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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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S
SOLVED!
So begins my P0171 journey.
sashainwy
May 2, 2023
Replies
6
Views
783
Jun 13, 2023
sashainwy
S
S
Fuel pump access panel
Stuntmanmike1977
May 4, 2023
Replies
10
Views
2K
May 5, 2023
Stuntmanmike1977
S
S
old radiator cap leaks, replaced, new one leaks occasionally
sashainwy
May 6, 2023
Replies
12
Views
2K
Dec 7, 2023
sashainwy
S
O2 Sensor little to no voltage Bank 1 Sensor 1
jmonica
Jun 17, 2023
Replies
5
Views
1K
Jul 1, 2023
jmonica
S
NEED HELP
02 Envoy cooling issues
Scooter72
Jun 20, 2023
Replies
7
Views
783
Jun 27, 2023
Scooter72
S
Coolant pouring out of reservoir when trying to fill
jmonica
Jun 24, 2023
Replies
3
Views
397
Jun 25, 2023
Blckshdw
Call for help PLEASE Any other stuck O2 Sensor Suggestions?
jmonica
Jun 25, 2023
Replies
10
Views
771
Jun 28, 2023
gmcman
NEED HELP
Oil Pressure guage drops to zero (sometimes) during idle
stvrob
Jun 26, 2023
Replies
5
Views
624
Jun 27, 2023
TJBaker57
I
Is my engine knocking?
imjustauser
Jun 28, 2023
Replies
20
Views
1K
Jul 15, 2023
Aroc
S
NEED HELP
difference between a 2005 4.2l and a 2006 4.2l short block
shuby63
Jul 12, 2023
Replies
2
Views
599
Jul 12, 2023
Mooseman
S
blend door actuator malfunction
sweettsinger
Jul 14, 2023
Replies
2
Views
573
Jul 14, 2023
Mooseman
Stuff on the Screens
Daniel644
Jul 30, 2023
Replies
10
Views
734
Aug 2, 2023
Daniel644
P0135
JayArr
Aug 13, 2023
Replies
29
Views
1K
May 7, 2024
JayArr
Weird Cooling problem
JayArr
Aug 18, 2023
Replies
30
Views
1K
Sep 3, 2023
JayArr
A
NEED HELP
Manually Adjust Transfer Case Position?
AC75TB07
Aug 19, 2023
Replies
21
Views
2K
Aug 22, 2023
AC75TB07
A
A
NEED HELP
Belt Tensioner?
AC75TB07
Aug 19, 2023
Replies
14
Views
996
Nov 8, 2023
Realism
E
2005 Envoy Cranks will not start.
Envoywarrior
Aug 28, 2023
Replies
5
Views
503
Aug 29, 2023
Envoywarrior
E
SOLVED!
replacement cat
jak03TB
Aug 31, 2023
Replies
20
Views
1K
Nov 8, 2023
Realism
S
2005 TB 4.2L engine noise
santon
Sep 1, 2023
Replies
10
Views
946
Mar 10, 2024
azswiss
K
Which way do the main bearings go on 4.2?
KWG2005
Sep 6, 2023
Replies
25
Views
1K
Sep 10, 2023
mrrsm
A
NEED HELP
Clean Throttle & MAF Sensor... Still Rough at Idle...
AC75TB07
Sep 21, 2023
Replies
8
Views
726
Sep 22, 2023
mrrsm
T
NEED HELP
After putting in new rebuild 4.2 Envoy can't get it to start up.
Tboy4u2nv
Oct 20, 2023
Replies
7
Views
599
Oct 24, 2023
azswiss
Help diagnosing an engine rattle?
Shdwdrgn
Oct 21, 2023
Replies
13
Views
700
Nov 13, 2023
Shdwdrgn
NEED HELP
Looking for info on testing COP, good ohm range
Drec
Oct 25, 2023
Replies
1
Views
342
Oct 25, 2023
TJBaker57
P0325 - Which knock sensor is the culprit?
Mike534x
Oct 31, 2023
Replies
25
Views
1K
Nov 18, 2023
Mike534x
2005 4.2 P0455 Code
Petnatcar
Nov 3, 2023
Replies
13
Views
853
Nov 14, 2023
Petnatcar
FIXED. Random P0300 misfire gremlin
Realism
Nov 7, 2023
Replies
9
Views
671
Nov 8, 2023
Realism
G
NEED HELP
4.2 cylinder sleeve replacement
Gfmdesign
Nov 12, 2023
2
Replies
40
Views
2K
Mar 19, 2024
mrrsm
B
Lost compression cylinder four
boredwild
Nov 19, 2023
Replies
5
Views
689
Dec 1, 2023
boredwild
B
J
SOLVED!
Alternator not charging
joe mama
Nov 22, 2023
Replies
3
Views
590
Nov 24, 2023
joe mama
J
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Engine & Drivetrain
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