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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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OEM Thermostat Temperature
Yesterday at 8:07 PM
Mike534x
Drivetrain
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13.3K
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1.1K
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13.3K
NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
392
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Threads
392
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5.2K
Catalytic converter replacement options EPA vs carb
Feb 18, 2024
Mike534x
LS2 6.0L V8
40
839
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40
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839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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NEED HELP
Valve spring retainers popped off
chaphar540
Aug 31, 2019
Replies
9
Views
4K
Aug 31, 2019
chaphar540
C
H
Valve Cover Gasket
hinkleboys
Jan 9, 2014
Replies
8
Views
1K
Jul 22, 2014
PProph
C
Valve body install questions
cclarkk
Sep 5, 2016
Replies
8
Views
2K
Sep 10, 2016
cclarkk
C
A
Vacumm lines locations
Andy Carpenski
Mar 17, 2020
Replies
6
Views
3K
Mar 18, 2020
Mooseman
used engine
felicie
Sep 11, 2014
Replies
9
Views
1K
Oct 20, 2014
Mooseman
Urgent - Can I connect battery with PCM removed
Mark20
Feb 25, 2012
Replies
4
Views
1K
Mar 9, 2012
sevendj
S
Upgrading to 4.10's
Pittdawg
Dec 18, 2011
Replies
29
Views
3K
Sep 14, 2012
Sparky
O
Unusual Transmission Problem -Fixed
OldSVTGuy
Jan 1, 2013
Replies
2
Views
1K
Jan 1, 2013
OldSVTGuy
O
NEED HELP
UNKNOWN FRONT END NOISE
joshtheawesome
Sep 16, 2017
Replies
11
Views
2K
Sep 25, 2017
HARDTRAILZ
Understanding how the G80 locker functions
Bow_Tied
Jan 19, 2015
Replies
6
Views
1K
Jan 21, 2015
Bow_Tied
Underhood temps 5.3
warriorpluto
Aug 10, 2015
Replies
8
Views
955
Aug 17, 2015
warriorpluto
C
Uncommanded shift into 4HI
ComputernerdBD
Feb 4, 2015
Replies
7
Views
1K
Feb 5, 2015
ComputernerdBD
C
U-Joints
HARDTRAILZ
Jan 20, 2012
Replies
7
Views
2K
Feb 18, 2012
gmcman
Turning 170K and neary 10 years
floridafitz
Jul 21, 2012
Replies
4
Views
1K
Jul 24, 2012
BO TIE SS
B
F
Turbo Or Supercharger?
familywagon12
Nov 17, 2012
Replies
21
Views
2K
Nov 18, 2012
Jkust
J
Trying to Decode my Error Code(s)
l008com
Jan 30, 2023
Replies
21
Views
1K
Feb 18, 2023
Mooseman
Truck put in park, shut off, wont start
blazinlow89
Aug 12, 2015
Replies
2
Views
965
Aug 12, 2015
littleblazer
K
Truck died Need help asap
KEEBZ489
Jan 29, 2021
Replies
17
Views
1K
Feb 3, 2021
KEEBZ489
K
Troubleshooting the NVG 226 transfer case.
DenaliHD66
Jul 23, 2013
Replies
2
Views
3K
Jul 23, 2013
DenaliHD66
T
Transmission worries- 2002 TrailBlazer, Please Help!
Ted Burns
Jul 9, 2019
Replies
6
Views
2K
Jul 10, 2019
Reprise
Transmission works again after shutting engine off
BanditGTP
Feb 19, 2020
Replies
29
Views
5K
Jun 1, 2020
Mooseman
NEED HELP
Transmission wont shift out of park
dvs.dave.03ltz
Mar 14, 2019
Replies
11
Views
2K
Mar 17, 2019
Reprise
J
NEED HELP
Transmission will not shift into any gear
James Benge
Feb 28, 2017
Replies
3
Views
980
Mar 3, 2017
Hatchet
Transmission Upgrades
Traz
Jan 30, 2019
Replies
15
Views
3K
Feb 4, 2019
Traz
J
Transmission trouble?
JackFenimore
Apr 24, 2022
Replies
4
Views
792
Apr 24, 2022
Mooseman
C
Transmission squeal
chrisN
Jun 25, 2015
Replies
13
Views
1K
Jun 26, 2015
chrisN
C
K
transmission slipping
KVicars
Jan 24, 2018
Replies
4
Views
1K
Feb 14, 2018
Reprise
Transmission slip or clunk between first and second
Iahawkeye
Mar 11, 2012
Replies
7
Views
5K
Mar 14, 2012
seanpooh
I
Transmission Shifting - Synthetic?
Instrumental
Feb 14, 2012
Replies
6
Views
1K
Feb 15, 2012
Sparky
Transmission Shift Cable
Petnatcar
Sep 18, 2018
Replies
6
Views
1K
Sep 19, 2018
Petnatcar
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