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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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What you guys think of this Kooks Exhaust Header?
DIY Fixer
Jan 31, 2016
2
Replies
42
Views
7K
May 17, 2016
therealsethallen
What years are interchangeable on the I6 4.2 engine?
Gearheadvr4
Aug 25, 2015
Replies
7
Views
14K
Aug 26, 2015
Tiggerr
what year engine(s)
Flyersguy
May 13, 2012
Replies
12
Views
2K
May 14, 2012
Flyersguy
J
What year 4.2 engines are direct replacement
Jrp79
Jun 11, 2019
Replies
16
Views
4K
Sep 8, 2019
Mooseman
B
What would be causing this?
blackout51
Jan 5, 2013
Replies
5
Views
1K
Jan 6, 2013
CaptainXL
C
A
what will I have to do to use an 07 4.2 liter engine in my 05 trailblazer
avh07
Sep 19, 2018
Replies
2
Views
602
Sep 19, 2018
Mooseman
B
what trips the "STOP ENGINE" display?
bspurloc
Dec 14, 2014
Replies
31
Views
2K
Dec 19, 2014
bspurloc
B
What tool to compress valve springs
gmcman
May 3, 2014
Replies
14
Views
5K
Jan 10, 2024
mrrsm
What to wrap? If anything?
jmonica
Feb 20, 2020
Replies
3
Views
981
May 9, 2021
jmonica
1
what thermostat to use part 2
1987 mustang
Jun 1, 2013
Replies
5
Views
899
Jun 2, 2013
The_Roadie
1
what thermostat to use
1987 mustang
May 22, 2013
Replies
4
Views
1K
May 26, 2013
1987 mustang
1
What the heck is this?
seadeeare
Jan 26, 2013
Replies
6
Views
1K
Jan 27, 2013
seadeeare
What sort of heat rating does rubber trans cooler line have?
6716
Dec 3, 2014
Replies
4
Views
734
Dec 4, 2014
Mooseman
What size threads or adapter to check oil pressure at sending unit
gmcman
Apr 5, 2014
Replies
20
Views
59K
Jul 22, 2014
limequat
What Should I Replace at 175k
jeffro312
Nov 23, 2012
Replies
11
Views
1K
Nov 25, 2012
TollKeeper
R
What maintenance should I catch up with?
Revans381996
Dec 18, 2013
Replies
7
Views
1K
Dec 19, 2013
Revans381996
R
What long term damage with no installed PCM Fuse(s) cause, if any?
Lipstick-n-Lugs
Dec 9, 2018
Replies
6
Views
3K
Dec 10, 2018
limequat
Poll
What kind of MPG do y'all get?
RyanEAS
Jan 19, 2018
Replies
15
Views
1K
Jan 24, 2018
littleblazer
B
What is this rear rotted beam for? and spare repair?
bspurloc
Sep 7, 2014
Replies
24
Views
2K
Sep 9, 2014
bspurloc
B
What is this plug
Buloushie
Jan 22, 2018
Replies
12
Views
2K
Nov 15, 2018
cace68
C
T
what is this part
thebat
Oct 14, 2020
Replies
8
Views
2K
Feb 23, 2021
Gunner
G
0
What is this hose for?
04TrailblazerLT
Jul 30, 2015
Replies
5
Views
920
Jul 30, 2015
04TrailblazerLT
0
J
What is this connector near the AC compressor? (Plus oil pickup tube gasket fiasco.)
jcloninger
Jul 20, 2022
Replies
7
Views
1K
Jul 25, 2022
jcloninger
J
S
What is this connection? (top front of Intake Manifold)
SB_Pete
Nov 24, 2015
Replies
14
Views
21K
Nov 26, 2015
SB_Pete
S
B
what is this clip from?
bspurloc
Apr 12, 2015
Replies
10
Views
6K
Apr 14, 2015
bspurloc
B
B
What is the best way to test fuel injectors on our motor?
blackout51
Mar 10, 2013
Replies
17
Views
4K
Mar 13, 2013
CaptainXL
C
What is the AIR system?
Royalwapiti
Sep 8, 2014
Replies
13
Views
1K
Sep 28, 2014
HARDTRAILZ
B
What is stock exhaust size on the i6?
blackout51
Oct 21, 2012
Replies
16
Views
16K
Oct 23, 2012
Cable810
E
What is our redline?
ElAviator72
May 19, 2012
Replies
14
Views
6K
May 22, 2012
kardain
1
what is normal operating temperature
1987 mustang
Jun 2, 2013
Replies
6
Views
2K
Jun 2, 2013
The_Roadie
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Engine & Drivetrain
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