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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
New
2.5K
38.9K
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2.5K
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38.9K
R
Only 3000 miles on oil, but One year old. Change filter too?
Tuesday at 4:41 PM
Redbeard
Drivetrain
New
1.1K
13.3K
Threads
1.1K
Posts
13.3K
NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
New
393
5.2K
Threads
393
Posts
5.2K
Rate this Used Airfilter
Tuesday at 12:20 PM
christo829
LS2 6.0L V8
40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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H
Front Driveshaft Removal to bypass A4wd
hullman8
Oct 10, 2013
Replies
14
Views
10K
Oct 11, 2013
hullman8
H
M
Oil Pressure Gage
Mektek
Jul 1, 2019
2
Replies
59
Views
10K
Sep 3, 2021
gmcman
Clarification on Front & Rear Differential Lubes
DgTerrell
May 29, 2012
Replies
17
Views
10K
Dec 22, 2012
Fire06
F
Straight 6 vs v8 trailblazer EXT
Ghost
Jan 3, 2013
Replies
14
Views
9K
Oct 24, 2018
limequat
I give up.....broken bolts in engine block
Voymom
May 10, 2012
Replies
21
Views
9K
May 14, 2012
Voymom
T
Motor Oil Spilled on Serpentine Belt
TequilaWarrior
Oct 14, 2019
Replies
8
Views
9K
Oct 15, 2019
TequilaWarrior
T
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
Has anyone thought about converting a TB/Envoy to a manual or stick
Drec
Apr 29, 2018
Replies
25
Views
9K
Jan 8, 2020
HARDTRAILZ
Bad gas cap or Purge Solenoid?
Mike534x
Apr 15, 2017
Replies
23
Views
9K
May 1, 2017
Mike534x
Grinding noise a specific RPM
ghost_leader07
Sep 2, 2020
Replies
16
Views
9K
Sep 4, 2020
gmcman
F
How much play in crankshaft and rod bearings is too much?
fferd
Oct 19, 2012
Replies
2
Views
9K
Oct 20, 2012
fferd
F
Torque App
C-ya
Sep 4, 2012
Replies
9
Views
8K
Sep 24, 2012
C-ya
D
2002 Bravada/Envoy/Trailblazer muffler DIY replacement
darsch
Apr 1, 2014
Replies
5
Views
8K
Jan 9, 2015
darsch
D
N
Novice Attempting TC & Disconnect Service, Help?
NotAMechanic
Nov 1, 2018
2
Replies
76
Views
8K
Jan 3, 2022
NotAMechanic
N
Coolant flow direction?
RyanEAS
Jul 21, 2016
Replies
5
Views
8K
Sep 20, 2020
Mooseman
D
where is the Idle air control valve on 04 envoy
dazingla
Aug 22, 2013
Replies
6
Views
8K
Aug 23, 2013
gmcman
MPG.. OUCH!
Gump2773
Feb 22, 2012
2
3
Replies
100
Views
8K
Mar 28, 2012
tcjack
T
N
2006 envoy denali shifting hards with no slipping
N.SHIFT
Mar 31, 2014
Replies
10
Views
8K
Apr 30, 2014
misterhyde
M
E
Low oil pressure with P0014 and P0016
emedlin
Jul 12, 2020
Replies
23
Views
8K
Aug 6, 2020
gmcman
Replace 4l60e with 4l70e?
DenaliHD66
Jun 7, 2012
Replies
13
Views
8K
Jun 8, 2012
ScarabEpic22
C
Tracking misfires -Torque Pro
candem
Oct 15, 2019
Replies
7
Views
8K
Oct 16, 2019
Kelly@PCMofNC
M
PCMforless Tax Time Sale!!!
marshall@pcm
Feb 9, 2012
2
3
Replies
94
Views
8K
Apr 7, 2012
Ace1875
V
Having trouble to diagnose DTC P1484 Not the EV Fan, PCM???
vcarlos40
Apr 9, 2013
Replies
23
Views
8K
Aug 2, 2014
vcarlos40
V
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
4L60e.... To flush or not to flush?
zaid3ssaf
Sep 26, 2020
Replies
19
Views
8K
May 24, 2023
zaid3ssaf
K
2004 Envoy SLT Code P0016
kmanz1
Jul 5, 2018
Replies
6
Views
8K
Jul 14, 2018
Mooseman
G
removal and adjustment ParkNeutralPosition safety switch
greggraves
Mar 30, 2014
Replies
33
Views
8K
Jul 5, 2014
Saul
S
S
Engine swap for 07 saab97x 5.3i need advice on used engine please
Sprung Monkey
Oct 4, 2021
2
3
Replies
86
Views
8K
Aug 15, 2022
TollKeeper
clicking sound near fan clutch
gkrenzer
Apr 7, 2012
Replies
7
Views
8K
Aug 23, 2012
n0kfb
NEED HELP
P0171 on my 04 Trailblazer LT won't go away
ghost_leader07
Sep 24, 2021
2
3
Replies
117
Views
8K
Nov 6, 2023
mrrsm
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