3.0L Duramax Diesel in the Tahoe, Suburban and Silverado 1500: Towing, MPG, Which Trims Get It
3.0L Duramax Diesel · Tahoe, Suburban, Silverado 1500 · Okarche, OKThe 3.0L Duramax diesel in the Tahoe, Suburban and Silverado 1500: towing, mpg, and which trims get it
Quick answer The 3.0L Duramax (RPO LZ0) is an inline-six turbo-diesel making 305 hp and 495 lb-ft, available on the 2026 Tahoe and Suburban in LT, RST, Z71, Premier and High Country, and on the Silverado 1500 from Custom Trail Boss up (standard on ZR2). In the Tahoe it is EPA-rated up to 26 mpg highway against 20 for the V8s and tows 8,200 lb 2WD / 7,900 lb 4WD; in the Silverado 1500 it tows up to 13,300 lb with the Max Trailering Package. It is not the top tow rating in the Tahoe (the 5.3L with Max Trailering is 8,400 lb) but it is the engine that pulls that weight on roughly 30 percent less fuel. Carter has diesel Tahoes on the lot, charges no doc fee, and delivers anywhere in Oklahoma.
What the 3.0L Duramax is
GM’s light-duty diesel is a 3.0-liter inline six with a variable-geometry turbo, an aluminum block, and a 10-speed automatic behind it. The version in every 2026 Tahoe, Suburban and Silverado 1500 is the updated LZ0, which arrived for 2023 with more power than the original LM2 and carries over unchanged for 2026 and 2027. Peak torque arrives at 2,750 rpm, which is why a diesel Tahoe feels stronger pulling away from a stoplight with a trailer behind it than the 6.2L does, even though the 6.2L has 115 more horsepower. The engine includes a 220-amp alternator and an engine block heater on every truck and SUV it goes in, and runs B20 biodiesel.
It is a different animal from the Duramax in our heavy-duty trucks. The 2026 Silverado HD uses a 6.6L V8 Duramax (470 hp, 975 lb-ft), and the 2027 HD gets an all-new 8.3L V8 at 555 hp and 1,230 lb-ft. The 3.0L is the one for people who want diesel economy and torque in something that still fits in a garage.
Three engines, side by side
| 5.3L V8 (L84) | 6.2L V8 (L87) | 3.0L Duramax (LZ0) | |
|---|---|---|---|
| Output | 355 hp / 383 lb-ft | 420 hp / 460 lb-ft | 305 hp / 495 lb-ft |
| Transmission | 10-speed automatic | 10-speed automatic | 10-speed automatic |
| Tahoe EPA mpg, 2WD / 4WD | 15/20/17 · 15/19/17 | 15/20/17 · 14/18/16 | 22/26/24 · 20/24/22 |
| Suburban EPA mpg, 2WD / 4WD | 15/20/17 · 14/19/16 | 15/19/16 · 14/18/16 | 21/26/23 · 20/24/22 |
| Tahoe max tow, 2WD / 4WD | 7,900 / 7,700 lb (8,400 / 8,200 with NHT) | 7,700 / 7,600 lb (8,200 / 8,100 with NHT) | 8,200 / 7,900 lb (8,200 / 8,000 with NHT) |
| Suburban max tow, 2WD / 4WD | 7,700 / 7,500 lb (8,200 / 8,000 with NHT) | 7,500 / 7,300 lb (8,000 / 7,800 with NHT) | 8,100 / 7,800 lb (8,100 / 7,800 with NHT) |
| Tahoe / Suburban trims | LS, LT, RST, Z71, Premier | RST, Z71, Premier, High Country | LT, RST, Z71, Premier, High Country |
| Fuel | Regular unleaded | Premium recommended | Diesel + DEF |
Tow ratings are GM’s maximums for a standard-equipped vehicle with driver, from the August 2026 Tahoe and Suburban order guides; options, passengers and cargo come off the number. EPA figures are 2026 model-year estimates. NHT is the Max Trailering Package. Engine-by-trim availability is simplified; several combinations carry package requirements, covered below.
Two things the table makes plain. First, the diesel is the fuel-economy story, not the towing story, in the full-size SUVs: it tows within 200 lb of the best V8 configuration and beats both V8s by 6 to 7 mpg combined. Second, the diesel’s tow rating does not move with the Max Trailering Package the way the V8s’ do. If you want the diesel, you are buying NHT for what the package contains, the integrated trailer brake controller, the Advanced Trailering Package cameras and app, the extra-capacity cooling and, on 4WD, the two-speed transfer case with hill descent control, not for the rating.
