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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
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PO442
Yesterday at 1:42 PM
Stuntmanmike1977
Drivetrain
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13.3K
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1.1K
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13.3K
Re-using Torque converters
Tuesday at 10:44 AM
JayArr
Vortec 5.3L V8
New
394
5.2K
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394
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5.2K
M
Runs rough couple miles after starting
Today at 10:43 AM
MD_Envoy_Driver
LS2 6.0L V8
40
839
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40
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839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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NEED HELP
saab97x5.3i Where are the rust spots on the transmission tubes?
Sprung Monkey
Aug 14, 2020
Replies
11
Views
1K
Aug 29, 2020
gmcman
4WD Disconnect Advice
psa55
Aug 7, 2020
Replies
10
Views
3K
Aug 23, 2020
BrianF
B
G
Supercharger kit?!
GreenMachineTB
Aug 22, 2020
Replies
2
Views
834
Aug 23, 2020
gmcman
High output alternator for the 4.2L
gmcman
Aug 19, 2020
Replies
7
Views
1K
Aug 20, 2020
gmcman
Pre-Oil Change
psa55
Aug 17, 2020
Replies
12
Views
2K
Aug 20, 2020
psa55
J
Dipstick Readings Very Erratic
Jkb242
Aug 12, 2020
Replies
11
Views
1K
Aug 15, 2020
Jkb242
J
N
Engine mount heat shield
NJTB
Aug 11, 2020
Replies
3
Views
1K
Aug 12, 2020
NJTB
N
E
Low oil pressure with P0014 and P0016
emedlin
Jul 12, 2020
Replies
23
Views
8K
Aug 6, 2020
gmcman
W
Help with engine noise, video included
wormwood1978
May 1, 2019
Replies
12
Views
2K
Jul 28, 2020
wormwood1978
W
Test for mis-matched axle ratio
TJBaker57
Jul 24, 2020
Replies
2
Views
655
Jul 27, 2020
TJBaker57
Big 3 Wiring Upgrade & High output alternator
NODAYSOFF
Jul 20, 2020
Replies
9
Views
2K
Jul 23, 2020
xavierny25
D
rear end clunks
davidaward47
Jul 12, 2020
Replies
3
Views
746
Jul 16, 2020
davidaward47
D
K
Envoy inline 4.2 aux fan help
Kylek
Jul 5, 2020
Replies
4
Views
994
Jul 7, 2020
Mooseman
M
Cam Position Sensor p0340
Mektek
Jun 25, 2020
Replies
3
Views
804
Jun 29, 2020
Mektek
M
G
Engine run-on
Gmtb03
Jun 27, 2020
Replies
8
Views
1K
Jun 29, 2020
Gmtb03
G
P0107 P0122 P0223
6716
Jun 27, 2020
Replies
0
Views
725
Jun 27, 2020
6716
J
Trailblazer crank no start
John1969
Jun 5, 2020
Replies
27
Views
3K
Jun 10, 2020
TollKeeper
O
Cranks but no start, CEL light and reduced power light
OMGTB
May 26, 2020
Replies
3
Views
1K
Jun 10, 2020
gmcman
Starter not staying energized
gmcman
Jun 7, 2020
Replies
12
Views
1K
Jun 10, 2020
gmcman
Transmission works again after shutting engine off
BanditGTP
Feb 19, 2020
Replies
29
Views
5K
Jun 1, 2020
Mooseman
M
Servo snap ring from hell
MBS1994
May 23, 2020
Replies
8
Views
1K
May 24, 2020
MBS1994
M
Saab 97x 5.3i V8 slight rev RPM around 30mph-60mph
WickedHysteria
May 23, 2020
Replies
6
Views
1K
May 23, 2020
Mooseman
NEED HELP
2006 chevy trailblazer relearn
ayalamarcus5223
Apr 25, 2020
Replies
10
Views
2K
Apr 27, 2020
Cthornburg1972
C
R
NEED HELP
Annoying chirp under hood
richphotos
Apr 19, 2020
Replies
19
Views
3K
Apr 25, 2020
richphotos
R
C
Noise from engine compartment, need help diagnosing
CakeBlazer
Jan 22, 2020
Replies
9
Views
1K
Apr 14, 2020
TollKeeper
B
4WD Service Light - C0379 Code
Budmiester
Jan 15, 2012
Replies
10
Views
39K
Apr 14, 2020
MaxiVI
M
S
Ignition switch .. again, this time with failure while driving !!
SSportWagon
Aug 14, 2015
Replies
11
Views
2K
Apr 10, 2020
TB_n00b
T
Voltage drop when I come off the throttle
6716
Feb 24, 2020
Replies
9
Views
5K
Apr 6, 2020
MRB455
Which spark plugs do we like again?
6716
Feb 22, 2020
Replies
7
Views
1K
Apr 2, 2020
mrrsm
No Forward or Reverse. Transmission Toast?
BanditGTP
Mar 30, 2020
Replies
8
Views
1K
Apr 1, 2020
Reprise
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