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GMC 1500 AT4 3.0L Duramax Turbo Diesel engine

Discussions specific to the GMC AT4 3.0L Duramax Turbo Diesel engine
chaseydog
Interesting read on GM's unreleased 4.5L LMK Duramax V-8
Replies
0
Views
1K
chaseydog
chaseydog
JimP
DEF usage?
Replies
3
Views
883
gemarsh
gemarsh
S
DFS failure 10 minutes after leaving dealership
Replies
5
Views
1K
jerm1777
jerm1777
V
2021 GMC sierra 1500 AT4 3L Turbo Diesel- Vibration and Rythmatic humming noise - On High Speed
Replies
1
Views
943
gemarsh
gemarsh
F
Oil change time ?
2
Replies
20
Views
4K
cjblake09
C
S
Edge ezx
Replies
5
Views
2K
pinebaron
pinebaron
I
Baby Max Teardown
Replies
0
Views
1K
ironworker40
I
Cocoabean
Contaminated Diesel Fuel
2
Replies
21
Views
6K
Teegunn
T
Coondog
Air Filter Change
Replies
7
Views
8K
pinebaron
pinebaron
25at4gray
My first fuel up
Replies
0
Views
1K
25at4gray
25at4gray
J
LZ0 Question
Replies
13
Views
9K
BigLaker
B
C
#2 Injector issues
Replies
0
Views
823
cjblake09
C
MontyMoose
First Time Owning a Diesel
2
Replies
16
Views
19K
Teegunn
T
D
Anyone Here Running a ScanGauge?
Replies
0
Views
727
dragon
D
A
Cylinder 5 Glow Plug DTC Code 2021 AT4 3.0
Replies
1
Views
1K
gemarsh
gemarsh
TX_Critter
PPE Catch Can Kit Back in Stock
Replies
2
Views
1K
TX_Critter
TX_Critter
H
Modified Stock Air Box
Replies
5
Views
4K
ptc85
ptc85
M
Limp Mode
Replies
13
Views
10K
bobholthaus
bobholthaus
J
PCV vent question
Replies
5
Views
982
Jpgonz
J
L
Volume Increase
2
Replies
24
Views
5K
Teegunn
T
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