Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
Cancel

02-09 Vortec 4.2L I-6 Engine and Drivetrain

Create Post

OEM Issues

Original Equipment Repairs and/or Problems
71.6K
46.9M
71.6K
46.9M

Air Induction

Performance Air Intake/Air Induction Modifications
11.9K
4.7M
11.9K
4.7M

Exhaust Mods

Performance Exhaust Modifications
12.1K
4.5M
12.1K
4.5M

Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications
21.5K
10.5M
21.5K
10.5M

Transmission Mods

Performance Transmission Modifications
8.6K
5.6M
8.6K
5.6M

4x4 Drivetrain

4x4 Repairs & Problems
16.3K
10.2M
16.3K
10.2M
Jman423

Sticky = = = New threads may not be posted in this catagory, please select a sub-forum = = =

0
20K
 by Jman423
TopJimmy90

HELP!! Rough idle and exceptionally poor mileage

2
25
1K
 by Schurkey
E

Vibration when stopped and in D, smooth in N or P

3
175
 by Ravalli Surfer
I

Transmission leaking from bellhousing, what should I do?

2
26
929
 by Imjustauser
SR3000

I did a thing...

9
644
 by SR3000
jessebelanger1068

2003 chevy trailblazer 4×4 pulling code p0502

2
130
 by Ravalli Surfer
2003evoysle

New radiator came today.

8
431
 by 2003evoysle
LL1492

2004 transmission in 2005?

0
124
 by LL1492
SR3000

Caution: Purely for entertainment purposes only!

7
518
 by SR3000
518js97

Transfer case issues....again.

4
158
 by EnvoyBoy2004
O

4x4 not working

10
514
 by Snicklefritz4
L

2003 Trailblazer 4.2L engine miss - NO CEL Illuminated - HELP

3
187
 by chem_man
gpio230

O2 Oxygen Sensor

4
349
 by metalmike187
saiphak

rpm trouble

10
413
 by Brad_
M

PRNDL Lever Moves Full Range But does Not Shift out of Park

4
395
 by tinmanwpk
R

Mystery Plug

2
550
 by Ravalli Surfer
Dbwilliams807

Need to change CO2 sensors

12
718
 by Dbwilliams807
C

E15 Mistake:serious?

4
212
 by cprodave
S

2008 Trailblazer - Disconnected wire

4
316
 by Ravalli Surfer
J

Transmission fluid is black with only 100k miles - change or not?

2
29
2K
 by Ravalli Surfer
V

Alternator refuses to charge battery

1
206
 by Ravalli Surfer
scottjohnson247

2003 4x4 LT LL8 I6 w/ 200,000

7
966
 by Ravalli Surfer
M

Poll ... How many miles do you have on your trailblazer?

2 3 4
76
13K
 by Mr. Peabody
S

Spark plug threads stuck in head

2
24
1K
 by Ravalli Surfer
G

P0016 - check engine - Help save my Envoy!

3
334
 by Dsport5
Lemmiwinks

Extreme negative camber after suspension install

1
251
 by Ravalli Surfer
T

*FIXED* P2135

2
23
854
 by Ravalli Surfer
W

05 Trailblazer 4.2 p0340

5
454
 by chem_man
E

junk trailblazer

2
28
843
 by elrod309
Octavious

03 trailblazer LT 4.2 engine running rough

2
21
1K
 by Schurkey
G

P0172 Couldn't find the answer in a search

8
324
 by Ravalli Surfer
M

Can someone explain how the engine thermostat works on the I6 ?

3
301
 by Mr. Peabody
K

Front end pull to the right when I hit the gas then back to the left `

1
217
 by karayj
W

suspect my bcm has gone bad need assistance to troubleshoot

2
30
835
 by wes pierce
P

Ticking/Lawnmower Sound When Accelerating

11
385
 by Ravalli Surfer
VoyBoy919

2004 Trailblazer 4200 transmission wont go into 3rd gear even after a known good tranny was put in. Wiring??

6
479
 by Ravalli Surfer
02-09 Vortec 4.2L I-6 Engine and Drivetrain
Q&A forum for engine and drivetrain repairs/modifications/tuning.
Show more
160.6K posts
89.6M views
Join Community Grow Your Business

Forum Staff

View All
pdcomm
Admin
Top