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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
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38.9K
R
Only 3000 miles on oil, but One year old. Change filter too?
Today 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
Today 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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NEED HELP
4x4 Working strange
Sn1perdeath
Aug 27, 2021
Replies
25
Views
2K
Sep 10, 2021
chris68369
C
4wd Axle Disconnect...Replace or Repair
BanditGTP
Mar 16, 2020
Replies
27
Views
5K
Sep 8, 2021
chris68369
C
C
Plastic Dip stick end a problem?
c good
Sep 5, 2021
Replies
2
Views
664
Sep 7, 2021
c good
C
C
Marvel Mystery Oil worth a try? Roller cam follower ticking.
c good
Sep 1, 2021
Replies
5
Views
1K
Sep 5, 2021
chris68369
C
M
Oil Pressure Gage
Mektek
Jul 1, 2019
2
Replies
59
Views
10K
Sep 3, 2021
gmcman
C
How long should I let the oil pick up soak in Berryman's?
c good
Aug 27, 2021
Replies
22
Views
2K
Aug 31, 2021
Mooseman
C
I want to add a real oil pressure guage. Suggestions please.
c good
Aug 28, 2021
Replies
3
Views
978
Aug 30, 2021
Mektek
M
O
No fuel Pressure
OIFVet0326
Aug 21, 2021
Replies
21
Views
2K
Aug 24, 2021
Mooseman
are this readings high? ltft stft , and mpg , i have high fuel consumption
yazan
Aug 7, 2021
Replies
14
Views
2K
Aug 17, 2021
Mooseman
J
Transmission line change project notes
JerryIrons
Jul 9, 2021
Replies
9
Views
997
Aug 15, 2021
matermark
T
Locked
SOLVED!
Cylinder Head and timing chain headaches.
tucker12
May 20, 2020
2
3
Replies
96
Views
13K
Aug 13, 2021
Mooseman
T
Temp Transmission Cooler Line Question
tak13
Feb 4, 2020
Replies
30
Views
3K
Aug 10, 2021
matermark
R
NEED HELP
Boiling sound from radiator overflow
Rick
Aug 4, 2021
Replies
7
Views
1K
Aug 4, 2021
Rick
R
B
NEED HELP
Question 🤔
Bronsonc1856
Aug 4, 2021
Replies
2
Views
458
Aug 4, 2021
Redbeard
R
Stabilitrak Error?
psa55
Jan 19, 2021
Replies
9
Views
2K
Aug 4, 2021
psa55
Z
Change Spark Plugs 05 Trailblazer
zip7111
Jul 28, 2021
Replies
11
Views
3K
Jul 29, 2021
JerryIrons
J
S
I may have ruined the oil pump?
Sprung Monkey
Jun 25, 2021
Replies
36
Views
4K
Jul 28, 2021
Sprung Monkey
S
C
4L60E transmission without Tow/Haul vs. 4L60E with Tow/Haul?
c good
Jul 19, 2021
Replies
5
Views
4K
Jul 21, 2021
c good
C
C
4.2 keeps losing oil pressure
chuey_316
Feb 4, 2021
2
3
4
Replies
133
Views
13K
Jul 18, 2021
chuey_316
C
F
P1681 TPS error code
Fatty2004
Jul 14, 2021
Replies
7
Views
6K
Jul 15, 2021
mrrsm
$1700 A/C quote to replace the evaporator under the dash
6716
May 26, 2021
Replies
16
Views
2K
Jul 6, 2021
6716
C
O2 sensor replacement
cretecrawler
Jul 1, 2021
Replies
6
Views
1K
Jul 5, 2021
cretecrawler
C
M
NEED HELP
2003 Trailblazer transmission
mudpaws672
Jun 30, 2021
Replies
6
Views
774
Jul 2, 2021
JimInRadfordVA
C
Strangest drive train noise w/ video
Clooney
Jun 25, 2021
Replies
11
Views
1K
Jun 29, 2021
Clooney
C
J
Does the 4.2 platform have an INERTIA CUTOFF SWITCH ?
jhenry999
Apr 20, 2021
Replies
7
Views
1K
Jun 24, 2021
Mooseman
TCM LOCATION
John Koda
Jun 21, 2021
Replies
4
Views
5K
Jun 21, 2021
Chickenhawk
Oil Filter Removal Trick?
l008com
May 13, 2021
Replies
12
Views
2K
Jun 4, 2021
JayArr
K
ac refill for short wheelbase ?
KEEBZ489
May 30, 2021
Replies
3
Views
614
May 31, 2021
Mooseman
C
Another Dex Cool Question. Did I mess up?
c good
May 15, 2021
Replies
12
Views
1K
May 20, 2021
littleblazer
S
I’d like to test compression on the 07 5.3 V8
Sprung Monkey
May 17, 2021
Replies
10
Views
5K
May 19, 2021
Sprung Monkey
S
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