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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
New
2.5K
38.9K
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2.5K
Posts
38.9K
R
Only 3000 miles on oil, but One year old. Change filter too?
Yesterday at 4:41 PM
Redbeard
Drivetrain
New
1.1K
13.3K
Threads
1.1K
Posts
13.3K
NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
New
393
5.2K
Threads
393
Posts
5.2K
Rate this Used Airfilter
Yesterday at 12:20 PM
christo829
LS2 6.0L V8
40
839
Threads
40
Posts
839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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C
Any problem going back to Synthetic Blend oil after full Synthetic?
c good
Apr 27, 2022
Replies
3
Views
724
Apr 28, 2022
littleblazer
J
Transmission trouble?
JackFenimore
Apr 24, 2022
Replies
4
Views
796
Apr 24, 2022
Mooseman
SOLVED!
Bad Wheel Bearings
l008com
Dec 20, 2021
2
Replies
59
Views
5K
Apr 24, 2022
TollKeeper
C
1 Quart in 2600 miles OK?
c good
Apr 3, 2022
Replies
2
Views
499
Apr 3, 2022
Mooseman
C
Codes p0740 p0785 p01860
Chevytruck
Mar 21, 2022
Replies
2
Views
1K
Mar 21, 2022
mrrsm
NEED HELP
Gas Caps
WhiteWolf
Mar 18, 2022
Replies
3
Views
725
Mar 18, 2022
Mooseman
C
I'm going to use the A.C. Delco T.E.C. Liquid or Aerosol?
c good
Feb 17, 2022
Replies
3
Views
1K
Feb 20, 2022
NJTB
N
H
hard start when warm and run-on
htseat2000
Feb 7, 2022
Replies
2
Views
917
Feb 8, 2022
NJTB
N
NEED HELP
Recommended Exhaust Manifold Replacement?
MrShelley
Oct 14, 2021
Replies
15
Views
2K
Jan 30, 2022
Schurkey
J
Do you guys think this ball joint is bad?
JerryIrons
Jan 24, 2022
Replies
9
Views
2K
Jan 28, 2022
flyboy2610
04 tb 4.2 rough jolt when start or turn off.
04trailblazer1991
Jan 1, 2022
Replies
12
Views
1K
Jan 26, 2022
04trailblazer1991
R
NEED HELP
06 Trailblazer EXT 4.2 Engine swap
Rick
Nov 8, 2021
Replies
30
Views
4K
Jan 10, 2022
NJTB
N
So, did I dodge a bullet? (front diff)
Reprise
Jan 2, 2022
Replies
11
Views
1K
Jan 5, 2022
Reprise
N
Novice Attempting TC & Disconnect Service, Help?
NotAMechanic
Nov 1, 2018
2
Replies
76
Views
8K
Jan 3, 2022
NotAMechanic
N
T
Gas Cap
tucker12
Nov 2, 2021
Replies
5
Views
1K
Dec 27, 2021
tucker12
T
C
A.C. Delco Foaming Top End Cleaner....
c good
Nov 14, 2021
Replies
9
Views
5K
Nov 17, 2021
mrrsm
J
5.3 oil pressure
Jh1984oh1
Nov 10, 2021
Replies
4
Views
763
Nov 10, 2021
Jh1984oh1
J
M
P1482 Code- AFTER replacing Clutch fan
Mike
Apr 8, 2012
Replies
10
Views
25K
Nov 10, 2021
filthyfingers
S
Low coolant temperature
santon
Oct 22, 2021
Replies
10
Views
1K
Nov 8, 2021
santon
S
C
2002 cylinder liner failure? Just curious.
c good
Nov 1, 2021
Replies
9
Views
776
Nov 2, 2021
Mooseman
Rough idle when first started
gmcman
Oct 24, 2021
Replies
20
Views
2K
Oct 28, 2021
Mooseman
5.3 swap again.....
Yeagamyster04
Oct 9, 2021
Replies
19
Views
1K
Oct 19, 2021
Yeagamyster04
S
Cruising good only about 1.5 miles then she cuts off.
Sprung Monkey
Apr 14, 2021
2
Replies
59
Views
5K
Oct 17, 2021
Martyelzz4
H
2006 trailblazer rear a/c line replacement
htseat2000
Oct 8, 2021
Replies
1
Views
380
Oct 8, 2021
Mooseman
C
ATS CRO 505....anyone tried this stuff?
c good
Sep 19, 2021
Replies
4
Views
5K
Sep 20, 2021
Mooseman
C
Starting routine. Is this normal?
c good
Sep 13, 2021
Replies
6
Views
805
Sep 19, 2021
c good
C
P0506 code
flyboy2610
Sep 18, 2021
Replies
0
Views
1K
Sep 18, 2021
flyboy2610
A
What exhaust makes the 4.2 sound more like the 6.0
andy702252
Jan 31, 2012
2
Replies
46
Views
9K
Sep 17, 2021
CptFrito
C
Rear diff assembly: used or remanufactured?
6716
Sep 9, 2021
Replies
8
Views
2K
Sep 10, 2021
TJBaker57
T
Not the standard shift cable problem
Tinker
Aug 29, 2021
Replies
14
Views
2K
Sep 10, 2021
Tinker
T
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