Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.9K
Threads
2.5K
Posts
38.9K
V
PO442

Drivetrain New

1.1K
13.3K
Threads
1.1K
Posts
13.3K
JayArr
Crimping new trans cooler lines

Vortec 5.3L V8 New

394
5.2K
Threads
394
Posts
5.2K
0
Runs rough couple miles after starting

LS2 6.0L V8

40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
L
wont start when it rains
Replies
4
Views
1K
shovenose
shovenose
JOE60ISH
2007 Trailblazer SS starting issues
Replies
4
Views
3K
JOE60ISH
JOE60ISH
K
transfercase output seal part # ?
Replies
4
Views
579
gmcman
gmcman
WeaponX
New cat back exhaust ?’s
Replies
4
Views
1K
HARDTRAILZ
HARDTRAILZ
TXBlazer
Really Sick 4.2 build!
Replies
4
Views
1K
C-ya
C-ya
C
Question on engine rebuild 4.2 2006 trailblazer
Replies
4
Views
2K
CASHKJ
C
S
NEED HELP 2004 Envoy won't start
Replies
4
Views
1K
Chickenhawk
Chickenhawk
K
transmission slipping
Replies
4
Views
1K
Reprise
Reprise
WeaponX
Intake manifold question
Replies
4
Views
1K
WeaponX
WeaponX
RiverGuy
Confirmed: Clearing codes re-enables Cruise Control
Replies
4
Views
878
AmpOverload
AmpOverload
J
Transmission problems on gmc envoy
Replies
4
Views
3K
John in RI
John in RI
Shana7711
AC Condensation Drainage tube
Replies
4
Views
4K
Shana7711
Shana7711
John Koda
TCM LOCATION
Replies
4
Views
5K
Chickenhawk
Chickenhawk
roadmaven
5.3L O2 Sensors
Replies
4
Views
984
RayVoy
RayVoy
S
Exhaust does not fit
Replies
4
Views
930
Stuntmanmike77
S
S
Heater hose connector broken and stuck
Replies
4
Views
5K
S13Hitman
S
T
Where did GM Hide the 05-on Fuel Pressure regulator on the Trailblazers?
Replies
4
Views
1K
BRomanJr
B
A
Exhaust Mod/ Redo
Replies
4
Views
1K
DJones
DJones
blazinlow89
The saga of the T-stat (and other stories)
Replies
4
Views
1K
TollKeeper
TollKeeper
KHS
Pre-Lube System?
Replies
4
Views
1K
03envoy
03envoy
Z
New Battery
Replies
4
Views
950
C-ya
C-ya
C
Back and fourth play in crankshaft 2006 trailblazer 4.2
Replies
4
Views
2K
CaptainXL
C
D
Died and won't start.
Replies
4
Views
1K
Mooseman
Mooseman
Mark20
Urgent - Can I connect battery with PCM removed
Replies
4
Views
1K
sevendj
S
TexazReece
Son of a P1682
Replies
4
Views
913
djthumper
djthumper
C
06 Denali exhaust suggestions/questions, will either of these fit????
Replies
4
Views
919
Pittdawg
Pittdawg
S
NEED HELP 2006 9-7x Transmission issues.
Replies
4
Views
2K
SaabNoob
S
K
SeaFoam
Replies
4
Views
1K
Justin_kyllo
J
I
Front Axle leaking something, and a loud droning noise.
Replies
4
Views
1K
Integraoligist
I
WeaponX
Loud banging and strong vibration, HELP!
Replies
4
Views
957
Mooseman
Mooseman
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