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GMC AT4 HD Problems and Issues

GMC Sierra 2500/3500 AT4 Problems and Issues
R
Gas fill flapper O ring
Replies
1
Views
984
Duramaximus
Duramaximus
GMCRocque
2022 HD 3500 Issues
Replies
7
Views
4K
GMCRocque
GMCRocque
A
2021 AT4 PAINT PROBLEMS
Replies
8
Views
3K
Duramaximus
Duramaximus
K
Running Board Issues (2022 Sierra 2500 AT4)
Replies
2
Views
3K
rduarte
rduarte
G
Transmission has hard jolt in initial acceleration
Replies
11
Views
4K
Grouper
G
B
Power steering pump noise
Replies
2
Views
3K
BigBlueAT4
B
J
Help! DEF system issue
Replies
0
Views
2K
JCameli
J
C
Squeak/Rattle/Rub noise in rear while in drive
Replies
0
Views
1K
cmont1065
C
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Latest Poll

Has your AT4 3.0 needed unscheduled repairs?

  • Sure has, shop knows me well.

    Votes: 18 23.7%

  • Nope, trouble free!

    Votes: 58 76.3%
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