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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 5.3L V8
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FAQ: Vortec 5.3L V8
Mooseman
May 3, 2017
Replies
0
Views
8K
May 3, 2017
Mooseman
Normal threads
M
Persistent p0172 and p0175
MBS1994
Aug 5, 2020
4
5
6
7
8
Replies
281
Views
26K
Jan 31, 2021
MBS1994
M
"Hoping... For Loping..."
mrrsm
Apr 2, 2018
2
3
Replies
119
Views
27K
Feb 13, 2023
mrrsm
0
miles per gallon with the v8
06envoydenali
Mar 21, 2013
2
3
Replies
94
Views
9K
Dec 1, 2014
02 WS6 TA
I
Misfire on Cylinder 7
Inferno333
Jan 21, 2016
2
3
Replies
82
Views
21K
Mar 20, 2016
gmcman
How to disable AFM/DOD at no cost
Mooseman
Mar 26, 2015
2
Replies
79
Views
170K
Jul 6, 2023
Mooseman
Replacing my 5.3L, what to look for?
subssonic
Aug 6, 2014
2
Replies
72
Views
5K
Aug 28, 2014
TxMaverick75
T
N
Collapsed lifter.......
New Envoy
Feb 14, 2017
2
Replies
71
Views
14K
Jul 21, 2017
JimB204
J
Miss-fire on Cylinder 5
l008com
Jul 16, 2023
2
Replies
58
Views
2K
Sep 8, 2023
l008com
C
Engine trouble. Need help.
ch41
Oct 24, 2012
2
Replies
57
Views
15K
Jan 27, 2013
mrphoenix80
M
Looking for another!
tsmith1156
Apr 9, 2020
2
Replies
52
Views
6K
Apr 17, 2020
tsmith1156
What do you get from a Resonator Delete?
l008com
Aug 13, 2016
2
Replies
51
Views
28K
Dec 7, 2016
Derrick Rucker
Oil consumption report
C-ya
Jul 26, 2014
2
Replies
49
Views
6K
Jan 7, 2016
mrrsm
Problems pulling in to parking spots....
GMDUDE2003
Jun 24, 2013
2
Replies
43
Views
5K
Apr 6, 2014
GMDUDE2003
I
5.3 vortec envoy random misfire/ rough idle
ImmortalTechnique
Dec 28, 2018
2
Replies
40
Views
16K
Jul 24, 2022
coolasice
C
Very Noisy AC Compressor
l008com
Aug 15, 2016
Replies
39
Views
8K
Aug 18, 2019
l008com
Collapsed a lifter and feeling out the options
smitty5150
Apr 27, 2015
Replies
38
Views
7K
May 5, 2015
smitty5150
Dumb truck starts every time!!
AWD V8
May 7, 2015
Replies
37
Views
2K
May 20, 2015
AWD V8
I
Oil Pressure Dropping and a Misfire on #1
Inferno333
Nov 1, 2015
Replies
36
Views
18K
Jan 21, 2016
Inferno333
I
0
Cold air intake
06envoydenali
Aug 1, 2012
Replies
35
Views
7K
Mar 16, 2013
deepblue
Valve-train Noise Questions
l008com
Feb 28, 2017
Replies
34
Views
8K
Oct 15, 2017
Reprise
I
Still have issues at idle
Inferno333
Jun 7, 2016
Replies
34
Views
11K
Jul 6, 2016
gmcman
Engine replacement
xxxotiknightz
Dec 16, 2011
Replies
34
Views
13K
Jan 8, 2012
Fire06
F
J
SOLVED!
Excessive STFT Issue
Jkb242
Jan 19, 2020
Replies
33
Views
35K
Jul 25, 2023
aslusser
A
J
My MPG's dropped off a cliff
Jkust
Dec 18, 2012
Replies
32
Views
4K
Jan 3, 2013
lairdt
L
Evap Failing to get I/M Readiness-No codes
Mooseman
Nov 28, 2014
Replies
30
Views
39K
Jul 2, 2019
j-bone
J
A
5.3 v8 w/ 3.73 ratio
alltimeqb
Dec 28, 2011
Replies
30
Views
3K
Aug 2, 2012
mnypitTBEXT
M
K
No ground to coils.
Khaan86
Jul 30, 2014
Replies
30
Views
17K
Sep 18, 2014
Khaan86
K
B
5.3 oil usage
Booner
Mar 20, 2013
Replies
29
Views
30K
Nov 20, 2013
northcreek
Periodic rough idle, codes within thread. Plz help!
NT1078
Mar 21, 2019
Replies
28
Views
4K
May 4, 2019
NT1078
E
How much oil can a 5.3 LM7 burn
Enroute
Jul 23, 2020
Replies
27
Views
9K
Oct 7, 2020
mrrsm
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