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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
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Vortec 4.2L I-6
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FAQ: Vortec 4.2L I-6
Mooseman
May 1, 2017
Replies
1
Views
10K
Nov 13, 2020
Mooseman
Sticky
4.2L (LL8) DTC Engine Diagnostic Parameters
Mooseman
Oct 7, 2019
Replies
3
Views
4K
Oct 7, 2019
TJBaker57
Normal threads
I may have found the source of the misfire
6716
Apr 16, 2021
Replies
11
Views
937
Today at 7:06 PM
mrrsm
Y
07 trailblazer 4.2L crank . no start
Yoda222
Jun 14, 2022
2
Replies
41
Views
477
Saturday at 7:37 PM
Mooseman
T
4.2 problem
Topfueltommy69
Mar 23, 2022
Replies
7
Views
485
Jun 21, 2022
TollKeeper
S
Need wrench sizes
Stuntmanmike1977
Mar 18, 2022
Replies
2
Views
365
Jun 21, 2022
rchalmers3
R
S
Wheel play
Stuntmanmike1977
May 31, 2022
Replies
4
Views
285
Jun 6, 2022
Stuntmanmike1977
S
Starts but dies right away
egeekiel
Jul 5, 2018
Replies
30
Views
14K
Jun 3, 2022
Luvfixnjunk
L
IDing P12 Processor, anybody work at Delphi?
limequat
Jan 12, 2013
Replies
8
Views
2K
May 14, 2022
darkman5001
D
S
Rotting away
Stuntmanmike1977
May 9, 2022
Replies
1
Views
307
May 9, 2022
Mooseman
Video: Atlas engine teardown
TollKeeper
May 8, 2022
Replies
1
Views
309
May 8, 2022
Mooseman
T
NEED HELP
"Top End Soak" ... question
TequilaWarrior
Apr 29, 2022
Replies
11
Views
577
May 3, 2022
TollKeeper
S
Dipstick tubes help
Stuntmanmike1977
Apr 30, 2022
Replies
4
Views
349
May 3, 2022
TequilaWarrior
T
C
New Intermediate Shaft Bearing Sounds & Feels Dry
coh998
Apr 28, 2022
Replies
9
Views
401
May 2, 2022
coh998
C
C
Baffles Required In New Oil Pan?
coh998
Apr 28, 2022
Replies
12
Views
402
May 1, 2022
coh998
C
S
Trans. line bracket
Stuntmanmike1977
May 1, 2022
Replies
1
Views
267
May 1, 2022
Stuntmanmike1977
S
G
2006 LL8 - P0171 - Lean LTFT (+12-20%) - Intermittent MIL
griffincox
Apr 30, 2022
Replies
7
Views
360
Apr 30, 2022
Mooseman
K
NEED HELP
2008 Trailblazer No Spark
kw1hf
Apr 21, 2022
Replies
13
Views
499
Apr 29, 2022
budwich
B
S
There really are two front main seals?
Steevo
Apr 27, 2022
Replies
7
Views
477
Apr 28, 2022
Mooseman
T
Slow fuel fill, Gas smell. No codes.
tucker12
Apr 3, 2022
Replies
5
Views
459
Apr 21, 2022
Schurkey
K
yet another lovely 4.2l valve tick
kickass audio
May 21, 2014
2
Replies
55
Views
22K
Apr 18, 2022
mrrsm
SOLVED!
code P0300. What to do next?
mark'stb
Mar 12, 2022
Replies
36
Views
1K
Apr 6, 2022
flyboy2610
Choose your New GM 4.2L LL8 Head Gasket WISELY...
mrrsm
Mar 17, 2022
Replies
16
Views
783
Apr 5, 2022
mrrsm
C
When should I add Marvel Myster Oil or ATF to the oil.....want to do some add'l cleansing....
c good
Apr 5, 2022
Replies
3
Views
363
Apr 5, 2022
Ilikemy3s
R
RPM's
retiredcopper
Feb 27, 2022
Replies
36
Views
1K
Mar 28, 2022
retiredcopper
R
T
SOLVED!
4.2L LL8 Harmonic Balancer Removal/Installation
TopQuark
Sep 17, 2019
Replies
3
Views
4K
Mar 25, 2022
mrrsm
C
Oil swap to help with piston slap?
c good
Feb 14, 2022
Replies
9
Views
874
Mar 14, 2022
TollKeeper
J
Looking at a used '08, possible exhaust manifold leak?
joeredspecial
Aug 18, 2021
Replies
7
Views
1K
Mar 12, 2022
vipergg
V
D
NEED HELP
Wiring diagram & pinout chart .
D.L.G.
Mar 11, 2022
Replies
2
Views
554
Mar 12, 2022
mrrsm
R
Remove and Replace 4.2, 2003 Trailblazer 4wd
rafterk
Feb 9, 2022
Replies
9
Views
994
Mar 4, 2022
rafterk
R
NEED HELP
Fuel pump relay
WhiteWolf
Mar 1, 2022
Replies
3
Views
358
Mar 2, 2022
WhiteWolf
Information on Unique GM 4.2L LL8 Engine Fasteners
mrrsm
Mar 1, 2022
Replies
0
Views
540
Mar 1, 2022
mrrsm
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