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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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19K
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S
99 L29 454 build
Friday at 10:54 PM
Scottm
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
Threads
634
Messages
7.9K
Threads
634
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7.9K
How To: Ditch EFI and keep TBI PCM for 4L60E Control.
Yesterday at 6:24 PM
L31MaxExpress
Exhaust
Anything exhaust - from headers cats and pipes to tips.
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13.9K
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E
Long tube headers
Friday at 12:14 PM
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Water Pump Relacement
Ginger
Dec 4, 2009
7
8
9
Replies
86
Views
85K
Jun 7, 2021
HotWheelsBurban
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
26
27
28
Replies
273
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329K
May 5, 2022
PlayingWithTBI
S
Sticky
Tune Up Parts Numbers
supjim12
Dec 22, 2009
2
3
4
Replies
37
Views
66K
May 15, 2022
Erik the Awful
D
Sticky
The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
2
3
4
Replies
35
Views
250K
Mar 12, 2023
jpcedotal
Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
207
208
209
Replies
2K
Views
370K
Apr 28, 2024
FighterOfTheFoo
Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
3
4
5
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41
Views
13K
Feb 16, 2024
95OBSMan
Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
19
20
21
Replies
202
Views
296K
Jul 10, 2023
mwilliams55555
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
2
3
4
Replies
33
Views
50K
Jul 3, 2023
GoToGuy
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
4
5
6
Replies
59
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6K
Apr 1, 2024
Scooterwrench
Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
11
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13
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124
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120K
Dec 9, 2022
mary7654
M
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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159K
Jun 20, 2023
Illbedipped
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
10
11
12
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113
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74K
Mar 26, 2024
rebelyell
R
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How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
16
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18
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171
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145K
Sep 23, 2023
Casey916
Sticky
GMT400 History
Greg
Mar 16, 2010
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245
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328K
Feb 27, 2023
Will Fuller
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Sticky
GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
30
31
32
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314
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33K
Wednesday at 11:07 AM
Bob2650
B
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Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
2
3
Replies
28
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73K
Dec 27, 2023
pgutier1
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
13
14
15
Replies
144
Views
244K
Apr 20, 2024
BeautyandtheBeast
“Police Issue” Vortec Heads?
NightRunner
May 13, 2018
2
Replies
15
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4K
May 19, 2018
NightRunner
“Lag”?
tooturntdad
Oct 29, 2021
2
3
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24
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3K
Dec 13, 2021
stutaeng
S
“Duramax fan”
Slade88
Sep 16, 2022
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25
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11K
Nov 16, 2023
Orpedcrow
A
‘99 on the road finally, now rattles in first
Aholter90
Sep 9, 2022
Replies
7
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1K
Sep 19, 2022
HotWheelsBurban
A
‘99 K2500 died and won’t restart
Aholter90
Jan 27, 2023
2
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13
Views
3K
Mar 3, 2024
Road Trip
‘97 built 5.7 w 411 swap to tuner & dyno concerns
97SWBCHEVY
Sep 18, 2023
Replies
1
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797
Sep 18, 2023
L31MaxExpress
‘97 5.7 Vortec - ̶n̶o̶t̶ your typical crank no start
wyn97
Oct 31, 2021
2
3
Replies
29
Views
30K
Nov 2, 2021
wyn97
‘97 5.7 automatic backfire go BOOM!
97SWBCHEVY
Sep 22, 2021
2
Replies
12
Views
2K
Sep 24, 2021
Pinger
‘97 5.7 Auto Dress Up
97SWBCHEVY
May 11, 2022
Replies
6
Views
2K
May 17, 2022
L31MaxExpress
‘95 K1500 air conditioning system Q.
any4xx
Mar 13, 2023
Replies
4
Views
1K
May 15, 2023
Dariusz Salomon
‘95 5.7 runs poorly when warm. I’m reducing myself to being a parts-changer.
any4xx
Mar 31, 2023
2
3
4
Replies
32
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5K
Apr 16, 2023
any4xx
‘94 Silverado A/C INOP ?
highwaystar
Apr 15, 2021
Replies
2
Views
466
Apr 15, 2021
Schurkey
T
‘94 350 TBI milky oil
Todd Savage
Dec 30, 2017
2
Replies
11
Views
7K
Jan 1, 2018
Todd Savage
T
J
‘93 4.3 oil adapter leak
Jfavorito
Jan 25, 2020
Replies
7
Views
885
Jan 26, 2020
L31MaxExpress
N
‘92 5.7 tbi stalls after tach goes crazy
Ninety-two
Jun 13, 2023
2
3
Replies
22
Views
3K
Jun 23, 2023
Ninety-two
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