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2002 - 2009 TrailBlazer/Envoy Tech
02-09 Vortec 4.2L I-6 Engine and Drivetrain
Engine Tunes/Mods
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61
J
Stalling after warm up
Jaa1
Mar 17, 2024
0
56
Mar 17, 2024
by
Jaa1
H
[SOLVED]
Random misfiring
Huskerhandy
Jan 15, 2012
9
35K
Mar 7, 2024
by
Ravalli Surfer
R
random misfire/idle issues
Rafael_
Feb 10, 2024
25
256
Feb 25, 2024
by
Ravalli Surfer
J
Random misfire and super rough idle
Jordan Wilson
Feb 4, 2024
1
202
Feb 6, 2024
by
chem_man
R
timing dark links do not line up when crankshaft turnd 780 degrees
royl1954
Jan 30, 2024
5
193
Feb 6, 2024
by
Bex914
Performance upgrades
johnrossman053
Jan 14, 2024
2
280
Jan 16, 2024
by
Ravalli Surfer
W
Head and block compatibility
weslyaustin
Nov 5, 2023
0
305
Nov 5, 2023
by
weslyaustin
R
Anyone sell pistons/performance parts for the 4.2?
RamAirZ
Aug 14, 2006
10
21K
Oct 15, 2023
by
ecash6809
J
Trailblazer
JSSclone
Oct 10, 2023
2
436
Oct 10, 2023
by
Ravalli Surfer
Turbo tuning for 4.2L
02Bravado
Mar 10, 2010
30
14K
Oct 3, 2023
by
J Whit
D
Engine Swap HELP!
dm28
Jul 7, 2013
10
4K
Jul 6, 2023
by
Ravalli Surfer
T
Reduced Engine Power
trailblazer12
Jul 7, 2011
7
6K
Jun 26, 2023
by
crxevan
G
AC delco iridium plugs- pre-gapped?
glenjw1969
Sep 12, 2009
9
4K
Jun 20, 2023
by
Ravalli Surfer
P10 tuning
Vetteyog
May 16, 2023
4
2K
May 16, 2023
by
metalmike187
F
Plug ln performance devices
fllflash
Apr 4, 2023
7
1K
Apr 5, 2023
by
Ravalli Surfer
Swapping 06 with a 04 transmission and motor
Christian_h9300
Mar 19, 2023
1
896
Mar 20, 2023
by
VoyBoy919
2007 Envoy help!!
davisjamie514
Feb 16, 2023
2
77
4K
Mar 6, 2023
by
BobbyA
No throttle response in gear after stage 2 cam installed.
Miketizzl
Feb 26, 2023
0
552
Feb 26, 2023
by
Miketizzl
D
Fuel Injector Cleaning
dmtaurus
Sep 5, 2010
9
4K
Feb 19, 2023
by
chem_man
E-fans "proven design" that work...
pjaneiro
Nov 11, 2008
2
3
4
137
51K
Jan 30, 2023
by
williamsoa7791_3199
Looking for an engine
alvaradooj88
Dec 16, 2022
2
840
Dec 16, 2022
by
Brad_
PCM Hammer/TunerPro
Vetteyog
Dec 2, 2022
0
1K
Dec 2, 2022
by
Vetteyog
K
Slight shake (not vibration) at idle?
kcducttaper
Sep 17, 2018
2
2K
Nov 30, 2022
by
Daveinfl33777
R
New E-FAN Solution: AVID Performance
Roggie
Feb 23, 2009
2
3
98
49K
Nov 24, 2022
by
anton74
M
Scan Tool Apps and P0440
mikejenner972
Nov 9, 2022
7
1K
Nov 18, 2022
by
chem_man
I6 to V8 swap help!?
McKinley
Jul 1, 2008
17
16K
Nov 13, 2022
by
chem_man
2008 Piston 2 parting ways
Calabria
Nov 7, 2022
2
920
Nov 9, 2022
by
Ravalli Surfer
How to handle SIEZED spark plugs
eddiec
Oct 7, 2022
5
2K
Oct 31, 2022
by
tomcat709
R
Acceleration issue. Been chasing this for awhile.
Rodhead2001
May 17, 2022
2
35
4K
Oct 10, 2022
by
Miss2swift
P
2003 Envoy SLT 4.2 Fuel Filter Change
PBoneBallSack
Dec 8, 2011
4
5K
Oct 10, 2022
by
Miss2swift
2008 4.2 LS Engine wiring harness replace or repair
Calabria
Sep 26, 2022
22
4K
Oct 1, 2022
by
Calabria
K
Rough shut down
Kylep
Jun 12, 2019
12
8K
Sep 27, 2022
by
Jonbarr63
J
PCM Swap-Truck Won't start
jestersdead
Nov 7, 2010
9
10K
Sep 16, 2022
by
Ravalli Surfer
Atlas 4.2L "Race" camshafts
Schurkey
Aug 23, 2022
0
1K
Aug 23, 2022
by
Schurkey
2004 Chevy trailblazer EXT Lt no start
deGroat100403
Jun 24, 2022
4
1K
Jun 30, 2022
by
tokanero
1
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02-09 Vortec 4.2L I-6 Engine and Drivetrain
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