2020+ GM T1 Platform Powertrain | Chevy and GMC Duramax Diesel Forum

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truck shaking at idle

2

27

1K

Bad Fuel Economy

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21

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Installing a drain plug for the DEF tank in the 2021 Silverado 2500 L5P

5 6 7

137

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2020 2500HD Z71 Fuel Filter Change

2

21

7K

by smeezy

2020 GMC 2500HD Torque Converter Issues

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1K

by brahms

DEF consumption y'all are experiencing

2 3

45

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Low Coolant Warning

3

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by sambor

What EGT to monitor on iDash

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353

2020 Duramax thumping sound

48 49 50

990

109K

DEF Fluid check engine light

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352

by Melonhead1102

10sp Allison drive mode and Low mode

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711

by Hoser

After first oil change... Video inside.

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Sensor cleaning

2

26

5K

by Jsapie

Amsoil Filter Bypass

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441

by Old guys rule

P2C48 code on 2020 Sierra 2500hd

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Trans doesn't use 1st gear?

6

603

by TJEli

Transmission Hunting - Dealer Can't Communicate with Truck

16

719

Is It Posable To Have The Wrong 10 Speed Transmission I.e. Lite Duty in a Heavy Duty Truck

2

36

2K

by Melonhead1102

2

32

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by smeezy

Dead Battery Warning - Parking Brake Won't Release

9

4K

10L1000 Servicing

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Check Your Air Filters!

12

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2020 Chevy 2500 Duramax Transmission Failure

2

31

14K

20+ front diff fluid has new spec??

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by jc21

Difference between 19 and 20 DPF back exhausts

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423

by TJEli

Check engine light already

2

27

9K

Service Parking Brake DIC Message

4

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Issues and Recalls

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20

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Conventional Oil or Synthetic in the 2021 L5P?

2

25

7K

85 miles on truck and 3 codes thrown

10

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by Joetheroofer1984

Dead Batteries + Jump Start = CODES galore!

17

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Pulsar V3 on 2021 all smiles :)

8

2K

High mileage 2020+ HDs

8

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2018 6.6 codes P0305 and P0205 reduced power

2 3

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3K

Anyone running one of these?

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