Where the Duramax is actually orderable
Tahoe and Suburban
LT, RST, Z71, Premier, High Country. Not LS. LT/RST/Z71 need the Sun and Tow Package, or Comfort Package + Max Trailering + sunroof + second-row buckets. Premier needs Technology and Entertainment + Max Trailering + Enhanced Trailer View, or Sun and Tow. Premier and High Country diesels cannot have Super Cruise. High Country is not offered with the second-row 60/40 bench on the diesel.
Silverado 1500
Custom Trail Boss, LT, RST, LT Trail Boss, LTZ, High Country; standard on ZR2 (the 6.2L is the ZR2 option). Not on Work Truck or Custom. Crew Cab standard bed and Double Cab need bucket seats with the diesel on most trims.
What it always includes
220-amp alternator, engine block heater, 10-speed automatic. On the Silverado 1500 the diesel runs a 3.23 axle as standard; the Max Trailering Package moves it to 3.73, and with 20-inch wheels that is where the 13,000-plus ratings come from.
Silverado 1500 Duramax: towing and payload by cab
The diesel pickup is where the big numbers live. These are the Crew Cab figures Oklahoma buyers ask about most, from the August 2026 Silverado 1500 order guide; the 1500 towing page has every cab and bed.
| Configuration | Diesel, standard axle | Diesel + NHT (20" wheels) | Diesel + NHT (18" wheels) | Base payload, diesel |
|---|---|---|---|---|
| Crew Cab short bed 2WD (CC10543) | 9,300 lb | 13,200 lb | 12,100 lb | 1,910 lb |
| Crew Cab short bed 4WD (CK10543) | 9,000 lb | 13,000 lb | 11,800 lb | 1,870 lb |
| Crew Cab standard bed 2WD (CC10743) | 9,200 lb | 13,100 lb | 12,000 lb | 1,840 lb |
| Crew Cab standard bed 4WD (CK10743) | 9,000 lb | 12,900 lb | 11,800 lb | 1,810 lb |
| Double Cab 2WD (CC10753) | 9,300 lb | 13,300 lb | – | – |
| ZR2 (diesel standard) | 8,700 lb | – | – | 1,550 lb |
For scale, the 5.3L V8 with Max Trailering reaches 13,200 lb on the same 4WD crew cab, so in the pickup the diesel and the 5.3L are a wash on rating; the diesel wins on torque at low rpm, on fuel economy pulling, and on range. The 1500 Duramax worth-it page works through the cost side.
Who should buy the diesel, and who shouldn’t
Buy the Duramax if
You put 20,000-plus miles a year on it, much of it highway. You pull a camper, a two-horse or a bass boat most weekends and want it to feel like nothing is back there. You run I-40 or I-35 to Dallas, Amarillo or Wichita regularly and want 600-mile tanks. You keep vehicles eight or ten years and care about resale, where diesel Tahoes and Suburbans have held up well.
Buy the 5.3L if
Most trips are under 15 minutes, which is hard on any diesel’s emissions system. You want the lowest purchase price and the simplest maintenance: no DEF, no diesel particulate filter, and oil changes at any quick-lube. You tow a few times a year. Or you simply want an LS, which the diesel is not offered on.
Buy the 6.2L if
You want the quickest Tahoe or Silverado, the sound, and the 420 hp, and fuel economy is not the deciding factor. It requires RST or higher on the SUVs and is the ZR2’s optional engine.
Diesel fuel in Oklahoma prices differently from gasoline month to month, and that moves the payback math. We would rather run your actual miles, your actual trailer and this week’s fuel prices through the numbers with you than quote a rule of thumb; call 405-546-1147 or stop in.
Duramax Tahoes at Carter right now
As of November 5, 2026 we have two 2026 diesel Tahoes on the lot, both 4WD: an LT (stock 30350) and an RST (stock 30380), both priced under MSRP. The Tahoe specials page has the current numbers and every Tahoe in stock, and the Suburban and Silverado 1500 specials pages cover the rest. If the diesel you want is not on the lot, we locate it from GM’s dealer network or place a factory order; either way the price we quote is the price, with no doc fee and no addendum, and we deliver anywhere in Oklahoma.
Frequently asked questions
How much horsepower and torque does the 3.0L Duramax have?
