joined 2010. 0 mm. 0 GMC but the 6. My truck's (a 2022 2500HD) engine broke in at 15K miles. 25%) removed May 30, 2019 · My next trip will again be 650 miles, but this time with a 28’ enclosed V-nose trailer, loaded to 13,000+ lbs. 2024 GMC AT4 2500 4x4 Blacked Out. 0 $10k $20k $30k Jul 25, 2019 · Chevrolet. Been enjoying the 25-30 MPG, and no prob on soggy ground or standing water during storm. As such, a cold air intake upgrade will add up to 15 horsepower and 25 torque while also providing benefits like lower EGTs, faster turbo spool and throttle response, and even 1-2mpg increases in fuel economy. With the Ford F-150 Hybrid, you get an EPA-estimated 25 mpg in the city and up to 26 mpg on the highway. 21. See All 24 Photos. 4156 posts · Joined 2019. 0-liter Duramax turbo-diesel engine in the 2020 Silverado 1500 half-ton trucks. O and that was at idle, with no load on the engine. Nov 12, 2012 · With a MP-8 tuner on my 06 I average 26 mpg (canadian) or 10. 6 miles. Despite having no significant changes between the 2020 Chevy Silverado and 2021 model year, the Duramax diesel got a significant drop in its MPG ratings. #1. May 12, 2008 · Congrats on 3rd place!! I ended up 7th overall, but 3rd in the mileage test. 6 hours ago Jul 25, 2019 · Chevrolet releases the official fuel economy numbers for the all-new 3. 5 mpg increase. 5" Zone Level Kit, Moto Metal 970 wheels/Nitto Terra Grapler G2's, Custom Cab lights, LED Fogs, Resonator Mar 25, 2019 · I'm running a basically stock 2500HD with a L5P; fuel economy and towing muscle were important priorities when I bought this rig. 7 mpg hand calculated (19. I could tow my personal 26ft 5th wheel and get 8-9mpg. Although, there's also people bone stock that Search by Model. No towing and haven't taken it on any long trips, so these are all just back and forth to work and running around town trips. 6-liter Duramax turbo diesel features eight cylinders with a displacement of 403 cubic inches and comes equipped with a turbocharger for added Aug 19, 2021 · 1 post · Joined 2021. If 4WD is of Feb 6, 2024 · My 09 gmc duramax 4dr long box with a tuner and bigger exhaust gets 22-24 mpg at 60 mph 20-22 mpg at 70 unloaded and 18-20 mpg at 80 mph. I do not think that fuel mileage is that impressive for a new diesel truck, that use DEF. I am new to the forum but I have read many of your discussions. Point is mine shouldn't come anywhere close to yours. and on a trip i think i averaged maybe 19 at about 60 mph by gps. In running 37" with a 7. EPA MPG Highway MPG: 25. Spending hundreds of dollars to save money on fuel seems counter-productive to me. I currently have a 2011 Silverado with the 5. 2021 GMC Canyon 2WD 6 cyl, 3. That is the best and it is a rare outcome. 6 L, Automatic 8-spd Sep 8, 2019 · Superficially, the choice comes down to horsepower or fuel economy. 8 MPG off vs hand calc. Just replaced Fuel Injectors and my fuel economy has decreased by 25%. 0L Duramax losing mpg? I have a 2021 Sierra AT4 with the baby diesel in it and 26,000 miles. 5 to 9. As for capability, the Canyon is rated to tow up to 7,600 pounds or Nov 14, 2021 · The 25 miles marker, low mpg could be from the truck sitting at idle being moving alot when it was try to regen and keep getting stopped. 20+ MPG tire smoking monster! *SOLD* 2008 GMC Sierra 3500 SLT - Crew Cab Long Bed SRW. The 4" exhaust may help both power and mileage, but only if the turbo-back is used. While the Duramax diesel is a $3,500 upcharge over the stock 3. Nov 4, 2019 · A reviewer has tested the fuel economy of the 2020 GMC Sierra AT4 with the 6. My 2008, Mega Cab Dodge with the 6. Sep 18, 2019 · The Chevrolet Colorado Duramax averaged an impressive 33 mpg during the AJAC EcoRun event in Alberta, Canada, besting hybrid vehicles like the Ford Explorer. And 22 MPG in the city. My truck is currently getting an average of 11-12 MPG. 6 on one trip coming back from a California delivery. 0L Duramax diesel on a long towing trip. LT. Highway consumption for two-wheel drive models is rated at 33-mpg by the EPA, with 23-mpg listed in city driving. 6 L gas. Now. 6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup Added Mar 2021 • 341 Fuel-ups. Property of Boor35 . Most upgrades are for improved power and running cooler. #6 · Mar 14, 2011. 5 while towing. 7 MPG 46 minutes ago; Fusion_Systems fueled-up their 2024 Chevrolet Silverado 2500 HD. 5 but if I drive like grandma I can take that Jun 29, 2006 · 86 posts · Joined 2005. In the mountains I normally get between 8. 2006 GMC Crew cab Hd2500 Duramax, 167 kms -Sold_. A significant bump in fuel economy over the 5. When rolling empty on the highway I have gotten 25-30!! Mind you that is running 65 mph or so and just being gentle on the right foot. 2015 GMC Double cab Hd2500 Duramax bought mid feb/'16 :gearjamin. The best mileage I have ever gotten with any of my Duramax diesels was around 25 MPG on a roughly 100 mile run Apr 23, 2020 · 2020 GMC Sierra 1500 Duramax Real-World Fuel Economy Test 27. Custom. We averaged 11. DuramaxDanZ71Sport. 