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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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OEM Thermostat Temperature
Yesterday at 8:07 PM
Mike534x
Drivetrain
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13.3K
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NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
392
5.2K
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392
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5.2K
Catalytic converter replacement options EPA vs carb
Feb 18, 2024
Mike534x
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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P
Where did the oil go?
pell
Jun 11, 2023
Replies
11
Views
592
Jun 17, 2023
Mooseman
T
Where did GM Hide the 05-on Fuel Pressure regulator on the Trailblazers?
Tmn8tr
Aug 6, 2013
Replies
4
Views
1K
Aug 7, 2013
BRomanJr
B
Where can I get the TCC PWM eliminator kit?
gmcman
Oct 29, 2023
Replies
3
Views
464
Oct 30, 2023
Sparky
C
Whenever i switch to "A4WD" on my 4x4 selector(even for a split second), my "service Four Wheel Drive" light comes on?
Corpsicle
Jan 10, 2018
Replies
2
Views
1K
Jan 12, 2018
Corpsicle
C
When Did Your Fuel Pump Fail (or has it yet)??
Bartonmd
Jul 9, 2014
Replies
23
Views
2K
Sep 5, 2014
Texan
G
when and how to shift into first when towing up a mountain
greggraves
Apr 16, 2014
Replies
11
Views
1K
Apr 17, 2014
IllogicTC
Wheel hop front right when in 4x4
GregT
Jan 21, 2012
Replies
2
Views
1K
Jan 21, 2012
GregT
D
Wheel Bearing, front, Trailblazer LS 4x4, it must be going bad
dmtaurus
Sep 2, 2012
Replies
15
Views
8K
Sep 9, 2012
JerryIrons
J
I
Wheel Bearing R&R
Instrumental
Mar 13, 2017
Replies
9
Views
1K
Apr 27, 2017
JimInRadfordVA
K
wheel bearing noise
kenzoil
Mar 21, 2014
Replies
33
Views
3K
Apr 16, 2014
kickass audio
K
Wheel bearing hub assembly
Dmflash
Mar 8, 2023
2
Replies
68
Views
4K
Nov 28, 2023
far eastan
F
What's wrong with this picture?
northcreek
May 4, 2019
Replies
7
Views
1K
May 8, 2019
TollKeeper
S
What's the value of used 4.2 engine?
SeeksTB
Apr 27, 2017
Replies
6
Views
955
May 23, 2017
thebat
T
B
What's that noise ..
bastenblood
Apr 30, 2012
Replies
11
Views
2K
Apr 30, 2012
03envoy
What year TB 4L60Es are compatible with each other?
SpeedUp
Sep 25, 2018
Replies
17
Views
5K
Sep 29, 2018
Mooseman
J
What would you do? Fix it or scrap it and buy something new
jessiewebster
Dec 7, 2015
Replies
11
Views
2K
Dec 8, 2015
DESSKI
S
What type of rear end fuild for 07 97x
Sprung Monkey
Mar 30, 2018
Replies
10
Views
1K
Mar 31, 2018
Mooseman
what tune should I get?
Canary2323
Jun 18, 2013
Replies
8
Views
1K
Jun 21, 2013
dmanns67
R
What Transmission do I have ?
Rod10744
Aug 23, 2015
Replies
8
Views
1K
Aug 23, 2015
Sparky
What Sensor/Connector is This?
Maverick6587
Feb 28, 2019
Replies
2
Views
707
Feb 28, 2019
Maverick6587
J
What is your oil pressure??
jd8181
Apr 3, 2012
Replies
14
Views
4K
Apr 5, 2012
davenay67
What is this sensor for??
WeaponX
Nov 18, 2019
Replies
2
Views
745
Nov 18, 2019
seanpooh
What is this hose for???
D3vious
Nov 21, 2014
Replies
4
Views
1K
Nov 21, 2014
D3vious
What is this any why is it leaking?
WeaponX
Apr 27, 2019
Replies
2
Views
699
Apr 28, 2019
Mooseman
What is the torque side of the I6
smt 59
Dec 16, 2018
Replies
7
Views
972
Dec 19, 2018
mrrsm
What is the aft-most seal/gasket holding in ATF?
6716
Apr 30, 2013
Replies
3
Views
1K
May 1, 2013
mrphoenix80
M
What happens if you overfill your engine oil?
flyboy2610
Apr 13, 2024
Replies
4
Views
123
Sunday at 11:03 AM
flyboy2610
what happens if I overfill tree he 4l60e?
6716
Mar 30, 2019
Replies
3
Views
11K
Apr 1, 2019
6716
A
What exhaust makes the 4.2 sound more like the 6.0
andy702252
Jan 31, 2012
2
Replies
46
Views
9K
Sep 17, 2021
CptFrito
C
A
What does changing t-stats do
andy702252
Jan 31, 2012
Replies
3
Views
1K
Feb 8, 2012
KNBlazer
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