Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.9K
Threads
2.5K
Posts
38.9K
Sqrly
Horn dose not work
  • Sqrly

Drivetrain New

1.1K
13.3K
Threads
1.1K
Posts
13.3K
filthyfingers
NEED HELP Tranny slipping and surging. 4WD switch flashing

Vortec 5.3L V8 New

393
5.2K
Threads
393
Posts
5.2K
christo829
Rate this Used Airfilter

LS2 6.0L V8

40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
T
Check Engine Light Confusion
Replies
27
Views
2K
TNEnvoyXL
T
Shdwdrgn
HPTuners trying to reset fuel trims
Replies
8
Views
4K
Shdwdrgn
Shdwdrgn
H
Fuel filter that won't fit a 2002!!
Replies
2
Views
1K
hashadenough
H
shrek77
Tranny Cooler placement anything to do with Transmission failure.
Replies
10
Views
1K
shrek77
shrek77
DenaliHD66
Anyone fill up with non-ethanol gas?
Replies
10
Views
1K
Jkust
J
DenaliHD66
Post your cruising speed numbers:
Replies
8
Views
915
Shdwdrgn
Shdwdrgn
Shdwdrgn
Section for discussion of custom tunes?
Replies
10
Views
1K
Shdwdrgn
Shdwdrgn
CDJuda
Ls1 engine swap
Replies
16
Views
3K
ScarabEpic22
ScarabEpic22
C
Strange Experience Today
Replies
3
Views
964
gmcman
gmcman
MikesTB
below regulated operating temp
Replies
3
Views
785
v7guy
V
B
Engine rattle with video
Replies
10
Views
1K
DenaliHD66
DenaliHD66
gmcman
Where to purchase fan clutch
Replies
28
Views
2K
DFWWIZ
DFWWIZ
C
Engine parts interchangeable with 2006 4.2
Replies
1
Views
988
jrSS
jrSS
C
Question on engine rebuild 4.2 2006 trailblazer
Replies
4
Views
2K
CASHKJ
C
B
Thumping while turning and braking
Replies
3
Views
921
CaptainXL
C
S
only getting about 4 qts of oil out on change?
Replies
3
Views
913
Matt
Matt
T
2002 v 2007 Envoy. Had them both and noticed some differences
Replies
13
Views
2K
gmcman
gmcman
C
2006 trailblazer removing engine-getting to transmission housing bolts?
Replies
8
Views
30K
dfc739
dfc739
S
Differential fill plug
Replies
3
Views
1K
seanpooh
seanpooh
KaRo
Heavy clunk from the rear or transfer case
Replies
6
Views
2K
KaRo
KaRo
N
Rough Idle...
Replies
9
Views
2K
johnnytutos
johnnytutos
J
3.73 to 3.42
Replies
17
Views
4K
Shdwdrgn
Shdwdrgn
05EnvoyXL
Belt tensioner 4.2 I6 question
Replies
5
Views
1K
CaptainXL
C
I
Engine flush or not
Replies
2
Views
1K
CaptainXL
C
C
Back and fourth play in crankshaft 2006 trailblazer 4.2
Replies
4
Views
2K
CaptainXL
C
G
Newbe fuel leak issue
Replies
7
Views
1K
BRomanJr
B
C-ya
Why change synthetic oil every 3,000 miles?
Replies
64
Views
6K
Sparky
Sparky
amweaver47
Problem With Gas Gauge
Replies
12
Views
1K
Wex
W
T
Remove/disable TCCM without Service 4WD/AWD light
Replies
7
Views
4K
timg
T
C
2006 4.2 Trailblazer Engine noise/knocking - VIDEO and SOUND
Replies
4
Views
2K
gmcman
gmcman
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