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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
7K
Nov 13, 2020
Mooseman
Sticky
4.2L (LL8) DTC Engine Diagnostic Parameters
Mooseman
Oct 7, 2019
Replies
3
Views
2K
Oct 7, 2019
TJBaker57
SOLVED!
Cooling system test results.
JayArr
Apr 2, 2021
Replies
6
Views
191
Thursday at 2:41 PM
JayArr
NEED HELP
02 EXT LT, P1860, P740, P753, P758, P785. Under-hood fuse #34 blown
Brando_TB
Nov 17, 2020
Replies
24
Views
757
Thursday at 4:07 AM
Brando_TB
D
Cranks but won't start
Dave347
Feb 18, 2014
2
3
4
5
Replies
174
Views
11K
Wednesday at 10:01 PM
Mooseman
F
2002 Envoy 4.2 engine noise need help!
francerichard
Wednesday at 8:41 AM
Replies
6
Views
93
Wednesday at 12:44 PM
francerichard
F
Alternator and Thermostat Replacement (How-to)
marinegrunt
Jan 17, 2015
Replies
12
Views
10K
Wednesday at 11:09 AM
JayArr
M
Injecteur TB 03
Mikequad
Monday at 2:25 PM
Replies
2
Views
80
Monday at 5:19 PM
Mooseman
Different "Limp Modes"
JayArr
Apr 3, 2021
Replies
3
Views
113
Apr 3, 2021
JayArr
T
Better fuel economy
Trekie47
Mar 28, 2021
Replies
18
Views
562
Apr 2, 2021
Reprise
R
P0455 followed by P0496
Robmoo
Mar 22, 2021
Replies
2
Views
137
Apr 1, 2021
Robmoo
R
J
P0014
Jdavis84
Mar 29, 2021
Replies
1
Views
108
Mar 30, 2021
Mooseman
How much oil pressure is enough?
TJBaker57
Mar 1, 2021
Replies
14
Views
473
Mar 29, 2021
Mooseman
M
Cruise control issues (am I in the right forum?)
Maverickxeo
Mar 28, 2021
Replies
10
Views
216
Mar 29, 2021
TJBaker57
New wheels 02 LTZ i6 trailblazer
JayBlazer02
Mar 20, 2021
Replies
1
Views
174
Mar 22, 2021
KEEBZ489
K
Stuck VVT solenoid.
TerryG
Mar 19, 2021
Replies
2
Views
184
Mar 20, 2021
TerryG
J
4x4 Help
jmabs509
Mar 14, 2021
Replies
0
Views
122
Mar 14, 2021
jmabs509
J
NEED HELP
P0171 Code causing high idle and poor fuel mileage!
ghost_leader07
Feb 27, 2021
Replies
21
Views
545
Mar 11, 2021
gmcman
N
oil pressure gauge
niceguypmp3
Feb 17, 2021
Replies
4
Views
241
Mar 7, 2021
rchalmers3
R
N
Intermittent starts, runs, then no starts no crank??
netbyte
Jan 24, 2021
Replies
16
Views
536
Feb 26, 2021
netbyte
N
T
what is this part
thebat
Oct 14, 2020
Replies
8
Views
675
Feb 23, 2021
Gunner
G
M
PS pump compatibility
Mektek
Feb 14, 2021
Replies
4
Views
271
Feb 17, 2021
Mektek
M
T
Stall issue
TBlazerD
Jan 27, 2021
Replies
15
Views
466
Feb 12, 2021
gmcman
C
Anyone know what size hex key is needed for the oil pressure test port?
chuey_316
Feb 8, 2021
Replies
2
Views
251
Feb 8, 2021
Reprise
SOLVED!
Noise Underneath & Rear
Nate8727
Jan 23, 2021
Replies
3
Views
358
Feb 6, 2021
Nate8727
NEED HELP
Wet Coil Pack on CL#06
ghost_leader07
Dec 31, 2020
Replies
18
Views
623
Feb 5, 2021
ThatOneWhiteTruck
T
R
LL8 Engine Test Platform Project
rchalmers3
Nov 28, 2020
Replies
27
Views
1K
Feb 4, 2021
limequat
S
P0171
steve-in-ga
May 16, 2014
Replies
20
Views
10K
Feb 3, 2021
LikeEnvoy
Y
NEED HELP
P0017 CPAS replaced. and still have the code
yazan
Feb 1, 2021
Replies
8
Views
342
Feb 3, 2021
Mooseman
4.2L vacuum line diagram?
David11946
Mar 3, 2013
Replies
4
Views
13K
Feb 3, 2021
Mooseman
N
Looking for Mechanic in Rochester, NY
nova72
Jan 13, 2021
Replies
13
Views
468
Jan 28, 2021
northcreek
Can I get more power from my 4.2?
JayArr
Aug 27, 2020
Replies
38
Views
1K
Jan 25, 2021
rchalmers3
R
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