Help Us Get to 1,000!

3

2

7

Trucks Submitted

Don't Miss Out on Our Gen-Y Hitch GIVEAWAY!

3.0L LM2 Duramax Service Schedule

Maintenance Guide & Service Schedule for GM's LM2 Duramax

Maintenance Intervals For the 3.0L LM2 Duramax Diesel Found in 2020 Silverado 1500 and Sierra 1500 trucks

3.0L Duramax Service Schedule
2020 Chevrolet Silverado Diesel – Photo Courtesy of Chevrolet Media

Maintenance plays a crucial role in improving the longevity of any diesel truck. The 3.0L LM2 Duramax hasn’t been out long enough to truly test their dependability, but even the least reliable diesels manufactured become much more reliable when their owners obey a strict service service schedule. Take the 6.0L Powerstroke or the 6.4L Powerstroke for example. These diesel trucks are notorious for problems. With strict maintenance however, they can be really great trucks! So what’s the bottom line? Basically, If you take care of your diesel and maintain a strict service schedule, you can reduce problems down the road. Everything you need is right below in our 3.0L LM2 Duramax diesel service schedule guide.

With the 3.0L LM2 Duramax diesel service schedule below, you will know when different maintenance tasks need to be completed. If you’re going to be maintaining your 3.0L Duramax by yourself, take a look at our fluid capacities and specifications guide. It’ll give you details about how much of each fluid or oil you need for your 3.0L Duramax. We also have links to all the 3.0L Duramax maintenance parts on this page.

3.0L Duramax Service Schedule

Everything found in the chart below is based off of GM’s recommended maintenance schedule. Depending on your driving habits, you may need to abide by the severe maintenance schedule. GM recommends abiding by the severe schedule if you tow, idle, or drive in heavy traffic often.

Normal Operating Conditions

Maintenance/ServiceMilesKilometers
Change Oil7,500 miles12,000 km
Change Oil
Filter
7,500 miles12,000 km
Change Fuel
Filter
30,000 miles48,000 km
Replace Air
Filter
45,000 miles72,000 km
Change Cabin Air Filter45,000 miles72,000 km
Flush Cooling
System
150,000 miles240,000 km
Replace Brake FluidEvery 5 yearsEvery 5 years
Replace Transmission
Fluid
45,000 miles72,000 km
Change
transmission filter
45,000 miles72,000 km
Replace Transfer
Case Fluid
97,500 miles108,000 km
Replace Oil Pump Belt150,000 miles240,000 km

Severe Service Schedule

Maintenance/ServiceMilesKilometers
Change Oil7,500 miles12,000 km
Change Oil
Filter
7,500 miles12,000 km
Change Fuel
Filter
30,000 miles48,000 km
Replace Air
Filter
45,000 miles72,000 km
Change Cabin Air Filter22,500 miles36,000 km
Flush Cooling
System
150,000 miles240,000 km
Replace Transmission
Fluid
45,000 miles72,000 km
Change
transmission filter
45,000 miles72,000 km
Replace Transfer
Case Fluid
45,000 miles72,000 km
Replace Oil Pump Belt150,000 miles240,000 km

3.0L LM2 Duramax Maintenance Parts & Fluids

Part TypePart #Amazon Link
Engine Oil0W-20DexosD
Engine Oil FilterPF66ACDelco PF66
Fuel FilterTP1015
23304096
ACDelco TP1015
Cabin Air FilterCF 185ACDelco CF 185
Engine Air FilterA3244CACDelco A3244C
CoolantDex-Cool
12346290
50/50 Mix
Dex-Cool 12346290
Transmission FluidDexron ULVDexron ULV
Transmission
Filter
unknownunknown
Transmission pan
gasket
unknownunknown
Transfer Case FluidDexron VI1 qt – Dexron VI
1 Gal – Dexron VI
Differential Fluidunknownunknown
Diesel Exhaust FluidN/APeak BlueDEF

Want More Information on the 3.0L LM2 Duramax?

Visit one of our other posts featuring these trucks!

DISCLAIMER: This website page contains affiliate links, which means that if you click on one of the product links and purchase the product, I’ll receive a small commission. This helps support Diesel Resource and allows us to continue to produce helpful diesel insight and content. Thank you for the support!

We Live & Breath Diesel.

Want to learn more about the latest insights in the diesel industry? Signup for our newsletter and stay up to date on the top trending topics!

ABOUT Kamil

Founder of Diesel Resource and a complete diesel head. Has a little bit of problem buying too many trucks. Learn more about him by checking out his truck.