Vortec 4.2L I-6

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Mooseman
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FAQ: Vortec 4.2L I-6
Replies
1
Views
16K
Mooseman
Mooseman
Mooseman
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4.2L (LL8) DTC Engine Diagnostic Parameters
Replies
3
Views
6K
TJBaker57
TJBaker57

Normal threads

smitty5150
Maximizing 4.2 performance
Replies
28
Views
86K
Capote
Capote
jbacklund
Running rich, negative long term fuel trim
Replies
11
Views
64K
jbacklund
jbacklund
gmcman
What size threads or adapter to check oil pressure at sending unit
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20
Views
59K
limequat
limequat
L
Rpm revving up and down while driving around 50-60mph.
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26
Views
58K
6716
6716
ConeKilrAutoX
4.2 Envoy Turbo Build
Replies
663
Views
57K
ConeKilrAutoX
ConeKilrAutoX
groundshock
4.2 to 5.3 Engine Swap Talk
Replies
77
Views
54K
mrrsm
mrrsm
mrrsm
The $85,000.00 GM 4.2L Engine Repair
Replies
189
Views
50K
03TrailblazerNut
0
F
Envoy with dreaded rough idle, no codes, UPDATE FIXED!
Replies
24
Views
48K
gmcman
gmcman
Aukland
Vibrations when sitting in drive
Replies
45
Views
47K
paulcmartin
paulcmartin
Mrs Homer
Engine light with down arrow
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13
Views
44K
sevendj
S
m.mcmillen
4.2 Engine Rebuild
Replies
91
Views
43K
mrrsm
mrrsm
Blckshdw
Rough idle and misfiring, but no codes
Replies
43
Views
43K
Dillyo82
Dillyo82
M
GMC Envoy 2003 Engine Shake and Rough Idle.
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7
Views
43K
Cooztwo
C
SBUBandit
Removing Secondary Air Injection System
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90
Views
40K
Mooseman
Mooseman
M
WTF! Both gas tank strap bolt spins.....
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24
Views
40K
Lrndthehardway
L
D
Valve cover gasket replacement on 4.2L
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7
Views
39K
hotwheeler69
hotwheeler69
LOWCLASS21
The dreaded P0017 CODE... Help me pleeeease !
Replies
17
Views
38K
bobdec
B
D
Cranks but won't start
Replies
265
Views
38K
Mooseman
Mooseman
David11946
4.2L vacuum line diagram?
Replies
9
Views
35K
TequilaWarrior
T
L
No oil pressure at idle
Replies
32
Views
35K
Mooseman
Mooseman
R
Timing chain tensioner gone bad?
Replies
45
Views
35K
AbsoluteZero
A
gmcman
Dreaded knock sound is starting
Replies
72
Views
33K
gmac310
gmac310
Inert_Static
Stabilitrack and stabilitrack service light.
Replies
20
Views
33K
mrrsm
mrrsm
pcharm129
Only getting 160 miles on 25gal tank
Replies
471
Views
32K
pcharm129
pcharm129
trailblazer075
Why you may need to clean a 4.2L I6 Throttle Body
Replies
41
Views
32K
bLAzen03
bLAzen03
K
yet another lovely 4.2l valve tick
Replies
56
Views
31K
mrrsm
mrrsm
Vicompc
4.2 oil consumption
Replies
46
Views
31K
Vicompc
Vicompc
Capote
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<FIXED> Lifter noise & dull knocking (bottom end?) troubleshooting
Replies
97
Views
30K
Capote
Capote
C
Engine running hot, clutch fan not engaging
Replies
19
Views
29K
KNBlazer
KNBlazer
khill
The case of the mysterious misfire...
Replies
47
Views
28K
fadyasha
fadyasha
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