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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!
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12.7K
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98 K2500 Suburban won't stay running.
47 minutes ago
someotherguy
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
Threads
490
Messages
6K
Threads
490
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6K
Wiring Help!!
Monday at 4:36 PM
TrillWill
Exhaust
Anything exhaust - from headers cats and pipes to tips.
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978
Messages
11.6K
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978
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Exhaust System Done!
May 7, 2022
Jimmy D
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Tune Up Parts Numbers
supjim12
Dec 22, 2009
2
3
4
Replies
37
Views
57K
Sunday at 11:22 PM
Erik the Awful
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
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28
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273
Views
288K
May 5, 2022
PlayingWithTBI
Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
182
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184
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2K
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279K
Apr 29, 2022
1997
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
6
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8
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79
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98K
Apr 15, 2022
PM18S4
P
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
4
5
6
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51
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24K
Jan 7, 2022
Erik the Awful
Sticky
GMT400 History
Greg
Mar 16, 2010
22
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24
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235
Views
279K
Dec 6, 2021
mars2878
M
Sticky
How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
4
5
6
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54
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144K
Oct 28, 2021
Schurkey
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
7
8
9
Replies
86
Views
73K
Jun 7, 2021
HotWheelsBurban
Sticky
Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
2
3
Replies
25
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66K
May 23, 2021
Cisco
Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
11
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13
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123
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100K
Apr 12, 2021
Pinger
D
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The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
2
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4
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33
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211K
Apr 5, 2021
bhopthewelder
B
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How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
15
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17
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169
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133K
Mar 21, 2021
duallburb
Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
18
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20
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199
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250K
Aug 25, 2020
PlayingWithTBI
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
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3
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23
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40K
Feb 28, 2020
dAT OBS
C
How does one remove the electric AIR system in a 1998 Tahoe?
Calvo
Apr 20, 2022
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3
Replies
21
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745
34 minutes ago
Andrews98
A
Alternators
98 Nitro
Monday at 8:50 PM
Replies
9
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188
Yesterday at 10:47 PM
Kran
K
‘97 5.7 Auto Dress Up
97SWBCHEVY
May 11, 2022
Replies
6
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375
Yesterday at 7:06 PM
L31MaxExpress
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A
What to prepare for before I rip into engine....
Archaic2021
Friday at 10:13 AM
2
3
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27
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730
Yesterday at 3:15 PM
Pinger
W
Holley efi and speedometer
Wgrainy
Yesterday at 12:46 PM
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0
Views
47
Yesterday at 12:46 PM
Wgrainy
W
I
Valve spring upgrade on 810 heads?
International47
Yesterday at 12:11 AM
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2
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90
Yesterday at 9:13 AM
International47
I
J
AC hose help for 88 GMC 1500
jcain226
Sunday at 11:56 PM
Replies
6
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184
Yesterday at 2:58 AM
Schurkey
Upgraded Fuel Pump for 1990 SCSB 5.7
SuperSpore
Monday at 12:36 AM
Replies
8
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198
Yesterday at 1:12 AM
SuperSpore
A
98 C1500 Vacuum Hose
AlexHoopes
Feb 5, 2021
Replies
5
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678
Monday at 11:10 PM
carnerd3000
C
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What tune up parts do you use on your tbi engine?
Shannon400
May 4, 2022
2
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13
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735
Monday at 10:38 PM
TreeGeared
Street-able NA 454 7.4L build
Amsterdamned96
Saturday at 6:21 PM
2
Replies
11
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383
Monday at 9:07 PM
Frank Enstein
C
New Oil Leak at Radiator
cc333
Sunday at 8:44 PM
2
Replies
10
Views
227
Monday at 4:04 PM
Schurkey
One Backfire then Stumble and surge issues
ingrammc
Thursday at 9:31 PM
Replies
7
Views
226
Monday at 12:31 PM
ingrammc
C
Engine Wiring Harnesses Randomly Popping Loose?
cc333
May 11, 2022
2
3
Replies
21
Views
590
Monday at 12:11 PM
udidwht
U
D
99 completely stock 454 upgrades
dontworryboutit
Thursday at 1:55 AM
2
3
Replies
20
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742
Monday at 11:34 AM
thebigcar
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