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

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OEM Issues

Original Equipment Repairs and/or Problems
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41.3M
68.9K
41.3M

Air Induction

Performance Air Intake/Air Induction Modifications
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4.2M
11.7K
4.2M

Exhaust Mods

Performance Exhaust Modifications
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4M
12K
4M

Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications
21.2K
9.3M
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9.3M

Transmission Mods

Performance Transmission Modifications
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4.9M
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4x4 Drivetrain

4x4 Repairs & Problems
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15.5K
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Jman423
Sticky = = = New threads may not be posted in this catagory, please select a sub-forum = = =
0
20K
 by Jman423
S
Reduced Engine Power / Cam Phaser?
14
11K
 by Thirdcoastpcs
StreetTrainsOfIdaho
At my wits end.
6
497
 by Thirdcoastpcs
P
Acceleration on the Highway, advice sought.
11
2K
 by Thirdcoastpcs
C
Very slight knock noise when idling at operating temp/idle not very smooth.
4
101
 by Thirdcoastpcs
C
Plastic Radiator Patch/Repair vs. Replace.
8
275
 by mhatzung
Lane Flynn
Is it worth it?
5
348
 by Ravalli Surfer
BD Midkiff
Running hot
1
80
 by chem_man
H
2006 Envoy No Gears No Move
0
77
 by HFH
P
Fix one cause another unrelated
1
92
 by TJBaker
A
Will 2004 engine work in 2005 trailblazer?
1
66
 by TJBaker
K
2007 trailblazer 4.2 LT- Engine surges on start
2
97
 by chem_man
D
AC shuts off when turned on high
5
187
 by Ravalli Surfer
C
Best radiator for 2002 4.2L.
5
140
 by chem_man
C
Need help surging and mpg
0
109
 by Cfo1991
B
08 chevy trailblazer still over heats and boils into overflow
15
315
 by chem_man
R
Trailer Brake Question
7
2K
 by Ravalli Surfer
Hopper
2005 GMC Envoy SLT 4x4
4
271
 by Hopper
O
Grinding/ Clanking Noise from rear of car
4
452
 by MikEr
Shadetree74
Transmission works temporarily
1
130
 by Ravalli Surfer
C
No start except when i jiggle Steering Wheel.
2 3
46
1K
 by Wildvortex
O
Half Shaft Oil Leak. VIDEO INCLUDED.
7
257
 by Ock
SilverShadow91
Diesel sound?
1
120
 by SilverShadow91
B
05 Trailblazer Running Poor after Engine Swap
15
541
 by chem_man
M
Poll ... How many miles do you have on your trailblazer?
2 3
48
4K
 by eliteroger
B
06 Trailblazer i6 Upper Engine noise, I suspect a broken exhaust valve spring?
2
22
1K
 by bac217
M
2003 Envoy 4.2 I6 ABS, Brake service light stalling and wont start
0
143
 by mikedida18
C
Unnecessary 2nd Cover Underhood "Fuse Relay Center"?
5
354
 by cprodave
AdamS715
2005 trailblazer compatible engine swaps
8
556
 by wes pierce
A
Engine swap
3
250
 by bwbeeman
ilv2rk
Keeps throwing a P0014: HELP!!!! Can’t figure this one out!
3 4 5
81
3K
 by mikejenner972
D
08 4x4 4.2l engine/transmission installation
0
122
 by doublegimp
J
07 Chevy trailblazer 4.2 v6 problems help
3
310
 by Ravalli Surfer
C
Serpentine belt problems 07 Trailblazer 4.2 L
1
138
 by Ravalli Surfer
N
06 TB ECM replacement (help me)
7
310
 by Ravalli Surfer
O
P0335, hard starting, no rpm gauge
4
251
 by NJTB04
02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.
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