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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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New to gm stuff
Today at 12:49 AM
HawkDsl
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
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596
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7.3K
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596
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Johns custom wiring
Monday at 11:51 PM
RDF1
Exhaust
Anything exhaust - from headers cats and pipes to tips.
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Header mufflers
37 minutes ago
spong Bob
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GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
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19
20
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197
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18K
Monday at 10:24 PM
RichLo
Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
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337K
Monday at 9:32 AM
Erik the Awful
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
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6
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58
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4K
Nov 2, 2023
Scooterwrench
Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
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36
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8K
Oct 31, 2023
NMNorsse
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Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
6
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72
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58K
Oct 2, 2023
L31MaxExpress
Sticky
How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
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18
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171
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142K
Sep 23, 2023
Casey916
Sticky
Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
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3
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26
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71K
Aug 28, 2023
L31MaxExpress
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
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11
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106
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193K
Aug 15, 2023
Zelda
Z
Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
19
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202
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283K
Jul 10, 2023
mwilliams55555
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
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33
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47K
Jul 3, 2023
GoToGuy
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How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
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55
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Jun 20, 2023
Illbedipped
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The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
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238K
Mar 12, 2023
jpcedotal
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GMT400 History
Greg
Mar 16, 2010
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245
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314K
Feb 27, 2023
Will Fuller
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Intake Gasket Replacement
Ginger
Dec 4, 2009
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115K
Dec 9, 2022
mary7654
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Tune Up Parts Numbers
supjim12
Dec 22, 2009
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May 15, 2022
Erik the Awful
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ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
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May 5, 2022
PlayingWithTBI
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
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9
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82K
Jun 7, 2021
HotWheelsBurban
S
93 Yukon Lugs trying to go from 4th gear lockup to 3rd
scott2093
Today at 9:30 AM
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4
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44
Today at 10:04 AM
PWC Repair
S
Engine knocks when ambient temps around freezing or below
sneakingfart
Today at 9:56 AM
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22
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sneakingfart
S
Problem with temperature gauge
97silverdoe
Monday at 6:49 PM
2
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10
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204
Today at 8:55 AM
JeremyNH
J
Cam advice
GMCBurb99
Yesterday at 2:15 PM
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6
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129
Today at 7:42 AM
GMCBurb99
'97 C1500 Power Steering Parts Selection (EVO Delete)
df2x4
Yesterday at 10:00 AM
2
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12
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181
Today at 4:21 AM
df2x4
A
94 Yukon 350 Idle issues and Loss of power.
AllStrobedUp
Nov 10, 2023
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34
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1K
Yesterday at 9:59 PM
Schurkey
Z
Full throttle problem
ZSC-114
Friday at 12:06 AM
2
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11
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343
Yesterday at 9:52 PM
ZSC-114
Z
P
Question about 7.4l Oil Filter
perfect777
Yesterday at 7:18 AM
Replies
8
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152
Yesterday at 8:39 PM
fisher
F
Hesitation completey at a loss
Jksconny
Nov 21, 2023
2
3
4
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34
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1K
Yesterday at 8:00 PM
Russ B
R
1989 C1500, EGR, Headers Question
FullBlowncustoms
Sep 15, 2023
9
10
11
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109
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4K
Yesterday at 4:35 PM
Scooterwrench
Radiator shroud hardware?
454cid
Nov 21, 2023
2
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15
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327
Yesterday at 4:26 PM
GoToGuy
Power steering fluid suggestion
giaguaro
Nov 19, 2023
2
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18
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480
Yesterday at 3:05 PM
someotherguy
TBI Rebuild Services
fancyTBI
Nov 21, 2023
2
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16
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741
Yesterday at 1:30 PM
classman
C
error 45 "LOW AIR" 1989 350 tbi
giaguaro
Nov 11, 2023
2
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13
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278
Yesterday at 1:07 PM
Pinger
M
Strange white smoke exhaust
missouritig
Jan 23, 2023
2
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15
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2K
Yesterday at 12:55 PM
Schurkey
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