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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
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OEM Thermostat Temperature
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Drivetrain
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NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
392
5.2K
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392
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5.2K
Catalytic converter replacement options EPA vs carb
Feb 18, 2024
Mike534x
LS2 6.0L V8
40
839
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839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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Tbss intake injectors and throttle body upgrade then I lost 2nd gear 😔
Yeagamyster04
Feb 10, 2023
Replies
3
Views
512
Feb 11, 2023
Yeagamyster04
SOLVED!
4.2 cam phaser 03 Tb Ext LT
mattpaul89
Jan 13, 2023
Replies
12
Views
1K
Feb 7, 2023
mrrsm
C
Piston slap or rod knock?
c good
Feb 3, 2023
Replies
2
Views
464
Feb 5, 2023
littleblazer
ENGINE SWAP: 2004 for 2002 GM ATLAS 4.2L MOTOR
mrrsm
Jul 11, 2016
2
3
4
5
Replies
168
Views
31K
Feb 3, 2023
mrrsm
S
knocking noise from transmission and stalling
santon
Jan 30, 2023
Replies
9
Views
2K
Feb 1, 2023
mrrsm
E
Doing DoD delete on 05 Envoy 5.3, which cam do I choose?
EnvoyMan
Jan 27, 2023
Replies
3
Views
1K
Jan 27, 2023
EnvoyMan
E
Transmission replacement
corky
Jan 23, 2023
Replies
6
Views
579
Jan 27, 2023
aaserv
Filters arrived, have to go back under the TB
movietvet
Jan 18, 2023
Replies
23
Views
1K
Jan 24, 2023
movietvet
The fluid purge has started & ended.
movietvet
Jan 15, 2023
Replies
10
Views
745
Jan 16, 2023
movietvet
Alternator compatibility between years
gmcman
Jan 15, 2023
Replies
2
Views
300
Jan 16, 2023
gmcman
SOLVED!
Ringing whistle? HVAC disruption during servicing? Or?
Elizabetty
Dec 6, 2022
Replies
36
Views
2K
Jan 10, 2023
Mooseman
C
Envoy lurches slightly forward when in Park and starting.
c good
Dec 28, 2022
Replies
7
Views
606
Dec 29, 2022
Mooseman
2002 Trailblazer 2WD/AWD/4HI and 4LO
movietvet
Dec 28, 2022
Replies
3
Views
564
Dec 28, 2022
movietvet
New here and new 2002 TB to me
movietvet
Dec 21, 2022
Replies
12
Views
764
Dec 27, 2022
movietvet
R
Oil pressure from 0 to 50 until engine warmed 06 Enovy 135k miles
Robmoo
Dec 21, 2022
Replies
5
Views
638
Dec 23, 2022
Mooseman
S
Rough Idle | No Codes
Scry0402
Dec 15, 2022
Replies
3
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904
Dec 15, 2022
Scry0402
S
NEED HELP
Stick Dipstick!
l008com
Jul 24, 2019
Replies
38
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6K
Dec 7, 2022
Mooseman
P
Throttle Position %?
PLAT515
Nov 26, 2022
Replies
27
Views
2K
Dec 3, 2022
PLAT515
P
That buttery smooth engine after an oil change never lasts
l008com
Nov 4, 2022
Replies
9
Views
1K
Nov 18, 2022
l008com
C
Fluid Service interval for Transfer case?
c good
Nov 13, 2022
Replies
3
Views
458
Nov 14, 2022
c good
C
Need Recommendations for Shop to do Engine Swap
5tjss
Oct 27, 2022
Replies
5
Views
552
Oct 27, 2022
5tjss
Rough Idle
Miked
Oct 23, 2022
Replies
5
Views
798
Oct 26, 2022
TequilaWarrior
T
B
2004 envoy 4.2 engine lost oil
Ben4.2
Oct 19, 2022
Replies
2
Views
487
Oct 20, 2022
Ben4.2
B
C
Yellow Dip Stick Dilemma
c good
Oct 13, 2022
Replies
6
Views
745
Oct 16, 2022
c good
C
C
Berryman's Soak number two. Thinking about adding some aeration?
c good
Oct 12, 2022
Replies
3
Views
479
Oct 15, 2022
gmcman
C
Adding ATF to oil....how much and for how many miles?
c good
Oct 11, 2022
Replies
3
Views
569
Oct 13, 2022
Mooseman
X
NEED HELP
AC / Heater Blower working intermittently with dash lights
Xodus989
Oct 5, 2022
Replies
9
Views
823
Oct 9, 2022
Xodus989
X
Gas tank extraction pump recommendations?
JayArr
Aug 13, 2022
Replies
15
Views
1K
Oct 8, 2022
Mooseman
C
Would you put in a new Fuel Pump if it's never been replaced at 190 K miles?
c good
Oct 2, 2022
Replies
5
Views
664
Oct 5, 2022
gmcman
P
Frustration
Phill
Sep 17, 2022
Replies
1
Views
669
Sep 17, 2022
mrrsm
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