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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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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
890
Dec 18, 2024
budwich
B
Very Slight Miss at Idle
Mooseman
Nov 11, 2018
2
Replies
63
Views
16K
Dec 11, 2024
Mooseman
B
PO171 and PO172??
benjaminblazer
Nov 27, 2024
Replies
22
Views
2K
Dec 11, 2024
benjaminblazer
B
S
Steering wheel mod
Stuntmanmike1977
Dec 4, 2024
Replies
2
Views
660
Dec 11, 2024
Stuntmanmike1977
S
How to do a fuel pressure leak down test on a 2004 4.2 i6?
Sqrly
Nov 27, 2024
Replies
5
Views
772
Nov 27, 2024
TJBaker57
P
Tackling issues
patrickd
Nov 19, 2024
Replies
8
Views
872
Nov 24, 2024
patrickd
P
C
Finally Adding an oil pressure gauge. Should I get one that also gives me oil temp?
c good
Sep 16, 2024
Replies
6
Views
1K
Nov 21, 2024
c good
C
C
Valvoline Restore and Protect? Worth a try?
c good
Nov 5, 2024
Replies
4
Views
2K
Nov 17, 2024
c good
C
R
Governor speed limit
Reiki08
Nov 10, 2024
Replies
8
Views
878
Nov 11, 2024
Mooseman
Valve cover gaskets...need some input. (2003 GMC Envoy XL 4.2L)
Alec Venable
Oct 8, 2024
Replies
17
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3K
Nov 4, 2024
Alec Venable
D
Anybody interested in a 1000 hp 4.2L project
DIYguybob
Oct 16, 2024
Replies
2
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761
Oct 17, 2024
Mooseman
A
NEED HELP
Light Rumble...
AC75TB07
Oct 8, 2024
Replies
21
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2K
Oct 16, 2024
mrrsm
M
Throttle body backprobing
m_jimmer
Oct 10, 2024
Replies
3
Views
762
Oct 15, 2024
mrrsm
New driving issue reared it's head
doctor al
Oct 7, 2024
Replies
11
Views
993
Oct 8, 2024
Mooseman
M
Issues starting, coolant gauge not reading.
Mothman
Oct 5, 2024
Replies
5
Views
718
Oct 6, 2024
Mooseman
C
Toque specs for Rear Diff Cover?
c good
Sep 20, 2024
Replies
2
Views
628
Sep 21, 2024
c good
C
T
SOLVED!
4.2L LL8 Harmonic Balancer Removal/Installation
TopQuark
Sep 17, 2019
Replies
25
Views
14K
Sep 20, 2024
TJBaker57
What size threads or adapter to check oil pressure at sending unit
gmcman
Apr 5, 2014
Replies
23
Views
67K
Sep 11, 2024
Djhall
D
M
4.2L running hot under load
mrwhipper
Aug 27, 2024
Replies
29
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2K
Sep 9, 2024
mrwhipper
M
M
LOUD BUZZING FROM UNDER THE HOOD
MotorboatDDs
Sep 5, 2024
Replies
2
Views
872
Sep 5, 2024
Mooseman
SMELL OF GAS AFTER DRIVING 2005 4.2L 6
Petnatcar
Aug 20, 2024
Replies
9
Views
1K
Aug 28, 2024
Mooseman
S
repair TCC valve or HPtuners?
santon
Aug 27, 2024
Replies
1
Views
601
Aug 27, 2024
Mooseman
G
NEED HELP
4.2 cylinder sleeve replacement
Gfmdesign
Nov 12, 2023
2
Replies
44
Views
6K
Aug 22, 2024
mrrsm
S
PO442
Stuntmanmike1977
May 1, 2024
2
3
4
5
6
Replies
204
Views
12K
Aug 21, 2024
Stuntmanmike1977
S
T
SOLVED!
P0016 Maybe VVT Gear Malfunctioning????
TheOneBlazer
Jul 5, 2024
Replies
27
Views
3K
Aug 21, 2024
TheOneBlazer
T
C
Fuse box removal..what is next step?.
c good
Aug 14, 2024
Replies
3
Views
642
Aug 17, 2024
Camdo
C
C
May have found part of my electrical gremlins.
c good
Aug 13, 2024
Replies
3
Views
455
Aug 14, 2024
c good
C
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