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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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R
Only 3000 miles on oil, but One year old. Change filter too?
Yesterday at 4:41 PM
Redbeard
Drivetrain
New
1.1K
13.3K
Threads
1.1K
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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
Yesterday 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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Problem With Transmission or Electrical Issue With Codes P0785 P1810 and P1860
Tiffany N Angel
Sep 24, 2017
Replies
17
Views
7K
Oct 10, 2017
Mooseman
M
Engine Removal Tips (4.2 i6)
miznitic
Sep 28, 2015
Replies
6
Views
7K
Oct 12, 2015
ChrisinVictoria
J
4.2 Head Gasket?
Justin_kyllo
Feb 19, 2014
Replies
33
Views
7K
Mar 28, 2014
0u812
0
D
Regular or synthetic oil what do you guys think
dazingla
Jul 25, 2013
Replies
30
Views
7K
Aug 15, 2013
HARDTRAILZ
S
misfire question and torque app driving me crazy
Stayathomedad
Feb 25, 2014
Replies
22
Views
7K
Apr 9, 2014
joeredspecial
J
S
Difficulty removing clutch fan
Sprung Monkey
Mar 15, 2021
2
Replies
48
Views
7K
Apr 13, 2021
Sprung Monkey
S
L
2002 Trailblazer getting increasingly worse gas mileage Please Help!
Lacher
Jul 6, 2014
Replies
11
Views
7K
Jan 25, 2015
fixnux
F
SOMETHING Just blew...
DenaliHD66
Jun 24, 2013
2
3
Replies
116
Views
7K
Aug 19, 2013
DenaliHD66
C
03 GMC Envoy 4.2L - Misfire- Replaced Spark Plugs now Engine knocking
coleash27
Dec 11, 2014
Replies
3
Views
7K
Dec 11, 2014
Mooseman
Anybody using Torque app for misfire?
AWD V8
Feb 18, 2015
Replies
5
Views
7K
Feb 25, 2015
AWD V8
S
trailblazer won't start after changing battery
spdeplayer2
Jul 12, 2015
Replies
21
Views
7K
Jul 16, 2015
BlazingTrails
S
Rough idle / Engine Dying and Low Oil Pressure Warning
StormPursuit
Sep 2, 2013
Replies
11
Views
7K
Sep 3, 2013
CaptainXL
C
Oil leak from the sensor above the oil filter?
WeaponX
Apr 11, 2019
Replies
9
Views
7K
Apr 14, 2019
mrrsm
0
2006 Envoy XL Denali Performance Mods ?
02tahoelt
May 10, 2012
Replies
9
Views
7K
May 13, 2012
91RS
9
P
Need help on replacing front differential on my 02 TB
prken
Jan 24, 2012
Replies
9
Views
7K
Jan 26, 2012
prken
P
SOLVED!
Intermittent metallic noise consistent with wheel speed
6716
Nov 30, 2019
Replies
8
Views
7K
Oct 2, 2020
6716
Is this the end?
Hatchet
Aug 18, 2013
2
3
Replies
92
Views
7K
May 27, 2014
nagyiii
Power choking
PProph
Apr 2, 2014
2
3
Replies
86
Views
7K
Aug 4, 2015
yonkster4g4
Trailblazer shuts off out of nowhere
MikeT
Oct 21, 2018
Replies
8
Views
7K
Nov 10, 2018
MikeT
Ngk plugs or ac delco ????? For a 05 trailblazer
Malo
Jan 19, 2014
Replies
16
Views
7K
Jan 24, 2014
kickass audio
K
R
Rainier is Stalling and has rough idle??
richbrown25
Aug 22, 2012
Replies
6
Views
7K
Sep 7, 2012
gmcman
T
I have a P0014 & P0526 and questions !
tcurlee
Jul 30, 2018
Replies
13
Views
7K
Nov 16, 2018
tcurlee
T
Bad/broken hose connected to the throttle body, don't know what hose is that
SLiNv_Vic
Jun 30, 2015
Replies
10
Views
7K
Jul 2, 2015
felicie
Trans running too cool?
Spong
Jan 18, 2012
Replies
20
Views
6K
Feb 3, 2012
neelskit
F
P1681 TPS error code
Fatty2004
Jul 14, 2021
Replies
7
Views
6K
Jul 15, 2021
mrrsm
Built 4l60e Replacement?
DenaliHD66
Sep 10, 2012
Replies
37
Views
6K
Nov 4, 2013
Sparky
K
#1 cylinder not firing
krazykrames
Jun 24, 2017
Replies
10
Views
6K
Jul 16, 2017
krazykrames
K
Service Engine and Reduce Engine Power lights
hawkeye405
Jan 30, 2017
Replies
27
Views
6K
Feb 19, 2017
hawkeye405
C
Cataclean
crash2e
Feb 9, 2012
Replies
5
Views
6K
Feb 10, 2012
Mark20
J
06 TB 4.2 stalling while braking..
jeffrobinson
Mar 31, 2014
2
3
Replies
85
Views
6K
Oct 24, 2014
jeffrobinson
J
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