Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6

Threads
2.1K
Messages
32.2K
Threads
2.1K
Messages
32.2K
Mounce
First look at air filter and throttle body.

Drivetrain

Threads
873
Messages
10.6K
Threads
873
Messages
10.6K
T
SOLVED! Won't go into gear

Vortec 5.3L V8

Threads
308
Messages
3.9K
Threads
308
Messages
3.9K
MRRSM
Aftermarket headers

LS2 6.0L V8

Threads
35
Messages
768
Threads
35
Messages
768
xavierny25
NEED HELP Tb SS transmission replacement.
Mounce
P0455 and gas tank gurgle
Replies
4
Views
42
MRRSM
MRRSM
G
NEED HELP Service Brakes, tranny slipping, spedo jumping, A/C drive hot:pass cold! No problem lights!?
Replies
9
Views
183
GoldRainier
G
U
Replace engine Question
Replies
2
Views
74
MRRSM
MRRSM
K
2002 envoy front def issue
Replies
22
Views
170
HARDTRAILZ
HARDTRAILZ
WeaponX
radiator cap leak
Replies
3
Views
65
Mooseman
Mooseman
coolride
Transmission line uncoupled
Replies
35
Views
312
coolride
coolride
UsernameIsTaken
NEED HELP Persistent P2138 And Reduced Engine Power
Replies
17
Views
290
UsernameIsTaken
UsernameIsTaken
WeaponX
Another fuel injector install aftermath question Yippee!!
2
Replies
47
Views
436
WeaponX
WeaponX
C
NEED HELP Valve spring retainers popped off
Replies
9
Views
96
chaphar540
C
WeaponX
A good place to get a CAT and exhaust that doesn’t cost an arm
Replies
2
Views
104
WeaponX
WeaponX
U
Car Stalls won't restart.
Replies
22
Views
303
Mooseman
Mooseman
WeaponX
Will the dual port muffler from an H3 work in my trailblazer?
Replies
1
Views
70
HARDTRAILZ
HARDTRAILZ
l008com
NEED HELP Stick Dipstick!
Replies
18
Views
356
Mektek
M
G
NEED HELP Cranks but won't start after driving.
2
Replies
59
Views
953
GBOfan
G
2
SOLVED! Higher LTFT at idle and higher at rpms
2
Replies
76
Views
927
MRRSM
MRRSM
gmcman
Hopefully solved a high negative LTFT at idle
Replies
1
Views
63
Reprise
Reprise
U
Can anyone tell me what this is?
Replies
2
Views
133
Mooseman
Mooseman
WeaponX
New injectors in but throttle body dead?
Replies
9
Views
161
WeaponX
WeaponX
WeaponX
Has anyone ever changed their fuel injectors?
Replies
6
Views
211
WeaponX
WeaponX
T
Can NP126 transfer case be swapped into 2006 Saab 9-7x 4.2L?
Replies
5
Views
97
teachguy
T
B
NEED HELP Fuel leak
Replies
8
Views
180
MRRSM
MRRSM
2advanced
NEED HELP High Negative LTFT / Poor Gas Mileage
2
Replies
51
Views
1K
Tankcruiser
Tankcruiser
M
Front End Growl
Replies
9
Views
239
HARDTRAILZ
HARDTRAILZ
M
Oil Pressure Gage
2
Replies
49
Views
1K
Mooseman
Mooseman
U
2 Misc Engine Q's
Replies
11
Views
209
gmcman
gmcman
N
Rear brake Backing Plate
Replies
4
Views
102
nozzleman
N
M
Independent Rear Suspension (IRS) Possible?
Replies
17
Views
241
Maverick6587
M
S
Hard shifting, no tc lockup
Replies
21
Views
322
Mooseman
Mooseman
S
Gev 5 and gen 4 v8 Differences
Replies
2
Views
116
Mooseman
Mooseman
N
SOLVED! Envoy gear shift
Replies
9
Views
193
MRRSM
MRRSM
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