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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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70.2K
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Air Induction

Performance Air Intake/Air Induction Modifications
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Performance Exhaust Modifications
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4.2M
12K
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Engine Tunes/Mods

Performance Engine Tuning/Engine Modifications
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9.9M
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Transmission Mods

Performance Transmission Modifications
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4x4 Drivetrain

4x4 Repairs & Problems
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Jman423
Sticky = = = New threads may not be posted in this catagory, please select a sub-forum = = =
0
20K
 by Jman423
C
Multiple Evap Solenoid Replacements.
7
137
 by chem_man
KollinKnack06
Trailblazer oil pressure issue
2
35
901
 by tomcat709
B
Can blowby cause this?
19
577
 by RPatton76
Y
High LTFT 22% on idle
2
224
 by yasinag
Justin G
Misfire on cylinder 3
6
244
 by Ravalli Surfer
ThatLSguy
'05 TB Overheating
6
267
 by kanaikid619
dairyseed2
2004 trail blazer 4200 engine issues.
2
28
788
 by tomcat709
Cody0426
Help please!!! No crank no start
13
333
 by Mr. Sparky
A
4.2 burning concerning amount of oil at high sustained RPMs
2
304
 by Ock
03 trailblazer ls 4.2
Had a slight ticiking noise/ then a slight squeek a d now knocking
1
115
 by Ravalli Surfer
R
idle drop
2
23
8K
 by chem_man
Alex Seachrist
2005 trailblazer won't go in 3rd
8
133
 by chem_man
O
HELP! Strawberry Milkshake
16
470
 by Schurkey
Cwarner8996
Engine and transmission compatibility
10
419
 by sw904
cr42yd473
04 TB transmission won't engage gears... help!
14
420
 by metalmike187
jreed01
Strange Transmission Noise after Fluid and Filter Change
2
26
595
 by Ravalli Surfer
btevis01
No Reverse and unable to get transmission dipstick back in
3
160
 by Ravalli Surfer
I
Trailblazer 4WD 2007 Acceleration vibration solved
2
21
998
 by Highfiver
zamar
Oil Dipstick
19
10K
 by keagz
T
2003 TB transmission issue
2
207
 by TerryM2003
IdkWhatToUseForA Name
Oil leak
15
523
 by DDS-029
J
Transmission fluid is black with only 100k miles - change or not?
18
590
 by Diamond193
B
Timing Chain Replacement 2003 Bravada P1345
16
292
 by chem_man
Drake n
High rpm and poor acceleration
0
198
 by Drake n
C
Latest Concensus: 4.2L RWD Transmission Fluid Change.
2
38
2K
 by NJTB04
B
2008 trailblazer losing coolant thus overheating
4
212
 by Ravalli Surfer
rebatrarobertlovealw
Acceleration issues 03 Trailblazer
1
180
 by chem_man
Philthetech86
Replaced front differential now no crank
1
146
 by gabelossus
GeorgeF
Anyone try E3.74 e3 plugs in 4.2?
4
186
 by Ander27
thekappatalist
Transmission grinding from cold start while in drive
2
26
605
 by pdcomm
M
HELP! Limp mode in warm weather only
2
24
626
 by Diamond193
TrailblazerDanC
No start/crank after engine swap 2006 Trailblazer 4.2
6
234
 by Ravalli Surfer
O
Cylinder 3 Misfire
2 3
43
1K
 by Ravalli Surfer
R
Fan Clutch Failure Symptoms?
14
29K
 by chem_man
bahaaldinrjob
What it name and whats doing in car
3
377
 by Ravalli Surfer
02-09 Vortec 4.2L I-6 Engine and Drivetrain
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