Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.9K
Threads
2.5K
Posts
38.9K
mrrsm
PO442

Drivetrain New

1.1K
13.3K
Threads
1.1K
Posts
13.3K
B
Normal Transmission Temperature?

Vortec 5.3L V8 New

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

LS2 6.0L V8

40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
ghost_leader07
NEED HELP P0171 on my 04 Trailblazer LT won't go away
Replies
117
Views
8K
mrrsm
mrrsm
Aec678
NEED HELP Fan Clutch from hell lol
Replies
58
Views
5K
TJBaker57
TJBaker57
HizAndHerz
NEED HELP Flex plate cracked: do I need to pull transmission?
Replies
51
Views
15K
HizAndHerz
HizAndHerz
2advanced
NEED HELP High Negative LTFT / Poor Gas Mileage
Replies
51
Views
11K
Tankcruiser
Tankcruiser
ghost_leader07
NEED HELP Overheating issue with AC ON!
Replies
49
Views
3K
ghost_leader07
ghost_leader07
Charles Austin Miller
NEED HELP TB EXT dropping out of gear, overheating
Replies
40
Views
3K
jsheahawk
jsheahawk
l008com
NEED HELP Stick Dipstick!
Replies
38
Views
6K
Mooseman
Mooseman
R
NEED HELP 06 Trailblazer EXT 4.2 Engine swap
Replies
30
Views
5K
NJTB
N
hawkeye405
NEED HELP Exhaust drone
Replies
29
Views
6K
hawkeye405
hawkeye405
ghost_leader07
NEED HELP Possible bad fuel pump (confirmation needed)
Replies
28
Views
996
mrrsm
mrrsm
S
NEED HELP 4x4 Working strange
Replies
25
Views
2K
chris68369
C
C
NEED HELP Stalled
Replies
25
Views
3K
cretecrawler
C
redline customs
NEED HELP 03 sounds like its "dieseling"
Replies
22
Views
5K
mrrsm
mrrsm
V
NEED HELP Doesn’t stay running when cold
Replies
20
Views
2K
Voy07
V
R
NEED HELP Annoying chirp under hood
Replies
19
Views
3K
richphotos
R
eutechnyx
NEED HELP Ac Compressor clutch not engaging
Replies
19
Views
6K
jsheahawk
jsheahawk
gmcman
NEED HELP Replacing LH bearing in front diff, have questions.
Replies
19
Views
2K
gmcman
gmcman
H
NEED HELP Trailblazer Overheating / Coolant
Replies
19
Views
18K
mrrsm
mrrsm
L
NEED HELP Transmission problems (tcc, shifting)
Replies
18
Views
4K
seanpooh
seanpooh
C
NEED HELP Starter only clicks
Replies
18
Views
2K
cretecrawler
C
G
NEED HELP Runs drives fine cold warms up and stalls no restart
Replies
17
Views
3K
Maverick6587
Maverick6587
psa55
NEED HELP P0651
Replies
17
Views
4K
mrrsm
mrrsm
UsernameIsTaken
NEED HELP Persistent P2138 And Reduced Engine Power
Replies
17
Views
4K
UsernameIsTaken
UsernameIsTaken
D
NEED HELP Rear Differential identification and possible rebuild!!
Replies
16
Views
5K
darknight76
D
MrShelley
NEED HELP Recommended Exhaust Manifold Replacement?
Replies
15
Views
2K
Schurkey
Schurkey
SLiNv_Vic
NEED HELP DEXRON VI Mixed with Nasty Old DEXRON III?
Replies
15
Views
17K
mrrsm
mrrsm
Mikefred7370
NEED HELP 2006 TrailBlazer "Crank no start"
Replies
14
Views
2K
Mikefred7370
Mikefred7370
Drec
NEED HELP Shifter locked in neutral
Replies
14
Views
1K
Drec
Drec
G
NEED HELP 2002 Envoy will not move till 1500rpm...and other stuff.
Replies
13
Views
2K
shovenose
shovenose
G
NEED HELP Service Brakes, tranny slipping, spedo jumping, A/C drive hot:pass cold! No problem lights!?
Replies
12
Views
1K
GoldRainier
G
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