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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
67.8K 37.6M
  • 67.8K
  • 37.6M

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 8.7M
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  • 8.7M

Transmission Mods

Performance Transmission Modifications
8.2K 4.5M
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4x4 Drivetrain

4x4 Repairs & Problems
15.2K 8.1M
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0
19K
 by Jman423
english bulldog puppies for sale near me
2
53
 by flyboy2610
Poll ... How many miles do you have on your trailblazer?
7
163
 by Diamond193
Replace torque converter in my 06 TB LS 4.2L-I6 4WD
1
90
 by WJH
Shifter locking in reverse won’t shift or start!!!
0
51
 by zrafferty93
Transmission issue.
1
134
 by scupper
Replace Torque Converter 06 Trailblazer LS 4.2L-I6 4WD
0
73
 by scupper
High idle
1
88
 by plscolla
Wants to stall when AC kicks on
2
325
 by Steve1313
Starting issue
3
120
 by plscolla
Thermostat information.
7
366
 by Ravalli Surfer
Need guidance 4.2l mods
1
129
 by TJBaker
Transmission fluid leak
4
205
 by FatTony
Rear differential fill
8
330
 by scbill
Motor
2
112
 by Vega_TB
Likely a bad water pump, is my fan clutch bad too?
2
28
1K
 by KML
Starter solenoid bolt
1
85
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P1516 p2101 p0102
2
87
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Poor fuel economy and not as peppy
2
211
 by snoopswa
2004 Envoy 4.2 Engine coolant level sensor
4
213
 by EnvoyBoy2004
Loss of power but only for a few seconds
3
253
 by plscolla
Aux cooling fan
0
114
 by Kylep
Help!!
6
327
 by Vega_TB
Fan Clutch swapout to Electric Fan
5
498
 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
273
 by Hoover_MuffMan
Oul leak after water pump replacement.
11
482
 by Vega_TB
Fuel tank capacity
1
199
 by EnvoyBoy2004
Electric cooling fan
0
134
 by Kylep
Random misfires
1
220
 by plscolla
Motor mount help
0
155
 by Kylep
03 Envoy falls on itself while under heavy acceleration but seems fine at light pedal
2
29
2K
 by conetopia
swapping in a 06 4wd transmission into a 02 4wd trailblazer?
1
291
 by EnvoyBoy2004
Trans cooler help!
0
78
 by Kylep
2004 Envoy won't move in any gear
9
437
 by drjascott
Casey
0
157
 by Jack casey
02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.
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