Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.9K
Threads
2.5K
Posts
38.9K
B
P0135

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
corky
New exhaust manifold
Replies
4
Views
581
JayArr
JayArr
mrrsm
How to Install a Complete Exhaust System on the LL8 4X4 Envoys & Trailblazers
Replies
0
Views
579
mrrsm
mrrsm
K
transfercase output seal part # ?
Replies
4
Views
575
gmcman
gmcman
K
Evaporative System Monitor
Replies
1
Views
571
djthumper
djthumper
5tjss
Need Recommendations for Shop to do Engine Swap
Replies
5
Views
571
5tjss
5tjss
T
Severe Miss after driving through water - possibly plugged cat?
Replies
5
Views
570
Blckshdw
Blckshdw
M
Water Pump
Replies
3
Views
568
mrrsm
mrrsm
E
04 into 07 engine swap
Replies
1
Views
563
Mooseman
Mooseman
M
4x4 issue
Replies
5
Views
562
Mooseman
Mooseman
B
Fuel pump relay
Replies
2
Views
556
mrrsm
mrrsm
M
2005 Trailblazer Starting Issues.
Replies
7
Views
555
Realism
Realism
S
possible vac leak at throttle body/purge hose(?)
Replies
1
Views
552
Mooseman
Mooseman
T
Loss of power
Replies
7
Views
551
TollKeeper
TollKeeper
Ilikemy3s
Cleaning Air Box?
Replies
1
Views
546
Mooseman
Mooseman
M
4.2 motor swap
Replies
8
Views
542
Mooseman
Mooseman
F
I6 Blown head gasket
Replies
8
Views
540
Fishnbob
F
Yeagamyster04
Tbss intake injectors and throttle body upgrade then I lost 2nd gear 😔
Replies
3
Views
538
Yeagamyster04
Yeagamyster04
Ilikemy3s
New Truck/SUV Oil ?
Replies
2
Views
526
Mooseman
Mooseman
WeaponX
Will the dual port muffler from an H3 work in my trailblazer?
Replies
1
Views
514
HARDTRAILZ
HARDTRAILZ
C
1 Quart in 2600 miles OK?
Replies
2
Views
503
Mooseman
Mooseman
S
Slight hesitation/vibration at idle
Replies
10
Views
502
mrrsm
mrrsm
B
2004 envoy 4.2 engine lost oil
Replies
2
Views
500
Ben4.2
B
C
Do the 5.3 Envoys and Trailblazers have the "Tow/Haul" feature?
Replies
6
Views
498
Mooseman
Mooseman
gmcman
Where can I get the TCC PWM eliminator kit?
Replies
3
Views
493
Sparky
Sparky
C
Berryman's Soak number two. Thinking about adding some aeration?
Replies
3
Views
490
gmcman
gmcman
M
03 Trailblazer No crank, No start
Replies
2
Views
487
Mrautoserv72
M
C
Piston slap or rod knock?
Replies
2
Views
481
littleblazer
littleblazer
R
Torque on intake gasket 2007 Blazer 3.4 litter
Replies
2
Views
479
Mooseman
Mooseman
Ilikemy3s
Engine sensor PM ?
Replies
2
Views
479
Ilikemy3s
Ilikemy3s
MPB
New York State inspection fail
Replies
11
Views
474
AmpOverload
AmpOverload
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