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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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18.5K
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1.2K
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12200411 PCM swap for 1996 to 2000 GMT400 trucks
52 minutes ago
L31MaxExpress
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
Threads
629
Messages
7.8K
Threads
629
Messages
7.8K
J
Carb swapped ‘97 vortec - SUCCESS!!!
Monday at 2:25 PM
jockito
Exhaust
Anything exhaust - from headers cats and pipes to tips.
Threads
1.1K
Messages
13.7K
Threads
1.1K
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13.7K
Long tubes
Yesterday at 11:36 AM
revmatcher
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Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
206
207
208
Replies
2K
Views
362K
Yesterday at 9:27 PM
1990 305
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
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12
Replies
113
Views
71K
Tuesday at 2:11 PM
rebelyell
R
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
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14
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132
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231K
Tuesday at 8:42 AM
Caman96
Sticky
GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
28
29
30
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297
Views
30K
Mar 21, 2024
bretcopsey
Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
3
4
5
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41
Views
12K
Feb 16, 2024
95OBSMan
Sticky
Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
2
3
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28
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73K
Dec 27, 2023
pgutier1
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
4
5
6
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58
Views
6K
Nov 2, 2023
Scooterwrench
Sticky
How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
16
17
18
Replies
171
Views
144K
Sep 23, 2023
Casey916
Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
19
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21
Replies
202
Views
293K
Jul 10, 2023
mwilliams55555
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
2
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4
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33
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49K
Jul 3, 2023
GoToGuy
Sticky
How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
4
5
6
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55
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158K
Jun 20, 2023
Illbedipped
D
Sticky
The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
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35
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247K
Mar 12, 2023
jpcedotal
Sticky
GMT400 History
Greg
Mar 16, 2010
23
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25
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245
Views
325K
Feb 27, 2023
Will Fuller
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Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
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124
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119K
Dec 9, 2022
mary7654
M
S
Sticky
Tune Up Parts Numbers
supjim12
Dec 22, 2009
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37
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65K
May 15, 2022
Erik the Awful
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
26
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273
Views
326K
May 5, 2022
PlayingWithTBI
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
7
8
9
Replies
86
Views
84K
Jun 7, 2021
HotWheelsBurban
Chasing down cyl. 2 misfire (P0302)
alvaroemg
Mar 17, 2024
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4
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30
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612
25 minutes ago
alvaroemg
Holley Sniper EFI?
jrfinchen1
May 24, 2022
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23
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10K
37 minutes ago
Scooterwrench
A
Kill switch, 1997 k1500 pickup
aj_08
Tuesday at 9:12 PM
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5
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41
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890
45 minutes ago
Road Trip
CEL, P0307. Pulled the plug and looks like oil is on my sparkplug. What would cause oil to be on sparkplugs?
PrestonJay12
Yesterday at 9:39 PM
2
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10
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160
52 minutes ago
PrestonJay12
MAF - Parts Cannon Story - Paying it Forward
OBS_Trash
Mar 20, 2024
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3
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29
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1K
Today at 4:41 PM
454cid
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fuel pressure reading.
hi54lofi
Jan 24, 2024
Replies
8
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533
Today at 3:43 PM
Schurkey
Unhooked parts in my engine bay.
r32flow
Today at 10:14 AM
Replies
7
Views
124
Today at 3:21 PM
1998_K1500_Sub
D
All this work to get it right and it's still a work in progress....What's next?
Dajain
Yesterday at 6:35 PM
Replies
1
Views
71
Today at 1:56 PM
Schurkey
Flowtie
L31MaxExpress
Sep 15, 2023
Replies
9
Views
650
Today at 1:47 PM
KennyP
5.3 clean dirty oil
Jksconny
Today at 12:58 AM
2
3
Replies
28
Views
339
Today at 1:16 PM
df2x4
S
1993 Yukon crate motor hydraulic roller lifter cleaning and adjustment journey - (Solved)
scott2093
Feb 19, 2024
22
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24
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231
Views
9K
Today at 1:08 PM
someotherguy
Wanted: Daily driver upgrades/mods suggestions
Grandpa_truck
Tuesday at 8:01 PM
2
Replies
13
Views
371
Today at 10:08 AM
Grandpa_truck
1992 7.4 Oil?
BIGBLOCK92
Sep 18, 2023
8
9
10
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94
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5K
Today at 9:30 AM
someotherguy
B
Ca smog legal 383 stroker
braidenserpa
Mar 20, 2024
2
3
4
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34
Views
946
Today at 9:17 AM
braidenserpa
B
C
Engine Idles Unevenly and Almost Stalls When Cold
cc333
Feb 5, 2024
3
4
5
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49
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3K
Today at 6:14 AM
termite
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