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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
1.2K
Messages
18.4K
Threads
1.2K
Messages
18.4K
S
12200411 PCM swap for 1996 to 2000 GMT400 trucks
Yesterday at 11:41 PM
Supercharged111
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
Threads
628
Messages
7.8K
Threads
628
Messages
7.8K
Flywheel/flexplate identification?
27 minutes ago
RDF1
Exhaust
Anything exhaust - from headers cats and pipes to tips.
Threads
1.1K
Messages
13.6K
Threads
1.1K
Messages
13.6K
Dynomax universal ultra flow 17519
Yesterday at 1:31 PM
RDF1
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The Stupid Engine Questions Thread
Mike
Dec 3, 2009
205
206
207
Replies
2K
Views
360K
Yesterday at 8:40 AM
Erik the Awful
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
11
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13
Replies
126
Views
227K
Saturday at 2:14 PM
rebelyell
R
Sticky
GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
28
29
30
Replies
295
Views
29K
Friday at 4:21 PM
Bob2650
B
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
10
11
12
Replies
112
Views
70K
Feb 24, 2024
rebelyell
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Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
3
4
5
Replies
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
Replies
28
Views
73K
Dec 27, 2023
pgutier1
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
4
5
6
Replies
58
Views
5K
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
20
21
Replies
202
Views
292K
Jul 10, 2023
mwilliams55555
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
2
3
4
Replies
33
Views
49K
Jul 3, 2023
GoToGuy
Sticky
How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
4
5
6
Replies
55
Views
158K
Jun 20, 2023
Illbedipped
D
Sticky
The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
2
3
4
Replies
35
Views
246K
Mar 12, 2023
jpcedotal
Sticky
GMT400 History
Greg
Mar 16, 2010
23
24
25
Replies
245
Views
324K
Feb 27, 2023
Will Fuller
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Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
11
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13
Replies
124
Views
119K
Dec 9, 2022
mary7654
M
S
Sticky
Tune Up Parts Numbers
supjim12
Dec 22, 2009
2
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4
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37
Views
65K
May 15, 2022
Erik the Awful
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
26
27
28
Replies
273
Views
325K
May 5, 2022
PlayingWithTBI
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
7
8
9
Replies
86
Views
84K
Jun 7, 2021
HotWheelsBurban
1997 k1500 ext cab
Dakota Hill
Dec 13, 2022
2
3
4
Replies
34
Views
3K
12 minutes ago
Dakota Hill
J
89 2500 crank no start.
Jebadiah
Sunday at 12:00 AM
Replies
9
Views
135
28 minutes ago
Schurkey
Famous Fuel Pressure
OBS_Trash
Feb 26, 2024
2
3
Replies
29
Views
2K
Yesterday at 11:20 PM
tinfoil_hat
1995 Tbi 350. Runs for 30 seconds then dies. Feels rough.
Noah1167
Mar 12, 2024
2
Replies
13
Views
437
Yesterday at 11:14 PM
Schurkey
What makes these trucks destroy distributor caps/rotors?
redfishsc
Oct 7, 2018
8
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10
Replies
96
Views
35K
Yesterday at 10:40 PM
99xcss4
S
Problem child
Spenj0rk
Yesterday at 4:52 PM
Replies
7
Views
107
Yesterday at 10:04 PM
Drunkcanuk
Hey Guys I Need Help Quick
Nick88
Friday at 7:33 AM
5
6
7
Replies
69
Views
1K
Yesterday at 10:03 PM
Nick88
K
New 95 k1500 owner.
Kajunchevy
Yesterday at 8:33 PM
Replies
5
Views
73
Yesterday at 9:04 PM
SUBURBAN5
9
Timing randomly drops 4-8 degrees
95 Tahoe
Saturday at 9:51 AM
2
Replies
19
Views
397
Yesterday at 8:34 PM
95 Tahoe
9
Ignition coil/ overheating
landonoverton1955
Sunday at 7:03 PM
Replies
5
Views
95
Yesterday at 7:35 PM
thinger2
J
350 5.7 TBI Fuel Pressure Issues
joep123
Jul 12, 2020
2
Replies
18
Views
21K
Yesterday at 7:11 PM
Mitchell93
B
Having a bad issue with my 5.7 Vortec
Bigdawg69
Feb 28, 2024
2
Replies
10
Views
496
Yesterday at 5:19 PM
Caman96
S
91 GMT400 kicking my rear!
Spenj0rk
Yesterday at 4:43 PM
Replies
2
Views
70
Yesterday at 5:12 PM
95 Tahoe
9
E
New Engine
extramile71
Sunday at 8:15 PM
Replies
6
Views
138
Yesterday at 4:37 PM
Sean Buick 76
A/C replacement parts?!
95OBSMan
Nov 18, 2023
2
Replies
18
Views
1K
Yesterday at 3:59 PM
monsterwake
M
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