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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
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PO442
Today at 8:19 AM
Mooseman
Drivetrain
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Crimping new trans cooler lines
14 minutes ago
JayArr
Vortec 5.3L V8
New
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5.2K
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394
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0
Runs rough couple miles after starting
May 10, 2024
04envoyxlv8
LS2 6.0L V8
40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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NEED HELP
Speaker feedback
Traz
Jan 1, 2019
Replies
8
Views
973
Jan 7, 2019
Traz
D
SOLVED!
Sparkplugs issue no code
Dreccomel
Apr 6, 2019
Replies
8
Views
1K
Apr 27, 2019
Mooseman
S
Spark plug torque
slamfire
May 8, 2013
Replies
20
Views
25K
May 9, 2013
seanpooh
R
Spark plug change and maintenance
rlc3854
Jun 8, 2013
Replies
6
Views
1K
Jun 10, 2013
imotto
I
M
Spark plug 7 oil fowled
MBS1994
Feb 16, 2020
Replies
11
Views
2K
Feb 20, 2020
MBS1994
M
M
Sounds like starter motor
mlan12
Aug 12, 2016
Replies
7
Views
941
Aug 19, 2016
C-ya
Son of a P1682
TexazReece
Sep 5, 2013
Replies
4
Views
912
Sep 7, 2013
djthumper
SOMETHING Just blew...
DenaliHD66
Jun 24, 2013
2
3
Replies
116
Views
7K
Aug 19, 2013
DenaliHD66
M
Something bad happened - Sunshell?
MichEnvoyGuy
Oct 6, 2013
Replies
33
Views
13K
Nov 5, 2013
triz
SOLVED: The Case of the Never Ending Misfire
therealsethallen
Dec 7, 2015
Replies
23
Views
5K
Dec 17, 2015
therealsethallen
Solved - Noise while on accelerator - no noise when coasting
Chris E
May 6, 2016
Replies
22
Views
6K
Jan 16, 2017
Chris E
So, did I dodge a bullet? (front diff)
Reprise
Jan 2, 2022
Replies
11
Views
1K
Jan 5, 2022
Reprise
So my Exhaust fell off today... (pics)
DenaliHD66
Sep 12, 2012
Replies
21
Views
3K
Apr 5, 2014
DDonnie
J
Small misfire only when cold start
Jon Blaze
Dec 14, 2014
Replies
1
Views
1K
May 10, 2015
bigjerel
B
H
slight rough idle
htseat2000
Aug 14, 2017
Replies
10
Views
4K
Sep 20, 2017
Mooseman
S
Slight hesitation/vibration at idle
seadoojetski
Dec 5, 2023
Replies
10
Views
523
Dec 9, 2023
mrrsm
H
Signal wire shows 12 volts... ignition off
halfawhole again
Jul 27, 2023
Replies
6
Views
627
Jul 28, 2023
TJBaker57
T
Shutters Stalls in Reverse
Tmac7600
Dec 6, 2014
Replies
5
Views
1K
Dec 6, 2014
The_Roadie
Shudder in park, check gauges light
BlazinIdeas
Jul 29, 2015
Replies
12
Views
1K
Sep 2, 2015
BlazinIdeas
Shimmy Shake at 75mph
CRAZYDAVE
Jul 23, 2012
Replies
10
Views
2K
Oct 26, 2012
camper1
NEED HELP
Shifter locked in neutral
Drec
Jul 28, 2022
Replies
14
Views
1K
Aug 2, 2022
Drec
L
Shifter has play/not clicking when in gear
ll6
Sep 26, 2020
Replies
3
Views
2K
Sep 30, 2020
mrrsm
T
Severe Miss after driving through water - possibly plugged cat?
TequilaWarrior
Jun 21, 2019
Replies
5
Views
572
Jun 21, 2019
Blckshdw
Several Problem Codes!
MrDJ
Mar 14, 2012
Replies
4
Views
2K
Mar 14, 2012
MrDJ
SES Light P0420 - Need help diagnosing / replacement
mubai
Aug 8, 2012
Replies
8
Views
2K
Aug 9, 2012
MAY03LT
M
Servo snap ring from hell
MBS1994
May 23, 2020
Replies
8
Views
1K
May 24, 2020
MBS1994
M
B
Servo Question..
buster04
Dec 29, 2012
Replies
1
Views
882
Dec 30, 2012
Black LT
Service Engine Light
smt 59
Jun 29, 2018
Replies
11
Views
965
Jul 1, 2018
smt 59
Service Engine and Reduce Engine Power lights
hawkeye405
Jan 30, 2017
Replies
27
Views
6K
Feb 19, 2017
hawkeye405
G
NEED HELP
Service Brakes, tranny slipping, spedo jumping, A/C drive hot:pass cold! No problem lights!?
GoldRainier
Aug 31, 2019
Replies
12
Views
1K
Sep 25, 2019
GoldRainier
G
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