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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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Weird top end knock
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Mooseman
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Torque converter help
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Mooseman
Vortec 5.3L V8
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404
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CARB approved DOD/AFM delete kit
Today at 6:46 PM
spfautsch
LS2 6.0L V8
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839
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Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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Bad starter?
Stuntmanmike1977
May 16, 2025
Replies
13
Views
319
Sunday at 4:42 PM
flyboy2610
C
When does piston slap become a problem?
c good
Apr 19, 2025
Replies
8
Views
508
Saturday at 8:44 PM
c good
C
P
ELM327 to Hexidecimal
Prisoner
Mar 22, 2025
Replies
6
Views
336
Apr 9, 2025
Mooseman
C
O2 sensor replacement
cretecrawler
Jul 1, 2021
Replies
8
Views
2K
Apr 8, 2025
Mooseman
NEED HELP
P0171 on my 04 Trailblazer LT won't go away
ghost_leader07
Sep 24, 2021
2
3
Replies
118
Views
12K
Apr 1, 2025
mrrsm
K
NEED HELP
5.3 vortec long crank
Kgurn1020
Oct 28, 2024
2
Replies
47
Views
3K
Mar 31, 2025
oldfoggie
O
Does it have to learn to idle?
Sqrly
Oct 31, 2024
2
3
4
5
6
Replies
223
Views
10K
Mar 27, 2025
TJBaker57
Another A4WD question - (hard engagment)
Sqrly
Mar 25, 2025
Replies
4
Views
195
Mar 26, 2025
Mooseman
C
17.7 mpg....about right?
c good
Mar 24, 2025
Replies
3
Views
322
Mar 24, 2025
Mooseman
F
P1681 TPS error code
Fatty2004
Jul 14, 2021
Replies
9
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10K
Mar 24, 2025
Mooseman
K
99 4l60e jerking only in lockup
Kowens88
Mar 15, 2025
Replies
2
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276
Mar 17, 2025
Mathoran
T
Transmission sensor?
thalsey45
Feb 27, 2025
Replies
5
Views
344
Mar 4, 2025
budwich
B
T
Thudding noise in rearend Envoy
tiffi221986
Feb 9, 2025
Replies
2
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260
Feb 9, 2025
Mooseman
C
Intake manifold blank port/ nipple. What is it for?
c good
Feb 6, 2025
Replies
4
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436
Feb 9, 2025
azswiss
C
Worth keeping a spare exhaust manifold?
c good
Feb 2, 2025
Replies
5
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373
Feb 2, 2025
Mooseman
Bound to happen sooner or later
Ilikemy3s
Feb 7, 2024
Replies
12
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1K
Jan 25, 2025
Redbeard
R
How to remove the rear gas tank strap
C-ya
May 22, 2019
Replies
10
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5K
Jan 16, 2025
Mooseman
C
Motor Mounts. If they're not leaking, any reason to replace them?
c good
Jan 8, 2025
Replies
2
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446
Jan 8, 2025
mrrsm
C
I have a 2002 Envoy. Replacement Engine options are 02-05 correct?
c good
Jan 5, 2025
Replies
1
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265
Jan 6, 2025
Mooseman
C
How often do you change AC Delco 41-103 plugs?
c good
Jan 3, 2025
Replies
2
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557
Jan 4, 2025
Mooseman
C
Is the Dorman electronic fan clutch decent?
c good
Dec 29, 2024
Replies
1
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253
Dec 30, 2024
Mooseman
C
Do all of our 4.2 I-6 rides have the hole through the oil pan?
c good
Dec 27, 2024
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2
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446
Dec 27, 2024
Mooseman
C
Coolant Gurgle coming from recovery bottle.
c good
Dec 22, 2024
Replies
7
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691
Dec 27, 2024
c good
C
4.2L Dieseling sound
ZD3SF
Nov 13, 2020
Replies
26
Views
4K
Dec 26, 2024
Realism
What does this noise sound like?
gmcman
Nov 10, 2024
Replies
13
Views
1K
Dec 26, 2024
Realism
C
LL8 Rebuild. Any upgrades recommended?
c good
Nov 22, 2024
Replies
3
Views
445
Nov 22, 2024
TJBaker57
Scantool reports Auto while switch says 4Hi
TJBaker57
Nov 4, 2024
Replies
11
Views
650
Nov 15, 2024
TJBaker57
Does your Envoy "Decelerate"? (auto trans)
Sqrly
Oct 31, 2024
Replies
7
Views
677
Nov 13, 2024
Sqrly
S
Frustrating tank drop
Stuntmanmike1977
Oct 19, 2024
Replies
9
Views
827
Oct 30, 2024
Stuntmanmike1977
S
R
NEED HELP
2008 GMC Envoy issue with stalling
rjohnson
Oct 27, 2024
Replies
9
Views
642
Oct 28, 2024
mrrsm
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