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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
New
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38.8K
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38.8K
J
Gas tank venting issues can't fill
Yesterday at 4:00 PM
johnny be good
Drivetrain
New
1.1K
13.3K
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1.1K
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13.3K
NEED HELP
Tranny slipping and surging. 4WD switch flashing
55 minutes ago
mrrsm
Vortec 5.3L V8
392
5.2K
Threads
392
Posts
5.2K
Catalytic converter replacement options EPA vs carb
Feb 18, 2024
Mike534x
LS2 6.0L V8
40
839
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40
Posts
839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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H
Would a certified GM shop do this???
h-m
Feb 25, 2014
Replies
29
Views
2K
Jun 30, 2014
dmanns67
M
same trucks 2 different power output.
minisuv
Jun 1, 2015
Replies
29
Views
2K
Jun 4, 2015
minisuv
M
L
03 Envoy rattling in 2HI over 40mph
lschafroth
Mar 18, 2014
Replies
29
Views
3K
Jun 20, 2018
lschafroth
L
Transmission works again after shutting engine off
BanditGTP
Feb 19, 2020
Replies
29
Views
4K
Jun 1, 2020
Mooseman
NEED HELP
Exhaust drone
hawkeye405
Jan 4, 2019
Replies
29
Views
6K
Jan 17, 2019
hawkeye405
I
Preferred Transmission Fluid
Instrumental
Apr 6, 2012
Replies
29
Views
5K
Sep 4, 2012
Lima Tango
P
Diagnosing and prep for harmonic balancer replacement 4.2 L I6
pastorbud
Apr 1, 2023
Replies
29
Views
1K
Apr 12, 2023
mrrsm
R
replacing thermostat, need opinions
Revans381996
Jul 2, 2014
Replies
28
Views
2K
Jul 10, 2014
Revans381996
R
Year long battle is finally over...
Boricua SS
Jul 18, 2013
Replies
28
Views
2K
Jul 20, 2013
Boricua SS
Where to purchase fan clutch
gmcman
Feb 28, 2013
Replies
28
Views
2K
Mar 21, 2013
DFWWIZ
NEED HELP
Possible bad fuel pump (confirmation needed)
ghost_leader07
Nov 8, 2023
Replies
28
Views
914
Nov 14, 2023
mrrsm
J
Cooling question
jd8181
Mar 27, 2012
Replies
28
Views
2K
Apr 5, 2012
David B.
Coil Packs
Shaw520
Sep 21, 2017
Replies
28
Views
4K
Oct 31, 2017
Shaw520
N
Idles at 900
NJTB
Oct 3, 2013
Replies
28
Views
3K
Jun 6, 2014
NJTB
N
New fan clutch installed. Have a question
snoozer
Jun 1, 2017
Replies
27
Views
6K
Nov 2, 2018
David Mellado
A
Time for a new truck - need advise
ahimon
Jan 10, 2013
Replies
27
Views
2K
Feb 27, 2014
dmanns67
please advise, change oil light.
joepro17
Aug 20, 2013
Replies
27
Views
2K
Aug 23, 2013
Mark20
T
Check Engine Light Confusion
TNEnvoyXL
Mar 8, 2013
Replies
27
Views
2K
Apr 6, 2013
TNEnvoyXL
T
Fuel gauge problems. Cluster or sending unit ???
bmartinezx3
Nov 10, 2012
Replies
27
Views
4K
May 18, 2014
BlazingTrails
J
Trailblazer crank no start
John1969
Jun 5, 2020
Replies
27
Views
3K
Jun 10, 2020
TollKeeper
4wd Axle Disconnect...Replace or Repair
BanditGTP
Mar 16, 2020
Replies
27
Views
5K
Sep 8, 2021
chris68369
C
N
Exhaust manifold bolts
NJTB
Sep 30, 2014
Replies
27
Views
2K
Dec 7, 2014
BlazingTrails
P
Throttle Position %?
PLAT515
Nov 26, 2022
Replies
27
Views
1K
Dec 3, 2022
PLAT515
P
Service Engine and Reduce Engine Power lights
hawkeye405
Jan 30, 2017
Replies
27
Views
6K
Feb 19, 2017
hawkeye405
My Trailblazer is dying
MikeHayes
Apr 29, 2018
Replies
26
Views
2K
May 20, 2018
vipergg
V
J
Metal on metal grinding noise, louder on right curve/turn
jemmie
Jul 1, 2012
Replies
26
Views
14K
Jul 8, 2012
jemmie
J
N
Differential cover
NJTB
Apr 12, 2020
Replies
25
Views
2K
Nov 14, 2020
Mooseman
Locked
Are the '02 & '04 Atlas Engines Fully Interchangeabe?
mrrsm
Jun 22, 2016
Replies
25
Views
2K
Jun 23, 2016
mrrsm
S
NEED HELP
4x4 Working strange
Sn1perdeath
Aug 27, 2021
Replies
25
Views
2K
Sep 10, 2021
chris68369
C
H
2006 transfer case issue
h-m
Feb 1, 2014
Replies
25
Views
4K
Feb 20, 2014
The_Roadie
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