Engine Performance + Maintenance

If it's under the hood, its in here.

  1. 96+ Vortec Performance + Computer Swaps

    If you want to do the 0411 PCM swap or have a 1996+ Vortec motor this is your forum!
    655
    Discussions
    7,650
    Messages
    Latest: Black box tuned and spare 411 value BNielsen, Oct 21, 2018 at 3:15 PM

  2. LSX + Carb Swaps

    This section is for info on LSX or carburetor swaps into the OBS trucks.
    344
    Discussions
    4,657
    Messages
    Latest: Turbo LS Swap with A/C GarrettGmc, Oct 22, 2018 at 10:45 PM

  3. Exhaust

    Anything exhaust - from headers cats and pipes to tips.
    758
    Discussions
    9,258
    Messages
    Latest: Headers for a 1992 3500HD 454 Sparkysikes, Oct 23, 2018 at 9:28 AM
Page 1 of 466
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  1. Mike

    The Stupid Engine Questions Thread

    Mike, Dec 3, 2009 ... 105 106 107
    Replies:
    1,060
    Views:
    133,032
    TD Henley
    Oct 23, 2018 at 8:34 PM
  2. shelbyt.67

    ULTIMATE TBI mods stage 1

    shelbyt.67, Jun 28, 2012 ... 22 23 24
    Replies:
    237
    Views:
    165,328
    Fukitol
    Sep 13, 2018
  3. Ginger

    Water Pump Relacement

    Ginger, Dec 4, 2009 ... 5 6 7
    Replies:
    67
    Views:
    32,399
    Jared Jackson
    Aug 28, 2018
  4. Hodges87

    How to Replace oil filter adapter gasket & o-ring

    Hodges87, Dec 14, 2009 ... 3 4 5
    Replies:
    46
    Views:
    91,532
    Chevy blood
    Aug 16, 2018
  5. supjim12

    Tune Up Parts Numbers

    supjim12, Dec 22, 2009 ... 2 3 4
    Replies:
    33
    Views:
    23,848
    Schurkey
    Jul 20, 2018
  6. Greg

    Maintenance: RPO Code Database & Decoder

    Greg, Dec 4, 2009 ... 2 3
    Replies:
    21
    Views:
    15,758
    94burbk1500
    Apr 12, 2018
  7. Ginger

    Intake Gasket Replacement

    Ginger, Dec 4, 2009 ... 6 7 8
    Replies:
    76
    Views:
    48,023
    Wade
    Feb 16, 2018
  8. Bighead38

    Putting A Chip In A TBI Truck

    Bighead38, Dec 3, 2009 ... 12 13 14
    Replies:
    134
    Views:
    118,715
    Bodageta1995
    Feb 15, 2018
  9. Greg

    GMT400 History

    Greg, Mar 16, 2010 ... 18 19 20
    Replies:
    199
    Views:
    159,262
    ThundahBeagle
    Nov 26, 2017
  10. Devs93

    The Ultimate 88-98 Performance Toolbox

    Devs93, Aug 1, 2012 ... 2 3
    Replies:
    25
    Views:
    102,169
    superdave
    Jul 27, 2017
  11. Mike

    LS Swapping and Performance FAQ

    Mike, Aug 3, 2013
    Replies:
    9
    Views:
    13,702
    Fedeleon11
    Sep 24, 2016
  12. monstar_est87

    How to MarkVIII your OBS on a budget..!

    monstar_est87, Apr 30, 2012 ... 14 15 16
    Replies:
    153
    Views:
    77,059
    KrpticKyler
    Jul 30, 2015
  13. 88GMCtruck

    Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)

    88GMCtruck, Apr 14, 2010 ... 2 3
    Replies:
    21
    Views:
    35,620
    txgp17
    Oct 24, 2013
  1. Mitch564

    P0440 Code, out of ideas

    Mitch564, Oct 23, 2018 at 7:18 PM
    Replies:
    2
    Views:
    47
    Mitch564
    Oct 23, 2018 at 10:26 PM
  2. Jdge439

    Intake Manifold HELP

    Jdge439, Oct 21, 2018 at 6:03 PM ... 2
    Replies:
    13
    Views:
    388
    Kran
    Oct 23, 2018 at 8:35 PM
  3. Kobo_Dyger

    4.3L V6 intact manifold upgrade

    Kobo_Dyger, Oct 22, 2018 at 3:09 PM
    Replies:
    5
    Views:
    92
    Kobo_Dyger
    Oct 23, 2018 at 11:40 AM
  4. supermailman

    Just acquired a '95 with the 4.3, year specific issues?

    supermailman, Oct 23, 2018 at 9:32 AM
    Replies:
    0
    Views:
    67
    supermailman
    Oct 23, 2018 at 9:32 AM
  5. Nathanb1488

    98 5.7 L31 to early 5.3 swap Any help appreciated

    Nathanb1488, Oct 22, 2018 at 10:16 AM
    Replies:
    3
    Views:
    135
    Supercharged111
    Oct 22, 2018 at 11:41 PM
  6. 884x4310ci

    95 th I chip?

    884x4310ci, Oct 21, 2018 at 8:05 PM
    Replies:
    8
    Views:
    182
    884x4310ci
    Oct 22, 2018 at 4:56 PM
  7. Manimal

    5.7 Vortec to 5.0 Vortec

    Manimal, Oct 22, 2018 at 1:28 PM
    Replies:
    4
    Views:
    111
    df2x4
    Oct 22, 2018 at 4:17 PM
  8. Bowtie89

    99 vortec 454 random hard start

    Bowtie89, Oct 21, 2018 at 5:53 PM ... 2
    Replies:
    13
    Views:
    244
    Bowtie89
    Oct 22, 2018 at 4:05 PM
  9. 98Bacon

    ATK HP74

    98Bacon, Mar 31, 2018
    Replies:
    2
    Views:
    247
    98Bacon
    Oct 22, 2018 at 2:44 PM
  10. Crazydavez28

    Is my 5.7 4-bolt main?

    Crazydavez28, Oct 15, 2018 ... 2 3
    Replies:
    22
    Views:
    859
    likestrucks
    Oct 22, 2018 at 1:10 PM
  11. redfishsc

    Normal intake psi?

    redfishsc, Oct 21, 2018 at 7:53 PM
    Replies:
    5
    Views:
    129
    someotherguy
    Oct 22, 2018 at 10:57 AM
  12. inscarguy

    Alignment Issues

    inscarguy, Oct 17, 2018 at 12:04 PM ... 2
    Replies:
    19
    Views:
    710
    kennythewelder
    Oct 22, 2018 at 10:33 AM
  13. 89GMCJOHN

    AC help

    89GMCJOHN, Oct 1, 2018 ... 2 3
    Replies:
    26
    Views:
    861
    89GMCJOHN
    Oct 22, 2018 at 9:57 AM
  14. frydlittlman

    1997 K1500 (5.7L) Cruise Control NIGHTMARE!! PLEASE HELP!!

    frydlittlman, Oct 7, 2018
    Replies:
    6
    Views:
    306
    frydlittlman
    Oct 22, 2018 at 6:22 AM
  15. Tdean91491

    Time for a new motor

    Tdean91491, Sep 23, 2018 ... 2 3
    Replies:
    29
    Views:
    1,280
    Jonathon Kirkpatrick
    Oct 21, 2018 at 11:42 PM
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