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2002 - 2009 TrailBlazer/Envoy Tech
02-09 Vortec 5.3L V8 Engine and Drivetrain
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OEM Issues
Original Equipment Repairs and/or Problems
8.1K
5.3M
4 d ago
8.1K
5.3M
4 d ago
Air Induction
Performance Air Intake/Air Induction Modifications
826
593K
Aug 1, 2019
826
593K
Aug 1, 2019
Exhaust Mods
Performance Exhaust Modifications
1.2K
2.2M
6 mo ago
1.2K
2.2M
6 mo ago
Engine Tunes/Mods
Performance Engine Tuning/Engine Modifications
3.1K
2.1M
3 d ago
3.1K
2.1M
3 d ago
Transmission Mods
Performance Transmission Modifications
710
627K
12 d ago
710
627K
12 d ago
4x4 Drivetrain
4x4 Repairs & Problems
2.7K
1.8M
11 h ago
2.7K
1.8M
11 h ago
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Jman423
Mar 5, 2008
Locked
0
9K
Mar 5, 2008
by
Jman423
How to immortalize a 04 5.3
5.3EXT
5 d ago
0
88
5 d ago
by
5.3EXT
S
Engine Rattling After Sudden Deceleration
STSCowboy
7 d ago
0
73
7 d ago
by
STSCowboy
T
Need to Overfill Engine Oil to Make Engine Rattle Go Away
tony17112acst
12 mo ago
3
420
7 d ago
by
STSCowboy
06-07 5.3 Trailblazer
HotRod76
15 d ago
0
68
15 d ago
by
HotRod76
Transmission slip
Giblues
2 mo ago
1
125
2 mo ago
by
miketexas
Water pump change
DenaliDarb80
2 mo ago
2
139
2 mo ago
by
mddombrowski
05 Envoy XL 5.3L P0001 P0449
kkeaton
5 mo ago
14
415
3 mo ago
by
kkeaton
T
Fuel lines! Help...
Turk2
4 mo ago
2
390
4 mo ago
by
Turk2
S
2006 Envoy XL Denali Sluggish Performance
STSCowboy
5 mo ago
10
367
4 mo ago
by
chem_man
S
Under Powered or Issue?
SouthSeaPirate
5 mo ago
1
118
5 mo ago
by
Ravalli Surfer
Ecu/Tcu upgrade tune with dual spal fans
Aaron3Jefferson
7 mo ago
0
161
7 mo ago
by
Aaron3Jefferson
Why does my 06 ls trailblazer 5.3 keep throwing random codes
Miketizzl
7 mo ago
3
273
7 mo ago
by
Ravalli Surfer
Codes
Miketizzl
7 mo ago
0
109
7 mo ago
by
Miketizzl
T
2006 Envoy - Strange Throttle Problems
tomkatohio
Jan 22, 2020
3
489
7 mo ago
by
tomkatohio
G
7E8 / 7EA codes 2007 9-7x with a 5.3
goracin442
7 mo ago
3
510
7 mo ago
by
Vega_TB
08 Envoy Denali turns and turns without starting
Aaron3Jefferson
7 mo ago
0
132
7 mo ago
by
Aaron3Jefferson
M
Fuel line part number?
Mjmcfarl3
9 mo ago
17
640
8 mo ago
by
Vega_TB
N
aftermarket support
nieblas
10 mo ago
0
305
10 mo ago
by
nieblas
High idle, and low power
Stonemason
Oct 23, 2019
2
390
11 mo ago
by
EnvoyBoy2004
03 tb with 5.3 crank no start
Madmike2217
Feb 18, 2020
1
278
11 mo ago
by
dextrob
HELP! Trouble Starting!!
WhiteyXD
12 mo ago
2
247
12 mo ago
by
tinmanwpk
Swap a 04 envoy 5.3 into a 06 envoy 5.3 for dod delete
Lschevy
Feb 13, 2020
0
295
Feb 13, 2020
by
Lschevy
Help
Soundhead88
Jan 25, 2020
0
157
Jan 25, 2020
by
Soundhead88
J
Knocking and misfire, noone can find issue.
jimf81
Jan 23, 2020
5
368
Jan 25, 2020
by
Ravalli Surfer
S
2006 Envoy Denali 5.3L V8 Starter Change in an Hour!!!
STSCowboy
Jan 23, 2020
0
1K
Jan 23, 2020
by
STSCowboy
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02-09 Vortec 5.3L V8 Engine and Drivetrain
Q&A forum for engine and drivetrain repairs/modifications/tuning.
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