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'99 - '06 GM Truck Modifications
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Tech Discussion
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Discussion on anything technical or mechanical that doesn't fit in other tech categories.
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2004 Tahoe warm front driver and passenger but still cool in back
ludwigtattoo
Thursday at 1:15 PM
Replies
9
Views
98
Yesterday at 5:51 PM
stutaeng
F
AC recharge?
FarmerTed
Aug 27, 2026
Replies
5
Views
182
Aug 28, 2026
FarmerTed
F
S
GMT800 Cab Swap: 2002 → 2003 1500 Ext Cab, Rust Control & Questions
SilveradoPhil
Aug 1, 2026
Replies
10
Views
476
Aug 17, 2026
Turbo4whl
Added trans temp to cluster and replaced bulbs with LEDs
Tonimus
Jul 14, 2026
2
Replies
28
Views
994
Aug 7, 2026
FW_Z71Burb
Y
GMT800 diagnostic and control app
YukonDenali03
Jul 29, 2026
Replies
8
Views
421
Jul 31, 2026
YukonDenali03
Y
J
Does any one know why coolant would be leaking down low beside a/c compressor on 2004 6.0
JRC
Jul 15, 2026
Replies
9
Views
268
Jul 28, 2026
AuroraGirl
NOT SO Faint fuel smell
FW_Z71Burb
May 28, 2026
Replies
9
Views
540
Jul 18, 2026
ORVietVet
F
Wrong OEM fuel pump?
Fluffy83
Jul 1, 2026
Replies
4
Views
208
Jul 1, 2026
ORVietVet
Lift Vibration Issues
symplman
Jun 17, 2026
Replies
9
Views
215
Jun 25, 2026
JorgeS
Key Locks
Turbo4whl
Jun 9, 2026
Replies
7
Views
418
Jun 15, 2026
tmpass
T
Modify tune for tire size, gear ratios, DTCs, etc...
Tonimus
Jun 12, 2026
Replies
3
Views
415
Jun 13, 2026
CPB
T
EVAP P0446
TomO
Jun 3, 2026
2
Replies
24
Views
1K
Jun 12, 2026
Tonimus
I
2001 Tahoe high presure on low side of A/C
idatahoe
Jun 1, 2026
Replies
6
Views
368
Jun 5, 2026
CPB
C
Undercarriage Input
ChunkyTuna
May 19, 2026
Replies
10
Views
686
May 22, 2026
AuroraGirl
L
Truck wants to start on the first ignition turn 5.3
Lukas washburn
May 14, 2026
Replies
4
Views
340
May 18, 2026
tmpass
T
Keep driving your GMT800s?
stutaeng
Jun 26, 2025
3
4
5
Replies
82
Views
7K
May 11, 2026
Marky Dissod
M
Features deleted by GM (gmt800 life cycle)
AuroraGirl
May 30, 2025
2
3
4
Replies
75
Views
8K
May 10, 2026
AuroraGirl
ABS/Brake light "Service Brake System" message on cluster & C0245 when truck reaches 35-40 mph
Moto826
Mar 31, 2026
Replies
6
Views
1K
Apr 30, 2026
AuroraGirl
Changed the Serpentine belt and pulleys.
__roger__
Apr 14, 2026
Replies
10
Views
722
Apr 21, 2026
__roger__
C
Je ne sais plus ou demander
cathy gm sierra 2006
Mar 30, 2026
Replies
3
Views
218
Mar 30, 2026
ORVietVet
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Yesterday at 11:34 PM
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