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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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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
36 minutes ago
Mooseman
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
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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J
Envoy transfer case encoder motor stuck in neutral?
jmac219
Sep 12, 2014
Replies
23
Views
14K
Oct 1, 2014
IllogicTC
G
dangers when disconnecting battery on Trailblazer
greggraves
Apr 9, 2014
Replies
18
Views
14K
Jul 19, 2014
The_Roadie
X
Fuse to reset PCM
xtremeskier97
Feb 14, 2012
Replies
8
Views
13K
Feb 14, 2012
PProph
Blue devil oil Leak stop or not???
Double M
Sep 24, 2014
Replies
14
Views
13K
Sep 26, 2014
HARDTRAILZ
T
Locked
SOLVED!
Cylinder Head and timing chain headaches.
tucker12
May 20, 2020
2
3
Replies
96
Views
13K
Aug 13, 2021
Mooseman
M
Something bad happened - Sunshell?
MichEnvoyGuy
Oct 6, 2013
Replies
33
Views
13K
Nov 5, 2013
triz
Let's talk tranny/transfer case/diff fluids!
shovenose
Jul 7, 2017
Replies
23
Views
13K
Aug 9, 2017
BrianF
B
C
4.2 keeps losing oil pressure
chuey_316
Feb 4, 2021
2
3
4
Replies
133
Views
13K
Jul 18, 2021
chuey_316
C
Broken Coil Pack Bolt...
jason43080
Jun 30, 2013
Replies
11
Views
13K
Jul 3, 2013
triz
P
The dreaded Transmission Flush
pgibbzz
Aug 22, 2013
2
Replies
54
Views
13K
Sep 21, 2020
JayArr
M
'06 Envoy 4.2: Crank but will not start
mlkmgr
Jun 1, 2014
Replies
21
Views
13K
Jul 13, 2014
PProph
Can I Clean it with Carb Cleaner?
Freddy G.
Mar 10, 2012
Replies
8
Views
12K
Mar 10, 2012
JerryIrons
J
D
valvoline transfer case fluid
dacoach
Apr 11, 2016
Replies
15
Views
12K
Apr 14, 2016
HARDTRAILZ
S
Engine knock with a p0014 and p0016
smoke624
May 27, 2014
Replies
22
Views
12K
Jun 1, 2014
smoke624
S
D
2006 Trailblazer with 4.2 I6, hesitation and stuttering
Dixondb
Jul 15, 2014
Replies
6
Views
12K
Jul 17, 2014
gmcman
Engine surges while in overdrive while doing consistent speed
dla442
Nov 30, 2013
Replies
20
Views
12K
Mar 12, 2015
Hatchet
L
2002 Bravada AWD not working.
lovesrugers
Jan 25, 2012
Replies
12
Views
12K
Feb 3, 2012
lovesrugers
L
J
Fan Clutch going bad?
joe mama
Mar 26, 2012
Replies
11
Views
11K
Mar 30, 2012
scalawag
S
NEED HELP
High Negative LTFT / Poor Gas Mileage
2advanced
May 27, 2019
2
Replies
51
Views
11K
Aug 8, 2019
Tankcruiser
K
torque specs for thermostat bolts
kctrailblazer
Feb 26, 2014
Replies
4
Views
11K
Feb 26, 2014
kctrailblazer
K
My efan setup (Montana/Venture efans)
Mooseman
Mar 19, 2012
2
Replies
79
Views
11K
Mar 3, 2014
Sparky
03 trailblazer cranks but wont start
Bobbi wells
Jan 25, 2017
Replies
13
Views
11K
Feb 18, 2017
Denalli69
D
B
SOLVED!
Randomly stalled and wont restart. P1515 p1516 codes.
BonezCustoms
Jan 19, 2020
Replies
10
Views
11K
Mar 12, 2021
JEREMY HALLETT
Torque converter to flexplate position relationship?
jmonica
May 30, 2016
Replies
8
Views
11K
Jun 19, 2016
mrrsm
what happens if I overfill tree he 4l60e?
6716
Mar 30, 2019
Replies
3
Views
11K
Apr 1, 2019
6716
M
Saab 9-7x stuck in AWD
Marty
May 15, 2013
Replies
23
Views
10K
Mar 25, 2019
TequilaWarrior
T
C
2002 trailblazer wont start once warmed up
chet
Feb 24, 2014
Replies
18
Views
10K
Mar 23, 2014
KNBlazer
F
03 Envoy cranks but will not start
fastlane1801
Mar 15, 2014
Replies
11
Views
10K
Mar 16, 2014
IllogicTC
B
cracked exhaust manifold
BeenBlazin
Feb 18, 2012
2
Replies
56
Views
10K
Oct 12, 2012
dfc739
Light vibration around 1900 RPM, through gas pedal *only*
dkvasnicka
Sep 20, 2015
Replies
16
Views
10K
Oct 23, 2015
dkvasnicka
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