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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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S
stuck spark plugs
sunliner
Jan 2, 2015
2
3
Replies
82
Views
11K
Jan 21, 2015
AWD V8
NEED HELP
P0300 p1514, engine power reduced, white smoke
yazan
Mar 18, 2019
2
3
Replies
81
Views
12K
May 8, 2019
Mooseman
2 quarts of oil, no big symptoms and no leaks?
Gerbil21
Jan 23, 2015
2
3
Replies
81
Views
11K
Feb 20, 2015
Gerbil21
A
PCMFORLESS NEW E-Fan Setup and PCMFORLESS INTAKE
andy702252
Mar 26, 2012
2
3
Replies
80
Views
8K
Apr 30, 2012
limequat
4.2 to 5.3 Engine Swap Talk
groundshock
Mar 13, 2013
2
Replies
77
Views
54K
Oct 5, 2019
mrrsm
DIY air intake with IAT sensor
Shdwdrgn
Dec 9, 2011
2
Replies
76
Views
16K
Apr 2, 2013
ShadowClutch
S
Need some Advice new Timkin Wheel hubs on there way
jeffro312
Mar 25, 2013
2
Replies
76
Views
4K
Mar 29, 2013
CaptainXL
C
Dreaded knock sound is starting
gmcman
Apr 13, 2014
2
Replies
72
Views
33K
Apr 20, 2015
gmac310
Switching to Synthetic
03envoy
Feb 4, 2012
2
Replies
71
Views
5K
Mar 3, 2012
gmcman
S
2005 Chevy TB LS I6 4.2 starts but stalls 2-3 seconds later
Sean
Jan 28, 2015
2
Replies
70
Views
5K
Feb 17, 2015
Sean
S
C
Rough idle in drive, runs rich, catalyst P code
coleman
Mar 1, 2013
2
Replies
69
Views
5K
Mar 21, 2014
fixnux
F
M
Coolant thermostat/temp questions
Marksman762
Dec 11, 2013
2
Replies
69
Views
22K
Mar 30, 2014
jes1888
J
Cruise control ?????
Ghost
Jun 19, 2012
2
Replies
68
Views
5K
May 6, 2015
littleblazer
190,000 Miles 2004 TB EXT 4.2
KNBlazer
Feb 18, 2014
2
Replies
68
Views
4K
Aug 16, 2014
loondog33
Z
Knocking noise at idle
Zx2ner88
Mar 22, 2013
2
Replies
67
Views
16K
Aug 8, 2013
CaptainXL
C
E
Baked on oil: plugs #5 and #6
EPfiffner
Jun 13, 2018
2
Replies
67
Views
9K
Jul 21, 2019
EPfiffner
E
M
Woke up today & P1345!
MichEnvoyGuy
Feb 19, 2012
2
Replies
67
Views
20K
Mar 6, 2014
IllogicTC
Distance per tank
Mirror
Dec 24, 2014
2
Replies
66
Views
3K
Mar 9, 2015
littleblazer
G
yes another P0171 and 900 RPM thread that needs your help
gica
Feb 17, 2023
2
Replies
65
Views
3K
Mar 22, 2023
gica
G
M
Thermostat bad?
MichEnvoyGuy
Dec 29, 2011
2
Replies
64
Views
8K
Mar 11, 2013
Jayman
C
Envoy Stalled At Stop Light - 3rd Incidence in 1 year.
CaptainXL
Jun 8, 2012
2
Replies
63
Views
7K
Oct 23, 2013
CaptainXL
C
W
2004 TB - I6 4WD - Manifold Red Hot
webdawg
Jan 4, 2016
2
Replies
63
Views
7K
Feb 7, 2016
Chickenhawk
Stock Exhaust
Pittdawg
Jul 8, 2012
2
Replies
62
Views
6K
Sep 26, 2012
Flash12623
F
Green Filter Experience
HARDTRAILZ
Nov 28, 2011
2
Replies
62
Views
8K
Oct 17, 2013
Grimor
Rough idle, what's causing?
tsmith1156
Jun 2, 2016
2
Replies
62
Views
4K
Jun 17, 2016
tsmith1156
R
2008 Trailblazer Atlas Engine Noise
Red955i
Sep 10, 2020
2
Replies
62
Views
7K
Sep 28, 2020
Red955i
R
engine differences
Grimor
Apr 5, 2014
2
Replies
60
Views
5K
Jul 19, 2014
Grimor
C
04 TB EXT and POOR gas mileage
convincer253
Apr 4, 2012
2
Replies
60
Views
6K
Apr 6, 2014
gmcman
A
05 TB won't start after head gasket replacement
AirSick
Aug 12, 2013
2
Replies
59
Views
3K
Sep 17, 2013
gmcman
Cracked Exhaust Manifold
lmcree
Apr 20, 2013
2
Replies
59
Views
21K
Feb 13, 2023
mrrsm
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