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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
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PO442
Today at 8:19 AM
Mooseman
Drivetrain
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Crimping new trans cooler lines
Today at 4:40 PM
Mooseman
Vortec 5.3L V8
New
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5.2K
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394
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Runs rough couple miles after starting
May 10, 2024
04envoyxlv8
LS2 6.0L V8
40
839
Threads
40
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839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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High Revving After Spinning Tires
DenaliHD66
Feb 6, 2014
Replies
15
Views
2K
Feb 19, 2014
NJTB
N
M
help me identify this piece!!!
mrjean
Sep 24, 2013
Replies
15
Views
1K
Oct 17, 2013
bruhaba
B
K
Which LSD?
kmanz1
Mar 10, 2013
Replies
15
Views
2K
Apr 23, 2013
Metsämies
Q
2003 4.2L Hemorrhaging Oil in Cold Temps
Quadzilla724
Feb 8, 2014
Replies
15
Views
2K
Feb 28, 2014
IllogicTC
S
How hard can a 5.3 engine install be on gmt360
Sprung Monkey
Jun 5, 2021
Replies
15
Views
2K
Jul 20, 2022
Reprise
Does anyone have a spare PCM I can borrow until I get mine tuned? :D
Trail_This
Nov 12, 2012
Replies
15
Views
1K
Nov 16, 2012
Trail_This
NEED HELP
Recommended Exhaust Manifold Replacement?
MrShelley
Oct 14, 2021
Replies
15
Views
2K
Jan 30, 2022
Schurkey
Started my 4L60e shift kit install
Reprise
Jul 16, 2016
Replies
15
Views
1K
Aug 12, 2016
Mooseman
NEED HELP
DEXRON VI Mixed with Nasty Old DEXRON III?
SLiNv_Vic
Apr 10, 2016
Replies
15
Views
17K
Jun 21, 2016
mrrsm
Keeping revs down - a good thing?
warriorpluto
Aug 18, 2012
Replies
15
Views
1K
Aug 20, 2012
dougman
D
Rattle can.......
07TrailyLS
Jun 21, 2015
Replies
15
Views
2K
Jun 24, 2015
07TrailyLS
D
valvoline transfer case fluid
dacoach
Apr 11, 2016
Replies
15
Views
12K
Apr 14, 2016
HARDTRAILZ
service 4WD light - new style
CodeWhite
Apr 11, 2013
Replies
15
Views
5K
May 12, 2013
TollKeeper
L
Bad head gasket?
Lins Bravada
Mar 29, 2014
Replies
15
Views
1K
Apr 28, 2014
The_Roadie
Straight 6 vs v8 trailblazer EXT
Ghost
Jan 3, 2013
Replies
14
Views
9K
Oct 24, 2018
limequat
P
Whining noise, slow acceleration, MPG's getting worse. What to do next?
POW
Aug 17, 2015
Replies
14
Views
3K
Sep 20, 2015
POW
P
NEED HELP
2006 TrailBlazer "Crank no start"
Mikefred7370
Aug 18, 2018
Replies
14
Views
2K
Aug 19, 2018
Mikefred7370
H
Front Driveshaft Removal to bypass A4wd
hullman8
Oct 10, 2013
Replies
14
Views
10K
Oct 11, 2013
hullman8
H
Flowkooler water pump.
Paul Bell
May 26, 2015
Replies
14
Views
3K
May 28, 2015
Paul Bell
M
Multiple tranny codes and fuse 47 issues
Mcgrath88
Feb 5, 2019
Replies
14
Views
2K
Mar 10, 2019
Paul Bell
are this readings high? ltft stft , and mpg , i have high fuel consumption
yazan
Aug 7, 2021
Replies
14
Views
2K
Aug 17, 2021
Mooseman
Collapsed Radiator Hoses
DJones
Aug 15, 2013
Replies
14
Views
4K
Aug 21, 2013
DJones
T
Add tranny fluid?
thebat
Jul 10, 2019
Replies
14
Views
2K
Jul 11, 2019
freddyboy61
T
Not the standard shift cable problem
Tinker
Aug 29, 2021
Replies
14
Views
2K
Sep 10, 2021
Tinker
T
HYBRID HYDRAULIC ELECTRIC HOIST
mrrsm
Oct 31, 2015
Replies
14
Views
1K
Dec 16, 2015
mrrsm
J
What is your oil pressure??
jd8181
Apr 3, 2012
Replies
14
Views
4K
Apr 5, 2012
davenay67
A
Hesitation/stumble at 50 mph fixed by racing engine on highway but new sound
Ariel Guerra
Jan 16, 2013
Replies
14
Views
1K
Jan 28, 2013
BuckeyeEvan
Worn u joints methinks
Magyver
Jul 20, 2014
Replies
14
Views
2K
Sep 28, 2014
Up And Down
U
C
SOLVED!
Clunking from rear end
Cdrum
Jul 11, 2023
Replies
14
Views
3K
Jul 22, 2023
pell
P
Blue devil oil Leak stop or not???
Double M
Sep 24, 2014
Replies
14
Views
13K
Sep 26, 2014
HARDTRAILZ
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