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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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P0135
JayArr
Aug 13, 2023
Replies
23
Views
877
Sep 18, 2023
Mooseman
T
SOLVED!
4.2L LL8 Harmonic Balancer Removal/Installation
TopQuark
Sep 17, 2019
Replies
18
Views
9K
Sep 12, 2023
KWG2005
K
K
Which way do the main bearings go on 4.2?
KWG2005
Sep 6, 2023
Replies
25
Views
1K
Sep 10, 2023
mrrsm
S
There really are two front main seals?
Steevo
Apr 27, 2022
Replies
10
Views
3K
Sep 8, 2023
KWG2005
K
Weird Cooling problem
JayArr
Aug 18, 2023
Replies
30
Views
1K
Sep 3, 2023
JayArr
E
2005 Envoy Cranks will not start.
Envoywarrior
Aug 28, 2023
Replies
5
Views
444
Aug 29, 2023
Envoywarrior
E
S
HVAC Blend door actuator malfunction
sweettsinger
Nov 30, 2022
Replies
4
Views
1K
Aug 23, 2023
sweettsinger
S
A
NEED HELP
Manually Adjust Transfer Case Position?
AC75TB07
Aug 19, 2023
Replies
21
Views
2K
Aug 22, 2023
AC75TB07
A
J
4.2 timing chain
jener
Jul 31, 2016
Replies
31
Views
4K
Aug 8, 2023
mrrsm
S
Timing chain concern delaying cylinder head repair
selectah77
Feb 22, 2016
2
Replies
41
Views
4K
Aug 2, 2023
mrrsm
Stuff on the Screens
Daniel644
Jul 30, 2023
Replies
10
Views
663
Aug 2, 2023
Daniel644
W
2008 Trailblazer O2 Sensor Success, Rust Belt
wormwood1978
Aug 2, 2020
Replies
11
Views
1K
Jul 23, 2023
Brian K
B
I may have found the source of the misfire
6716
Apr 16, 2021
Replies
19
Views
3K
Jul 19, 2023
6716
I
Is my engine knocking?
imjustauser
Jun 28, 2023
Replies
20
Views
1K
Jul 15, 2023
Aroc
S
blend door actuator malfunction
sweettsinger
Jul 14, 2023
Replies
2
Views
530
Jul 14, 2023
Mooseman
S
NEED HELP
difference between a 2005 4.2l and a 2006 4.2l short block
shuby63
Jul 12, 2023
Replies
2
Views
512
Jul 12, 2023
Mooseman
O2 Sensor little to no voltage Bank 1 Sensor 1
jmonica
Jun 17, 2023
Replies
5
Views
1K
Jul 1, 2023
jmonica
Call for help PLEASE Any other stuck O2 Sensor Suggestions?
jmonica
Jun 25, 2023
Replies
10
Views
670
Jun 28, 2023
gmcman
S
NEED HELP
02 Envoy cooling issues
Scooter72
Jun 20, 2023
Replies
7
Views
713
Jun 27, 2023
Scooter72
S
Steering wheel theft deterrent lock burning hot
Elizabetty
Apr 1, 2023
Replies
11
Views
1K
Jun 27, 2023
RmbrNoel03EXT
R
NEED HELP
Oil Pressure guage drops to zero (sometimes) during idle
stvrob
Jun 26, 2023
Replies
5
Views
565
Jun 27, 2023
TJBaker57
Coolant pouring out of reservoir when trying to fill
jmonica
Jun 24, 2023
Replies
3
Views
371
Jun 25, 2023
Blckshdw
S
SOLVED!
So begins my P0171 journey.
sashainwy
May 2, 2023
Replies
6
Views
750
Jun 13, 2023
sashainwy
S
C
Baffles Required In New Oil Pan?
coh998
Apr 28, 2022
Replies
22
Views
2K
May 31, 2023
Mirror
Clunking noise on light acceleration
zaid3ssaf
Apr 15, 2021
Replies
7
Views
2K
May 24, 2023
zaid3ssaf
micro bubbles in my oil ???
02 green tb
Jan 9, 2012
Replies
8
Views
4K
May 9, 2023
mrrsm
Oil Gauge or Oil Pump or Gremlins?
Roamingdoc
Mar 9, 2023
Replies
12
Views
1K
May 7, 2023
ironring
I
P
NEED HELP
P0102 and P2101
pell
Apr 21, 2023
Replies
9
Views
735
May 7, 2023
pell
P
S
Fuel pump access panel
Stuntmanmike1977
May 4, 2023
Replies
10
Views
1K
May 5, 2023
Stuntmanmike1977
S
S
power steering fluid - valvoline maxlife atf ?
sashainwy
Feb 21, 2023
Replies
6
Views
2K
May 2, 2023
sashainwy
S
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