305 hp at 3,750 rpm and 495 lb-ft of torque at 2,750 rpm, per GM’s 2026 order guides. It is an inline six-cylinder turbo-diesel (RPO LZ0) paired with the 10-speed automatic in the Tahoe, Suburban and Silverado 1500. For comparison, the 5.3L V8 makes 355 hp and 383 lb-ft and the 6.2L V8 makes 420 hp and 460 lb-ft.
Which 2026 Tahoe and Suburban trims can get the Duramax diesel?
LT, RST, Z71, Premier and High Country. It is not offered on the LS. On LT, RST and Z71 it requires either the Sun and Tow Package or a combination of the Comfort Package, Max Trailering Package, sunroof and second-row buckets; on Premier it requires the Technology and Entertainment Package with Max Trailering and Enhanced Trailer View, or Sun and Tow. Premier and High Country diesels cannot be ordered with Super Cruise, and 2WD High Country diesels have further package limits. We spec it from the order guide so there are no surprises at delivery.
Which Silverado 1500 trims offer the 3.0L Duramax?
Custom Trail Boss, LT, RST, LT Trail Boss, LTZ and High Country, and it is the standard engine on the ZR2. It is not available on Work Truck or Custom. Crew Cab standard-bed and Double Cab trucks need bucket seats with the diesel on most trims. The Silverado 1500 Duramax page goes deeper on the truck specifically.
How much can a Duramax Tahoe tow?
8,200 lb on a 2WD and 7,900 lb on a 4WD (8,000 lb with the Max Trailering Package), per the 2026 Tahoe order guide. The Suburban diesel is 8,100 lb 2WD and 7,800 lb 4WD. The 5.3L V8 with Max Trailering is the highest-rated Tahoe at 8,400 lb; the diesel is within a few hundred pounds of it and does the job with far more torque and better fuel economy.
What is the fuel economy of the Duramax Tahoe and Suburban?
EPA estimates for 2026: Tahoe diesel 22 city / 26 highway / 24 combined in 2WD and 20 / 24 / 22 in 4WD; Suburban diesel 21 / 26 / 23 in 2WD and 20 / 24 / 22 in 4WD. The 5.3L V8 is 15 / 20 / 17 (2WD) and the 6.2L is 15 / 20 / 17 (2WD) and 14 / 18 / 16 (4WD). That is roughly a 40 percent improvement in combined mpg for the diesel.
Is the Duramax worth it over the 5.3L V8?
If you drive a lot of highway miles, tow a camper or stock trailer regularly, or keep vehicles a long time, usually yes: the combined mpg gain is large, the torque makes towing effortless, and diesel Tahoes hold value well. If most of your driving is short trips around town, the V8 is cheaper to buy, cheaper to service, and never needs DEF. Diesel fuel also prices differently from gasoline in Oklahoma month to month, which changes the payback math. We will run both numbers on the same trim for you.
Does the 2027 Tahoe and Suburban still offer the diesel?
Yes. The 3.0L Duramax continues on the 2027 Tahoe and Suburban at 305 hp and 495 lb-ft alongside the 5.3L and 6.2L V8s. Our 2027 Tahoe and Suburban page covers what else changed. The heavy-duty trucks get a different, much larger engine for 2027: the new 8.3L Duramax V8 at 555 hp and 1,230 lb-ft.
Do you have Duramax Tahoes in stock in Oklahoma?
Usually, and we can get more. As of November 5, 2026 we have two 2026 diesel Tahoes on the lot, an LT and an RST, both 4WD, and we can locate or order a diesel Suburban or Silverado 1500 in the configuration you want. Free delivery anywhere in Oklahoma.
Related
All three Duramax engines compared · Duramax Tahoe range on a tank · 2026 Tahoe buying guide · Suburban near OKC · Silverado 1500 Duramax: worth it? · 1500 towing capacity · 1500 fuel economy · Tahoe vs. Expedition vs. Yukon · 2027 Tahoe and Suburban · 2027 HD and the 8.3L Duramax
Horsepower, torque, trim availability, package requirements and tow ratings are from General Motors’ 2026 Tahoe, Suburban and Silverado 1500 order guides (published August 2026) and are subject to change. Fuel economy figures are EPA estimates for 2026 models; your mileage will vary. Inventory and GM incentives referenced are as of November 5, 2026. Carter Chevrolet charges no documentation fee and no dealer addendum.
Want to drive a Duramax Tahoe?
Both of ours are ready to go. Bring the trailer if you want to feel the difference, or tell us the configuration you want and we will find it.