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GMC 1500 AT4 Problems and Issues

Here is the place to discuss any problems or issues with the GMC Sierra 1500 AT4
D
Upper grille piece flew off on highway
Replies
3
Views
60
gemarsh
gemarsh
B
Hot! Won’t Detect New Brake Pads/Pad Monitor
Replies
11
Views
146
Bucky7711
B
G
2022 Sierra AT4 braking system warnings
Replies
3
Views
29
R467X
R
P
Hot! 2024 Issue with Windshield Washer
Replies
5
Views
89
john151ama
john151ama
Haole
Oh Bambi
Replies
10
Views
380
Haole
Haole
o2bnavw2
Chrome Grille Detach Recall - N24290120
Replies
1
Views
270
daven8844x
D
B
Tailgate Cameras Do Not Work
Replies
12
Views
2K
markuscis
M
T
Software Update Issues GM N25-250380 released May 12, 2026
Replies
7
Views
461
Tanner Peacock
T
S
Main ground strap locations besides passenger block to body and body to frame behind fender liner?
Replies
0
Views
75
scgt1
S
Bayoucountrygal
Android auto and apple car play not working
Replies
0
Views
45
Bayoucountrygal
Bayoucountrygal
AT4PAUL
Hot! AFM delete
Replies
5
Views
135
Pingbling23
Pingbling23
B
engine replaced under L87 recall December 2025, now water pump failed - covered under any warranty?
Replies
1
Views
61
R467X
R
Tchebe
Engine replacement experience
2 3
Replies
32
Views
3K
Denalibq
Denalibq
M
Check engine code
Replies
6
Views
226
RebelDS
RebelDS
ATXAT4
Threw code P2138 Today
Replies
2
Views
108
ATXAT4
ATXAT4
C
Squeak coming from front end
2 3
Replies
38
Views
7K
R467X
R
R
OEM Tonneau Cover Latches
Replies
1
Views
69
gemarsh
gemarsh
S
Truck won’t go into reverse, high RPM while driving, and “Decreased Speed” warning — anyone experienced this?
Replies
9
Views
727
pinebaron
pinebaron
zealoussalty_w
Engine is toast (2025 sierra 1500 at4 3.0L)
2
Replies
23
Views
1K
SierraTRK
SierraTRK
A
Very hard downshifting
Replies
5
Views
682
muddernuker
M
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