Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.8K
Threads
2.5K
Posts
38.8K
Mike534x
OEM Thermostat Temperature

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

392
5.2K
Threads
392
Posts
5.2K
Mike534x
Catalytic converter replacement options EPA vs carb

LS2 6.0L V8

40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
flyboy2610
What happens if you overfill your engine oil?
Replies
4
Views
123
flyboy2610
flyboy2610
S
Got stranded
Replies
6
Views
167
TollKeeper
TollKeeper
W
Defective Battery or did my TB fry it?
Replies
4
Views
148
mrrsm
mrrsm
T
NEED HELP Please, help accessing front 3 bolts on oil pan in order to remove it.
Replies
2
Views
174
Mooseman
Mooseman
C
BG Products E.P.R. Seems to be helping oil consumption
Replies
0
Views
110
c good
C
Btorres1977GContractor
Please Help Identify Broken Sensor
Replies
1
Views
254
mrrsm
mrrsm
M
2005 Trailblazer Starting Issues.
Replies
7
Views
516
Realism
Realism
Ilikemy3s
Bound to happen sooner or later
Replies
5
Views
303
mrrsm
mrrsm
MPB
New York State inspection fail
Replies
11
Views
437
AmpOverload
AmpOverload
K
2002 Trailblazer airbox question
Replies
3
Views
205
Blckshdw
Blckshdw
C
Worth picking up an extra engine?
Replies
6
Views
395
c good
C
W
Thermostat Preventative/Proactive Replacement
Replies
13
Views
553
wormwood1978
W
Realism
Whirring buzz from under the hood, take a guess
Replies
12
Views
595
Realism
Realism
C
BG EPR oil treatment?
Replies
3
Views
333
Mooseman
Mooseman
C
Do the 5.3 Envoys and Trailblazers have the "Tow/Haul" feature?
Replies
6
Views
450
Mooseman
Mooseman
C
2002 Envoy, 4x4. Starter motor replacement tips?
Replies
6
Views
332
TollKeeper
TollKeeper
S
Slight hesitation/vibration at idle
Replies
10
Views
479
mrrsm
mrrsm
ghost_leader07
NEED HELP Possible bad fuel pump (confirmation needed)
Replies
28
Views
963
mrrsm
mrrsm
M
E-Fan issue
Replies
5
Views
407
Mooseman
Mooseman
gmcman
Where can I get the TCC PWM eliminator kit?
Replies
3
Views
464
Sparky
Sparky
B
No crank no start isn't it lovely
Replies
83
Views
2K
bennieRohde
B
movietvet
2002 TB 4.2 died at stop & immediate restart
Replies
51
Views
2K
movietvet
movietvet
Dmflash
P0495 code
Replies
6
Views
303
Mooseman
Mooseman
Firebyrd91
Low Voltage to Transmission Pressure Switch
Replies
0
Views
288
Firebyrd91
Firebyrd91
J
How to remove battery tray 2004 TB LS?
Replies
2
Views
251
Mooseman
Mooseman
l008com
NAPA High Mileage Oil?
Replies
4
Views
642
Know1else
K
T
2003 Trailblazer LT Ext cranks but wont start no fuel pressure
Replies
6
Views
406
Mooseman
Mooseman
E
Parts cleaner to clean oil pickup tube
Replies
21
Views
1K
emedlin
E
rolo95
temp raise after 15 min drive with AC on, but go back if i turn off AC
Replies
21
Views
810
aaserv
aaserv
W
Exhaust Pipe to Manifold Gasket
Replies
5
Views
408
wormwood1978
W
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