0 $10k $20k $30k Jul 15, 2008 · Black / Gray, LLY Duramax, EFI LIVE, Kennedy 4 into 5" exhaust, 6k HID's. 6-liter V8 engine that produces 400 horsepower and 460 lb-ft of torque. The story of Duramax engines begins in 2001 when the first generation, known as the LB7, was introduced with the first sacless VCO nozzles in the USA north american regen. According to Chevrolet, the 6. Hand calculating all of my mileage through Fuelly. Apr 14, 2013 · 6 posts · Joined 2013. On the highway, its value is 33 MPG, and 23 MPG in the city. 80 per gallon of diesel. 43 per gallon of gasoline and $3. Feb 1, 2024 · A new report claims GM is developing a new 8. 1 hour ago; SwanTy fueled-up their 2005 Chevrolet Silverado 2500 HD. We are looking to get close to 25 mpg highway out of it. Search by make for fuel efficient new and used cars and trucks Chevy 2500. 8 MPG 5 hours ago; usavyadams added 1 notes for their 2020 Chevrolet Silverado 2500 HD. If any owners have some real world experience The most accurate 2008 GMC Sierra 2500 HDs MPG estimates based on real world results of 2. Typically I get under 10 mpg when towing. Read the results right here. That’s good for an average combined fuel economy result of 32. 0 MPG 30 minutes ago; 2500Silvey added a 2024 Chevrolet Silverado 2500 HD to their garage. We had the opportunity to test this gasoline V8 in the 2500 HD Z71 and found it to be more than adequate, however, the true fun of a full-sized truck lies with the more powerful diesel engine options. 07 ccsb 4wd with a built engine and trans. Truck needs a good warm up and some cruising with out a trailer to see if the low mpg gets higher. 2-4. Last Tank: 26. it also boasts an 11-percent increase in fuel economy, and 397 hp and 765 lb-ft of torque Last Tank: 20. Jan 31, 2022 · Something wrong and no, after break in you might see 1-1. Oct 29, 2021 · More importantly, the Silverado's Duramax engine balances its strength as a tow option with phenomenal fuel mileage that won't be duplicated by anything other than a diesel. The Duramax's relative paucity of horsepower—277 horsepower at 3750 rpm 2022 Chevrolet 2500HD LT Duramax Added Nov 2021 • 43 Fuel-ups. I was pretty happy. Property of Yotaking98 . 2016 Chevy 2500Hd, PPEI tuned, CAT back exhaust, 2. I was watching the fuel economy screen showing last 50 miles, and it was always somewhere between about 17. ^x2 I checked my flow rates last month, inj 1-4 were between 4. 0-liter turbodiesel Duramax inline-six engine is rated at up to 33 mpg highway by the EPA. ~the Captain. Hwy only gets up to maybe 14-15. 2002 LB7 Max'd Out 9. Hauling 15k lbs of hay bumper pull i averaged 10-12 mpg doing 60-70 mph. May 25, 2023 · My gas Chevy got about the same mileage empty as the Duramax trucks I've owned. 4 and 5 levels didn't give better mileage. ON SALE. 2009 Silverado 2500HD CCSB LTZ Diesel. 2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles May 18, 2022 · 4400 miles on my 2023 High Country 4x4 LZO Duramax. 2024 GMC Denali 2500 Crew Cab, standard bed, White Frost, leather, 6. My diesels got 10. I really liked my 6. Dec 4, 2019 · The 2020 GMC Sierra 1500 crew cab we tested consumed 6. 3 million miles driven in 114 GMC Sierra 2500 HDs Duramax 2500HD. 1 MPG 1 hour ago; dannk added 1 notes for their 2004 Chevrolet Silverado 2500 HD. The truck has 285s, a airdog, torsion bars bottomed out and 3" drop shackles in the rear. That includes 1700 miles of towing a car on a flatbed. Also, you definitely can't trust the DIC fuel mileage numbers after you install it. Dec 11, 2020 · With 277 hp and 460 lb-ft of torque, the Duramax turbodiesel l-6 engine is buttery smooth and elegantly refined. LTZ. When the 32' fifth wheel is connected the best I get is 10 mpg. Only one DEF fill up as of yet. $46,000/$54,500 (base/as tested, est Jan 29, 2024 · A quick reset of one of the two trip computers and the next 162 miles registered at 22. com shows 25 mpg average. 3's 15 mpg in the city and 20 mpg on the highway. Jul 22, 2022 · The factory intake on the Duramax LLY is really restrictive. 2 mpg at an average speed of 72. Great highway power, good for moderate towing around ranch. No fuel fills noted as my last fill was probably low because of an air lock, the pump filled very quickly. Oct 19, 2020 · The 2021 Chevy Silverado 1500 Duramax diesel is worse on fuel. 5. This engine set the foundation for future models and quickly gained a reputation for its power and durability. My 02 pulling the same trailer and load averaged 11-14, empty it would do around 17-18. 2003 Chevrolet Silverado 2500 HD LT 6. 3L Duramax turbodiesel engine for its truck models. On the hey I avg 18-19 mpg tuned and TCM tune. 2. On the 650 mile trip home, it will be empty at about 6,300 lbs. js qy cb rz kk uy lb nz xn rb