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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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C
Purging air from cooling system/Odd idle?? *urgent request*
CarneySC
Sep 8, 2013
Replies
5
Views
15K
Sep 9, 2013
eXplicit
F
Rough idle, surging while driving, hesitation on takeoff but not always.
Firelancer
Mar 4, 2015
Replies
6
Views
15K
Sep 29, 2018
Mooseman
RPM's Jump After Cleaning Throttle Body
jason43080
Jun 22, 2012
2
Replies
46
Views
14K
Jul 1, 2012
The_Roadie
D
06 trailblazer - No start, No crank - new starter, Ignition switch, starter relay
dragginblazer
Oct 20, 2014
Replies
4
Views
14K
Oct 30, 2014
DenaliHD66
Need engine: Pull from PickNPull or Buy already pulled?
limequat
Aug 31, 2018
2
3
Replies
83
Views
14K
Dec 25, 2018
Traz
2002 TB RPMs Surging at highway speeds
nolongerseemssofar
Jul 6, 2014
Replies
18
Views
14K
Jul 8, 2014
nolongerseemssofar
M
Removing and installing new torque converter
Mommymobile8
Oct 26, 2012
Replies
13
Views
14K
Nov 7, 2012
dfc739
B
Slight hesitation or bucking in 4th gear.
bugeyed
Nov 9, 2014
Replies
15
Views
14K
Jan 24, 2023
Mooseman
J
Water Pump Replacement - do the fan clutch at the same time?
joe mama
Dec 15, 2014
Replies
10
Views
14K
Jan 30, 2015
joe mama
J
My "cursed" engine rebuild
Bondo07
Mar 6, 2017
2
3
Replies
117
Views
14K
Nov 25, 2018
m.mcmillen
Stabilitrak Light came on, on drive home.
LouisTB
Sep 17, 2020
Replies
9
Views
14K
Oct 14, 2020
Mooseman
L
Envoy Acceleration Issue
Lasasj
Jan 26, 2014
Replies
11
Views
14K
Feb 17, 2014
The_Roadie
What years are interchangeable on the I6 4.2 engine?
Gearheadvr4
Aug 25, 2015
Replies
7
Views
14K
Aug 26, 2015
Tiggerr
M
NEED HELP
2004 Trailblazer - initial code p0300
mgbspeedy
Feb 11, 2019
Replies
35
Views
14K
Aug 5, 2020
Yotarolla97
Y
Alternator and Thermostat Replacement (How-to)
marinegrunt
Jan 17, 2015
Replies
12
Views
14K
Apr 7, 2021
JayArr
One year summary of PCM4Less tuned PCM
WarGawd
Apr 9, 2014
Replies
15
Views
14K
Apr 29, 2014
HARDTRAILZ
Harmonic Balancer Wobble
Maverick6587
Feb 4, 2019
Replies
24
Views
14K
Feb 18, 2019
Mooseman
Help to identify top end noise
gmcman
Mar 7, 2019
2
3
Replies
117
Views
13K
Dec 5, 2021
mrrsm
W
Reduced engine power light outta nowhere
Whoy
Apr 27, 2014
2
3
Replies
110
Views
13K
Jan 9, 2016
Midnyteryder196
How to Clean an 4.2 Inline 6 Throttle Body
JRTAHOE
Dec 3, 2011
Replies
23
Views
13K
Jul 28, 2012
LBB
L
Wheel hub assembly failure?
Busterbrown
Dec 4, 2012
2
Replies
42
Views
13K
Feb 19, 2013
tom1999d
T
W
NEED HELP
Vortec 4.2L I-6 2006 Trailblazer 2 Wheel Drive Oil Pan Removal
wes112565
Jan 2, 2017
Replies
37
Views
13K
Feb 13, 2017
wes112565
W
I6 underhood service specifications
MAY03LT
Nov 30, 2011
Replies
33
Views
13K
May 23, 2016
Mooseman
R
RPM dip when lightly pressing accelerator at idle
RyanTBZ
Sep 27, 2014
Replies
12
Views
13K
Nov 30, 2014
joe mama
J
F
Fan clutch is frozen to the water pump
flyntgr1
Nov 1, 2014
Replies
25
Views
13K
Dec 29, 2022
TJBaker57
B
4.2 chain tensioner/tool for head removal
broke4now
Sep 14, 2012
Replies
5
Views
13K
Sep 18, 2012
broke4now
B
Cam shaft
Traz
Jan 27, 2018
Replies
32
Views
13K
Feb 4, 2018
Reprise
C
torque settings for the 2006 trailblazer intake manifold gaskets.
cbduffeck
Jan 14, 2013
Replies
3
Views
13K
Jan 15, 2013
Wooluf1952
0
Help! please Ive got a code P0606
04Trailblazer
Aug 14, 2012
Replies
10
Views
13K
Oct 22, 2015
Eric04
P
replacing water pump
psycho91
Jun 18, 2012
Replies
16
Views
13K
Apr 1, 2014
BRomanJr
B
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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
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