Engine & Drivetrain

Repairs, tuning, modifications, & maintenance.

Vortec 4.2L I-6 New

2.5K
38.9K
Threads
2.5K
Posts
38.9K
H
Looking for a programmer that can disable SAIS codes for system removal
  • hsapir

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
gmcman
Transmission compatibility of pre '06 models
Replies
2
Views
490
gmcman
gmcman
C
Berryman's Soak number two. Thinking about adding some aeration?
Replies
3
Views
492
gmcman
gmcman
M
03 Trailblazer No crank, No start
Replies
2
Views
495
Mrautoserv72
M
C
Piston slap or rod knock?
Replies
2
Views
505
littleblazer
littleblazer
B
2004 envoy 4.2 engine lost oil
Replies
2
Views
508
Ben4.2
B
C
1 Quart in 2600 miles OK?
Replies
2
Views
509
Mooseman
Mooseman
gmcman
Where can I get the TCC PWM eliminator kit?
Replies
3
Views
511
Sparky
Sparky
MPB
New York State inspection fail
Replies
11
Views
512
AmpOverload
AmpOverload
WeaponX
Will the dual port muffler from an H3 work in my trailblazer?
Replies
1
Views
521
HARDTRAILZ
HARDTRAILZ
Ilikemy3s
New Truck/SUV Oil ?
Replies
2
Views
529
Mooseman
Mooseman
S
Slight hesitation/vibration at idle
Replies
10
Views
538
mrrsm
mrrsm
S
possible vac leak at throttle body/purge hose(?)
Replies
1
Views
556
Mooseman
Mooseman
M
4.2 motor swap
Replies
8
Views
557
Mooseman
Mooseman
C
Do the 5.3 Envoys and Trailblazers have the "Tow/Haul" feature?
Replies
6
Views
559
Mooseman
Mooseman
B
Fuel pump relay
Replies
2
Views
560
mrrsm
mrrsm
Ilikemy3s
Cleaning Air Box?
Replies
1
Views
566
Mooseman
Mooseman
F
I6 Blown head gasket
Replies
8
Views
567
Fishnbob
F
E
04 into 07 engine swap
Replies
1
Views
567
Mooseman
Mooseman
M
4x4 issue
Replies
5
Views
568
Mooseman
Mooseman
K
Evaporative System Monitor
Replies
1
Views
572
djthumper
djthumper
Yeagamyster04
Tbss intake injectors and throttle body upgrade then I lost 2nd gear 😔
Replies
3
Views
572
Yeagamyster04
Yeagamyster04
M
Water Pump
Replies
3
Views
574
mrrsm
mrrsm
T
Severe Miss after driving through water - possibly plugged cat?
Replies
5
Views
575
Blckshdw
Blckshdw
T
Loss of power
Replies
7
Views
579
TollKeeper
TollKeeper
K
transfercase output seal part # ?
Replies
4
Views
579
gmcman
gmcman
mrrsm
How to Install a Complete Exhaust System on the LL8 4X4 Envoys & Trailblazers
Replies
0
Views
595
mrrsm
mrrsm
flyboy2610
Question about CV axle angle
Replies
4
Views
597
flyboy2610
flyboy2610
littleblazer
Quick muffler question.
Replies
1
Views
597
Mathoran
Mathoran
M
2005 Trailblazer Starting Issues.
Replies
7
Views
602
Realism
Realism
5tjss
Need Recommendations for Shop to do Engine Swap
Replies
5
Views
602
5tjss
5tjss
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