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Engine Performance + Maintenance
If it's under the hood, its in here.
96+ Vortec Performance + Computer Swaps
If you want to do the 0411 PCM swap or have a 1996+ Vortec motor this is your forum!
Threads
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19K
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1.2K
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L31 Extreme Budget Build
Yesterday at 5:32 PM
L31MaxExpress
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
Threads
635
Messages
7.9K
Threads
635
Messages
7.9K
Z
Intake swap
Yesterday at 9:24 AM
zach_rabey
Exhaust
Anything exhaust - from headers cats and pipes to tips.
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Messages
13.9K
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1.1K
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13.9K
A
Iso long tube headers
Yesterday at 7:44 PM
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Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
207
208
209
Replies
2K
Views
371K
Apr 28, 2024
FighterOfTheFoo
Sticky
GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
30
31
32
Replies
316
Views
33K
Sunday at 9:24 PM
Caman96
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
26
27
28
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273
Views
329K
May 5, 2022
PlayingWithTBI
Sticky
GMT400 History
Greg
Mar 16, 2010
23
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25
Replies
245
Views
328K
Feb 27, 2023
Will Fuller
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Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
19
20
21
Replies
202
Views
296K
Jul 10, 2023
mwilliams55555
Sticky
How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
16
17
18
Replies
171
Views
145K
Sep 23, 2023
Casey916
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
13
14
15
Replies
144
Views
245K
Apr 20, 2024
BeautyandtheBeast
Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
11
12
13
Replies
124
Views
120K
Dec 9, 2022
mary7654
M
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
10
11
12
Replies
113
Views
74K
Mar 26, 2024
rebelyell
R
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
7
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9
Replies
86
Views
85K
Jun 7, 2021
HotWheelsBurban
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
4
5
6
Replies
59
Views
6K
Apr 1, 2024
Scooterwrench
Sticky
How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
4
5
6
Replies
55
Views
160K
Jun 20, 2023
Illbedipped
Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
3
4
5
Replies
41
Views
13K
Feb 16, 2024
95OBSMan
S
Sticky
Tune Up Parts Numbers
supjim12
Dec 22, 2009
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37
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66K
May 15, 2022
Erik the Awful
D
Sticky
The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
2
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35
Views
250K
Mar 12, 2023
jpcedotal
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
2
3
4
Replies
33
Views
50K
Jul 3, 2023
GoToGuy
Sticky
Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
2
3
Replies
28
Views
73K
Dec 27, 2023
pgutier1
V
Poll
What kind of mileage do you get?
Vortec Lover
Oct 10, 2012
99
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101
Replies
1K
Views
106K
May 10, 2017
DerekTheGreat
D
4.3L to ?? swap.
DeCaff2007
Aug 12, 2022
55
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57
Replies
565
Views
41K
Jan 11, 2024
1998_K1500_Sub
My Flat Tappet Cam Wiped Out So I Decided To Go Roller
PlayingWithTBI
Nov 29, 2022
49
50
51
Replies
501
Views
48K
Mar 18, 2024
Moofus02
M
98 chevy 1500 engine issue
Dougm72
Dec 14, 2010
36
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38
Replies
372
Views
47K
Sep 19, 2011
Dougm72
88-94 5.7 Suburban A/C Diagnosis and Tuning
Wildblue19
Aug 6, 2022
32
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34
Replies
337
Views
27K
Mar 23, 2024
1998_K1500_Sub
S
1993 Yukon crate motor hydraulic roller lifter cleaning and adjustment journey - (Solved)
scott2093
Feb 19, 2024
29
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305
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15K
Apr 25, 2024
scott2093
S
D
First real test drive today, after V8 swap.
DeCaff2007
Jan 25, 2024
25
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27
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267
Views
13K
Apr 3, 2024
DeCaff2007
D
Installing an LT1 in a 1997 K1500 SBSS
Tinbender59
Mar 17, 2011
24
25
26
Replies
257
Views
75K
Dec 5, 2012
Tinbender59
My documented TBI-to-Vortec 350 conversion!
jdyates
Jun 21, 2013
23
24
25
Replies
242
Views
104K
Nov 26, 2023
jdyates
I'm out of ideas, guys. (Truck runs like crap no matter what I do).
jdyates
Feb 6, 2013
23
24
25
Replies
240
Views
23K
Feb 20, 2013
oohunter04oo
FastOrange: Stage 2 (Transmission)
FastOrange
Dec 21, 2010
18
19
20
Replies
191
Views
25K
Jun 14, 2011
FastOrange
Better gas mileage and performance.
JoeJoe1993
May 23, 2023
17
18
19
Replies
189
Views
13K
Mar 27, 2024
95Noobie
Bad running after manual swap
JPVortex
Apr 17, 2024
17
18
19
Replies
186
Views
5K
Yesterday at 8:14 PM
JPVortex
Head Swap Options For 5.7L 350 TBI Engine
Majoraslayer
Jan 4, 2024
16
17
18
Replies
179
Views
21K
Apr 15, 2024
rebelyell
R
S
1999 5.7 350 vortec P0304 cylinder 4 misfire
socal k1500
Oct 2, 2023
16
17
18
Replies
174
Views
12K
Apr 22, 2024
socal k1500
S
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