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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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NEED HELP
2002 Chevy Trailblazer no crank
BlueDazing
Mar 22, 2023
2
3
4
Replies
158
Views
7K
Oct 27, 2023
TJBaker57
Z
NEED HELP
05 Trailblazer Fuel Gauge Problem. Bad PCM?
Zmoney
Jun 4, 2021
2
3
Replies
85
Views
7K
Sep 8, 2021
Mramses
M
NEED HELP
P0300 p1514, engine power reduced, white smoke
yazan
Mar 18, 2019
2
3
Replies
81
Views
12K
May 8, 2019
Mooseman
NEED HELP
Bad knocking
redline customs
Sep 19, 2016
2
Replies
58
Views
12K
Oct 7, 2016
littleblazer
NEED HELP
Wont start after engine swap
dvs.dave.03ltz
May 16, 2018
2
Replies
56
Views
17K
Oct 3, 2018
dvs.dave.03ltz
NEED HELP
Engine stalling. No codes
yazan
Jun 24, 2019
2
Replies
53
Views
8K
Jul 12, 2019
Mooseman
NEED HELP
Best way to lock flywheel for harmonic balancer replacement.
Timber531
Jun 10, 2021
2
Replies
52
Views
7K
Aug 22, 2021
Mooseman
G
NEED HELP
Engine Replaced - Won't Start
Gaffer
Jul 20, 2019
2
Replies
40
Views
9K
Mar 7, 2020
Gaffer
G
G
NEED HELP
4.2 cylinder sleeve replacement
Gfmdesign
Nov 12, 2023
2
Replies
40
Views
2K
Mar 19, 2024
mrrsm
W
NEED HELP
Vortec 4.2L I-6 2006 Trailblazer 2 Wheel Drive Oil Pan Removal
wes112565
Jan 2, 2017
Replies
37
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13K
Feb 13, 2017
wes112565
W
NEED HELP
Can p0171 be related to sais
jeffro312
Sep 13, 2016
Replies
37
Views
5K
Oct 17, 2016
Mooseman
M
NEED HELP
2004 Trailblazer - initial code p0300
mgbspeedy
Feb 11, 2019
Replies
35
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14K
Aug 5, 2020
Yotarolla97
Y
M
NEED HELP
fuel smell—-I changed almost everything
mudpaws672
May 10, 2021
Replies
33
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5K
Oct 4, 2021
Chickenhawk
S
NEED HELP
Multiple codes
Sworsley
Nov 5, 2020
Replies
32
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4K
Nov 11, 2020
KEEBZ489
K
R
NEED HELP
Need to replace 2006 4.2L
Ryan C
Oct 19, 2015
Replies
31
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3K
Dec 3, 2015
Ryan C
R
D
NEED HELP
SAIS pump problem
daisey
Aug 7, 2020
Replies
31
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3K
Aug 22, 2020
daisey
D
0
NEED HELP
New buy- rod knock
06'9-7x
Aug 10, 2019
Replies
31
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3K
Aug 14, 2019
gmcman
U
Solved
NEED HELP
P1860 and other codes
Uncleenvoy
Apr 17, 2020
Replies
30
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3K
Jun 7, 2020
Uncleenvoy
U
P
NEED HELP
Had one code now have two.
pell
Jun 6, 2017
Replies
30
Views
3K
Jan 24, 2018
djthumper
R
NEED HELP
Intake manifold bolts
Raph
Jul 14, 2019
Replies
30
Views
11K
Nov 30, 2020
Dadwagon
H
NEED HELP
A/C Blowing hot air most of the time!
Hobbyist4Life
Sep 5, 2016
Replies
30
Views
4K
Jun 18, 2018
Hobbyist4Life
H
NEED HELP
Engine bogs under throttle
LT1transAM
Apr 1, 2017
Replies
30
Views
8K
Apr 24, 2017
LT1transAM
NEED HELP
New fuel pump in and now a whole new problem.
xavierny25
Dec 7, 2018
Replies
29
Views
3K
Dec 12, 2018
mrrsm
M
NEED HELP
Transfer case issues
matty8412
Sep 5, 2019
Replies
28
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3K
Dec 8, 2019
matty8412
M
NEED HELP
Idle Hunting While Using Air Conditioning
therealsethallen
Jun 21, 2016
Replies
28
Views
4K
Jul 2, 2016
therealsethallen
NEED HELP
PCM Questions
SnowBlazer
Feb 23, 2016
Replies
26
Views
2K
Feb 26, 2016
limequat
R
NEED HELP
P0171 Lean Code
Reed
Jun 20, 2019
Replies
26
Views
6K
Jun 23, 2020
zaid3ssaf
NEED HELP
02 EXT LT, P1860, P740, P753, P758, P785. Under-hood fuse #34 blown
Brando_TB
Nov 17, 2020
Replies
24
Views
3K
Apr 8, 2021
Brando_TB
NEED HELP
Battery and Alternator for Sound System Upgrade
NelliM60
Feb 20, 2018
Replies
23
Views
3K
Feb 23, 2018
HARDTRAILZ
NEED HELP
03 Trailblazer multiple codes
TADave
Feb 18, 2016
Replies
23
Views
3K
Feb 25, 2016
Inferno333
I
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