02-09 Vortec 4.2L I-6 Engine and Drivetrain | Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

OEM Issues

Original Equipment Repairs and/or Problems

68.6K

40.2M

9 h ago

68.6K

40.2M

9 h ago

Air Induction

Performance Air Intake/Air Induction Modifications

11.6K

4.2M

5 d ago

11.6K

4.2M

5 d ago

Exhaust Mods

Performance Exhaust Modifications

12K

4M

2 mo ago

12K

4M

2 mo ago

Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications

21.2K

9.1M

16 h ago

21.2K

9.1M

16 h ago

Transmission Mods

Performance Transmission Modifications

8.3K

4.8M

20 d ago

8.3K

4.8M

20 d ago

4x4 Drivetrain

4x4 Repairs & Problems

15.5K

8.7M

19 h ago

15.5K

8.7M

19 h ago

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0

20K

06 TB ECM replacement (help me)

1

26

P0335, hard starting, no rpm gauge

Ock
5 d ago

4

119

by NJTB04

Purchased a work in progress

5

229

Engine rumbles when in drive + braked/stopped

KML
7 mo ago

9

464

02 trailblazer transmission issue.

10

355

by Ravalli Surfer

Bought used 2004 that has low compression in cylinder 3

1

105

by NJTB04

Replaced Starter Won't Start

2

20

578

by Ravalli Surfer

Does the 4.2 I6 have a balancer chain?

2

110

by slowsl

Likely a bad water pump, is my fan clutch bad too?

2

30

2K

by KML

Rear Brake line replacement

11

319

by Ravalli Surfer

2006 envoy tired motor and vvt issue new motor compatablety issue?

12

420

Reduced Engine Power / Cam Phaser?

13

11K

by Ravalli Surfer

Reduced engine power

8

410

Crank, No Start (Kinda)

1

144

Tired of throwing parts, please help!

16

447

Rear left and right tail lights do not work.

3

147

by EnvoyBoy2004

Oil filter issue

2

174

Noise after driver side cv axle repair.

1

143

by Ravalli Surfer

Engine running rough and missfiring

15

527

12

544

by ksukat

2007 GMC Envoy one way check valve location? Code 2440

1

178

Engine vibration

15

526

Keeps throwing a P0014: HELP!!!! Can’t figure this one out!

3 4 5

80

2K

1

183

by Ravalli Surfer

Looking for parts

1

109

CV Axle replacement turned into a nightmare. Need help!

2

398

by fhazie

Envoy engine wont start

1

120

Transmission problem

2

251

Evap gas tank vent solenoid

2

238

by motor_mischief_and_fire

What is my gear ratio

5

178

New Transmission revs after 2nd gear. R, 1st, 2nd work, after that it just revs.

18

3K

by Ravalli Surfer

Change vvt now have misfired

1

171

0

145

by Chrisgkempton

Transmission problems

7

488

1

134

by Ravalli Surfer