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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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Air Induction

Performance Air Intake/Air Induction Modifications
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Exhaust Mods

Performance Exhaust Modifications
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Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications
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Transmission Mods

Performance Transmission Modifications
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4x4 Drivetrain

4x4 Repairs & Problems
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Sticky = = = New threads may not be posted in this catagory, please select a sub-forum = = =
0
19K
 by Jman423
2004 Envoy won't move in any gear
8
143
 by plscolla
04 envoy 4.2l Reduced Engine Power
11
536
 by GoodoleEnvoy
RPM fluctuation
5
212
 by rickym1490
03 Envoy falls on itself while under heavy acceleration but seems fine at light pedal
2
28
1K
 by plscolla
New Transmission revs after 2nd gear. R, 1st, 2nd work, after that it just revs.
3
386
 by Ravalli Surfer
Rough Idle but no check engine light
7
372
 by JGreco
Fuel pressure regulator
11
673
 by Envoy_999
03 TB p0128 running rough
10
322
 by Mudpaws
Solenoid equivalent
8
255
 by Grinder
4wd motor compatibility with a 2wd 08 envoy
1
94
 by EnvoyBoy2004
Entire coolant system replaced, still overheating
6
161
 by Cathairez
ABS Codes related?
1
106
 by TJBaker
07 trans intetchange
2
103
 by TJBaker
2008 TB Electrical problems
0
83
 by ceast71112
CAN BUS or not...
6
204
 by Ravalli Surfer
07 trans swap
0
63
 by Derangedtechniques
Cheap chevy trailblazer starters on ebay or Hexautoparts
1
138
 by plscolla
2004 4.2 vortec straight 6 trailblazer swap to a 2007?
1
141
 by TJBaker
Trailblazer ext swap
5
500
 by rcott01
07 4.2 lt coolant leak
4
334
 by plscolla
Mystery Spring
3
700
 by Bollweevil
Code P0172 sputtering stalling rough idle
5
435
 by Envoy_999
Mystery Spring
1
134
 by pdcomm
Mystery Spring
0
127
 by TBHawaii
Grinding/ Clanking Noise from rear of car
1
100
 by Ock
Engine swap and no start
2
205
 by Sharkboyyy
2004 lzt trailblazer
1
102
 by jacord2095
Rod knock? What else could it be...
1
255
 by xTratrestrial
Rough idle and stalling
9
560
 by Brucien
Shifting at high rpm
1
300
 by EnvoyBoy2004
Vvt
13
1K
 by Envoy_999
Motor
0
107
 by Zie2306
A/C not cold
1
274
 by EnvoyBoy2004
Lots of codes don’t know where to start
2
181
 by Envoy_999
Ticking noise when accelerating
10
737
 by Envoy_999
02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.
149.6K posts
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