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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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FAQ: Vortec 4.2L I-6
Mooseman
May 1, 2017
Replies
1
Views
20K
Nov 13, 2020
Mooseman
Sticky
4.2L (LL8) DTC Engine Diagnostic Parameters
Mooseman
Oct 7, 2019
Replies
3
Views
7K
Oct 7, 2019
TJBaker57
Normal threads
D
More PCM tune questions
dhanger
May 1, 2025
Replies
14
Views
816
Yesterday at 12:19 PM
Mooseman
C
Normal operating temps
captain150
Tuesday at 9:56 PM
Replies
4
Views
135
Wednesday at 1:50 PM
captain150
C
D
Radiator Bushings disintegrated
DIYguy
Jun 14, 2025
Replies
6
Views
172
Jun 15, 2025
DIYguy
D
NEED HELP
2002 Chevy Trailblazer no crank
BlueDazing
Mar 22, 2023
2
3
4
Replies
159
Views
13K
Jun 5, 2025
POSL
P
Running too cold in the summer.
Sqrly
May 23, 2025
Replies
6
Views
436
Jun 5, 2025
Mooseman
NEED HELP
Battery Dead... but not.
Roamingdoc
May 26, 2025
Replies
9
Views
479
Jun 4, 2025
c good
C
Evap Large Leak Code
GreenBravada
Apr 18, 2025
Replies
7
Views
678
Jun 2, 2025
TJBaker57
E
NEED HELP
Weird top end knock
edibleMango
May 10, 2025
Replies
12
Views
1K
May 21, 2025
Mooseman
Temp loss of throttle when cold
jmonica
May 14, 2025
Replies
6
Views
464
May 19, 2025
mrrsm
NEED HELP
Secondary air injection valve pin out
MPB
May 13, 2025
Replies
17
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975
May 15, 2025
TJBaker57
B
Exhaust manifold record?
budwich
Apr 10, 2025
Replies
17
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1K
May 12, 2025
Mooseman
S
Cylinder 5 Misfire
seadoojetski
Apr 30, 2025
Replies
2
Views
316
Apr 30, 2025
Mooseman
More Newbie Adventures: Power steering cooler?
GreenBravada
Apr 23, 2025
Replies
2
Views
580
Apr 24, 2025
GreenBravada
High Idle on startup, then settles down.
GreenBravada
Apr 8, 2025
Replies
15
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1K
Apr 19, 2025
Mooseman
Coolant Temperature/Thermostat Question
GreenBravada
Apr 17, 2025
Replies
5
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501
Apr 17, 2025
Mooseman
Slightly High Oil Pressure Reading
6stringbass
Apr 17, 2025
Replies
1
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298
Apr 17, 2025
Mooseman
The dreaded electro viscous fan - maybe a fix?
Dr.Fiero
Apr 9, 2025
Replies
4
Views
489
Apr 12, 2025
Dr.Fiero
'06 4.2L-Filthy oil inside air plenum.
stvrob
Jan 19, 2016
2
Replies
42
Views
29K
Mar 10, 2025
59840Surfer
K
SOLVED!
Airbag Light
krunal88
Mar 7, 2023
Replies
16
Views
2K
Mar 8, 2025
Georgev
G
2002 Envoy Transmission leak
Drec
Mar 5, 2025
Replies
3
Views
549
Mar 7, 2025
Drec
C
Junk starter, or maybe something else?
chuey_316
Feb 24, 2025
Replies
9
Views
677
Feb 28, 2025
Mooseman
W
2002 GMC Envoy exhaust leak
Wano
Jan 27, 2025
Replies
20
Views
2K
Jan 31, 2025
Mooseman
NEED HELP
Oil Pressure guage drops to zero (sometimes) during idle
stvrob
Jun 26, 2023
Replies
16
Views
2K
Jan 18, 2025
TJBaker57
S
Electric fans
Stuntmanmike1977
Oct 30, 2024
Replies
20
Views
2K
Jan 16, 2025
Stuntmanmike1977
S
Help 05 trailblazer won't run right after engine swap
Dbtdesmoinesiowa
Feb 19, 2020
Replies
6
Views
2K
Jan 11, 2025
Mooseman
New coil pack - how to avoid snapping off the bolt?
Chickenhawk
Dec 31, 2024
Replies
9
Views
1K
Jan 4, 2025
Chickenhawk
R
2007 engine into 2002 with ecu swap.
raven007
May 10, 2019
Replies
14
Views
3K
Dec 26, 2024
Mooseman
B
NEED HELP
Belt Squeal Diagnosis
benjaminblazer
Dec 13, 2024
Replies
14
Views
1K
Dec 24, 2024
benjaminblazer
B
B
what is the meaning of this data... cam phaser
budwich
Dec 18, 2024
Replies
6
Views
834
Dec 18, 2024
budwich
B
Very Slight Miss at Idle
Mooseman
Nov 11, 2018
2
Replies
63
Views
15K
Dec 11, 2024
Mooseman
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