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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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4.2L (LL8) DTC Engine Diagnostic Parameters
Mooseman
Oct 7, 2019
Replies
3
Views
6K
Oct 7, 2019
TJBaker57
Locked
Sticky
FAQ: Vortec 4.2L I-6
Mooseman
May 1, 2017
Replies
1
Views
16K
Nov 13, 2020
Mooseman
Normal threads
2002 TB running great
movietvet
Wednesday at 11:29 AM
Replies
0
Views
73
Wednesday at 11:29 AM
movietvet
C
OEM Thermostat Temperature
Camdo
Friday at 12:28 PM
Replies
10
Views
150
Friday at 8:07 PM
Mike534x
T
part number search: rubber plug for flexplate bolt access hole
tcell70
Jan 11, 2024
Replies
2
Views
169
Jan 12, 2024
mrrsm
S
Heat shield
Stuntmanmike1977
Feb 25, 2024
Replies
2
Views
241
Feb 26, 2024
Mooseman
C
Electric oil pressure gauge or true oil pressure gauge?
c good
Feb 5, 2024
Replies
3
Views
248
Feb 5, 2024
mrrsm
An Insurmountable Problem? Or Is There A Novel Way To Restrain The Timing Chain Against The Lower Crankshaft Cog?
mrrsm
Jan 3, 2024
Replies
1
Views
273
Jan 3, 2024
c good
C
C
Interesting 4.2 GM video
c good
Jan 21, 2024
Replies
0
Views
280
Jan 21, 2024
c good
C
NEED HELP
Looking for info on testing COP, good ohm range
Drec
Oct 25, 2023
Replies
1
Views
322
Oct 25, 2023
TJBaker57
O2 Sensor Recommendation please?
jmonica
Mar 10, 2024
Replies
8
Views
325
Mar 16, 2024
jmonica
W
4.2 xuv water pump and coolant
WookieeUK
Feb 15, 2024
Replies
7
Views
350
Feb 17, 2024
WookieeUK
W
Coolant pouring out of reservoir when trying to fill
jmonica
Jun 24, 2023
Replies
3
Views
381
Jun 25, 2023
Blckshdw
NEED HELP
VVT disassembly information needed.
cornchip
Mar 23, 2023
Replies
1
Views
402
Mar 24, 2023
mrrsm
J
4x4 Help
jmabs509
Mar 14, 2021
Replies
0
Views
450
Mar 14, 2021
jmabs509
J
E
2005 Envoy Cranks will not start.
Envoywarrior
Aug 28, 2023
Replies
5
Views
474
Aug 29, 2023
Envoywarrior
E
A
Crank shaft seal leaking
alexander8387
May 14, 2021
Replies
1
Views
478
May 14, 2021
aaserv
B
06 Saab 9-7X AC over pressure valve
Berns
Dec 7, 2017
Replies
2
Views
482
Dec 7, 2017
Berns
B
R
NEED HELP
Chamfer
Rockitt1964
Nov 22, 2020
Replies
1
Views
495
Nov 29, 2020
aaserv
2005 TB Sluggish Start ONLY After Gas Fill-Up
Charles Austin Miller
Nov 18, 2020
Replies
1
Views
508
Nov 18, 2020
BrianF
B
A
Envoy 06 4.2 ll8 engine swap, Donor Envoy 2008
Arth
Jul 2, 2019
Replies
1
Views
521
Jul 2, 2019
Mooseman
Car Stalls at the same place everyday only in mornings
Axel
Feb 26, 2023
Replies
0
Views
521
Feb 26, 2023
Axel
J
SOLVED!
Alternator not charging
joe mama
Nov 22, 2023
Replies
3
Views
529
Nov 24, 2023
joe mama
J
Difference in O2 sensors pre/post engine mods?
JayArr
Oct 20, 2018
Replies
1
Views
538
Oct 20, 2018
Mooseman
Multimeter voltage question at fuses
Elizabetty
Mar 11, 2023
Replies
8
Views
544
Mar 11, 2023
Mooseman
S
blend door actuator malfunction
sweettsinger
Jul 14, 2023
Replies
2
Views
545
Jul 14, 2023
Mooseman
Temp Higher than Usual?
shovenose
Jul 26, 2016
Replies
2
Views
545
Jul 27, 2016
Mooseman
T
Hard Start Followed by Shifting Problems
TrailBlaz05
May 11, 2021
Replies
0
Views
546
May 11, 2021
TrailBlaz05
T
R
2004 trailblazer no crank no start
Randall350
Jan 4, 2024
Replies
8
Views
550
Jan 16, 2024
Mooseman
S
Intermittent ABS light and RPM surge
S13Hitman
Sep 28, 2018
Replies
1
Views
552
Sep 28, 2018
Mooseman
R
Help with 4l60e wont do nothing
Robmartin
Apr 13, 2018
Replies
1
Views
554
Apr 13, 2018
Mooseman
S
NEED HELP
difference between a 2005 4.2l and a 2006 4.2l short block
shuby63
Jul 12, 2023
Replies
2
Views
557
Jul 12, 2023
Mooseman
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