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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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OEM Thermostat Temperature
Yesterday at 8:07 PM
Mike534x
Drivetrain
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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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H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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Your feedback on temp while towing.
ClicksCrazy
Aug 16, 2017
Replies
13
Views
1K
Aug 20, 2017
ClicksCrazy
C
Yellow Dip Stick Dilemma
c good
Oct 13, 2022
Replies
6
Views
746
Oct 16, 2022
c good
C
Year long battle is finally over...
Boricua SS
Jul 18, 2013
Replies
28
Views
2K
Jul 20, 2013
Boricua SS
X66P Upper Engine & F.I. Cleaner (88861803)
rizzo20
Mar 29, 2017
Replies
9
Views
6K
Jun 24, 2017
seanpooh
M
Wrenching Help in Thornton/Westminster/Denver area?
miznitic
Feb 1, 2015
Replies
6
Views
1K
Sep 22, 2015
miznitic
M
C
Would you put in a new Fuel Pump if it's never been replaced at 190 K miles?
c good
Oct 2, 2022
Replies
5
Views
665
Oct 5, 2022
gmcman
Would I feel any difference with a K & N air filter !!!!!!
Malo
Jan 17, 2014
2
Replies
43
Views
3K
Feb 26, 2014
blazinlow89
H
Would a certified GM shop do this???
h-m
Feb 25, 2014
Replies
29
Views
2K
Jun 30, 2014
dmanns67
C
Worth picking up an extra engine?
c good
Feb 3, 2024
Replies
6
Views
395
Feb 9, 2024
c good
C
Worn u joints methinks
Magyver
Jul 20, 2014
Replies
14
Views
2K
Sep 28, 2014
Up And Down
U
L
wont start when it rains
larry Dean
Feb 22, 2018
Replies
4
Views
1K
Feb 23, 2018
shovenose
Won't start again after being run
DenaliHD66
Sep 21, 2013
Replies
5
Views
853
Sep 21, 2013
gmcman
Won't Start
Johnb868
Sep 19, 2019
Replies
2
Views
1K
Sep 20, 2019
Mooseman
Will the dual port muffler from an H3 work in my trailblazer?
WeaponX
Aug 29, 2019
Replies
1
Views
508
Aug 29, 2019
HARDTRAILZ
J
Wierd vibration at 60-70 mph
jme2712
Sep 4, 2013
Replies
5
Views
1K
Dec 7, 2013
jigubhai2001
J
Why change synthetic oil every 3,000 miles?
C-ya
Nov 1, 2012
2
Replies
64
Views
6K
Feb 14, 2013
Sparky
Whirring buzz from under the hood, take a guess
Realism
Jan 13, 2024
Replies
12
Views
595
Feb 5, 2024
Realism
P
Whining noise, slow acceleration, MPG's getting worse. What to do next?
POW
Aug 17, 2015
Replies
14
Views
3K
Sep 20, 2015
POW
P
Whine/Squeal consistent with RPM change (Revisited thread see last post)
PProph
Feb 13, 2012
Replies
32
Views
4K
Jun 14, 2016
PProph
Which spark plugs do we like again?
6716
Feb 22, 2020
Replies
7
Views
1K
Apr 2, 2020
mrrsm
D
Which ODBII transmission temp
dougman
Jun 13, 2012
Replies
14
Views
2K
Jun 14, 2012
dougman
D
2
Which Mobil 1 Oil to Choose
2840Ryan
Dec 18, 2011
Replies
13
Views
2K
Feb 12, 2012
Mark20
K
Which LSD?
kmanz1
Mar 10, 2013
Replies
15
Views
2K
Apr 23, 2013
Metsämies
I
Which hub?
Instrumental
Apr 18, 2013
Replies
11
Views
1K
Apr 20, 2013
Instrumental
I
Where to purchase fan clutch
gmcman
Feb 28, 2013
Replies
28
Views
2K
Mar 21, 2013
DFWWIZ
T
Where to get info on Test IDs and Component IDs?
TonyT
Oct 11, 2012
Replies
0
Views
3K
Oct 11, 2012
TonyT
T
Where to find ignition coil harness for 2005 TB 6 cyl
Charles Austin Miller
Jul 4, 2018
Replies
4
Views
669
Jul 4, 2018
Charles Austin Miller
D
where is the Idle air control valve on 04 envoy
dazingla
Aug 22, 2013
Replies
6
Views
8K
Aug 23, 2013
gmcman
Where is the fuel pressure regulator on an 05 I6?
WeaponX
Nov 16, 2019
Replies
9
Views
2K
Nov 25, 2019
paul2005tb
J
Where is neutral?
jaguarjoe
Dec 16, 2012
Replies
10
Views
2K
Jul 8, 2013
Irishboy02
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