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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
67.6K 37.3M
  • 67.6K
  • 37.3M

Air Induction

Performance Air Intake/Air Induction Modifications
11.6K 4M
  • 11.6K
  • 4M

Exhaust Mods

Performance Exhaust Modifications
12K 3.8M
  • 12K
  • 3.8M

Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications
21.1K 8.6M
  • 21.1K
  • 8.6M

Transmission Mods

Performance Transmission Modifications
8.2K 4.5M
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4x4 Drivetrain

4x4 Repairs & Problems
15.1K 8M
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Sticky = = = New threads may not be posted in this catagory, please select a sub-forum = = =
0
19K
 by Jman423
Poor fuel economy and not as peppy
1
35
 by plscolla
Loss of power but only for a few seconds
3
57
 by plscolla
Likely a bad water pump, is my fan clutch bad too?
2
27
1K
 by KML
Aux cooling fan
0
65
 by Kylep
Help!!
6
246
 by Vega_TB
Fan Clutch swapout to Electric Fan
5
412
 by flyboy2610
New Transmission revs after 2nd gear. R, 1st, 2nd work, after that it just revs.
17
2K
 by TigerMike1
Engine knock with stalls. Engine swap TB>Envoy
2
197
 by Hoover_MuffMan
Oul leak after water pump replacement.
11
410
 by Vega_TB
Fuel tank capacity
1
166
 by EnvoyBoy2004
Electric cooling fan
0
108
 by Kylep
Random misfires
1
152
 by plscolla
Motor mount help
0
102
 by Kylep
03 Envoy falls on itself while under heavy acceleration but seems fine at light pedal
2
29
1K
 by conetopia
swapping in a 06 4wd transmission into a 02 4wd trailblazer?
1
206
 by EnvoyBoy2004
Trans cooler help!
0
46
 by Kylep
2004 Envoy won't move in any gear
9
393
 by drjascott
Wants to stall when AC kicks on
1
208
 by EnvoyBoy2004
Casey
0
134
 by Jack casey
What does this connector go to?
1
103
 by Vega_TB
04 envoy 4.2l Reduced Engine Power
11
640
 by GoodoleEnvoy
RPM fluctuation
5
239
 by rickym1490
Rough Idle but no check engine light
7
406
 by JGreco
Fuel pressure regulator
11
706
 by Envoy_999
03 TB p0128 running rough
10
365
 by Mudpaws
Solenoid equivalent
8
283
 by Grinder
4wd motor compatibility with a 2wd 08 envoy
1
102
 by EnvoyBoy2004
Entire coolant system replaced, still overheating
6
192
 by Cathairez
ABS Codes related?
1
124
 by TJBaker
07 trans intetchange
2
123
 by TJBaker
2008 TB Electrical problems
0
104
 by ceast71112
CAN BUS or not...
6
312
 by Ravalli Surfer
07 trans swap
0
82
 by Derangedtechniques
Cheap chevy trailblazer starters on ebay or Hexautoparts
1
149
 by plscolla
2004 4.2 vortec straight 6 trailblazer swap to a 2007?
1
161
 by TJBaker
02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.
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