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!
    846
    Discussions
    10,388
    Messages
    Latest: Misfire! Help! Canon Lansdell, Jan 14, 2021 at 12:07 AM

  2. LSX + Carb Swaps

    This section is for info on LSX or carburetor swaps into the OBS trucks.
    429
    Discussions
    5,336
    Messages
    Latest: Holley ECU and stock A/C question. Davin Reckow, Jan 9, 2021 at 10:00 AM

  3. Exhaust

    Anything exhaust - from headers cats and pipes to tips.
    876
    Discussions
    10,441
    Messages
    Latest: '97 C1500 4.3L V6 Catalytic Converter/Y-Pipe Recommendations Old77, Jan 14, 2021 at 11:08 AM
Page 1 of 587
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  1. Mike

    The Stupid Engine Questions Thread

    Mike, Dec 3, 2009 ... 150 151 152
    Replies:
    1,518
    Views:
    212,870
    bigfutz
    Jan 15, 2021 at 5:48 PM
  2. Devs93

    The Ultimate 88-98 Performance Toolbox

    Devs93, Aug 1, 2012 ... 2 3 4
    Replies:
    32
    Views:
    163,032
    RCSB91
    Dec 20, 2020
  3. monstar_est87

    How to MarkVIII your OBS on a budget..!

    monstar_est87, Apr 30, 2012 ... 15 16 17
    Replies:
    167
    Views:
    117,663
    Steve Addy
    Dec 16, 2020
  4. Ginger

    Water Pump Relacement

    Ginger, Dec 4, 2009 ... 7 8 9
    Replies:
    84
    Views:
    60,304
    PlayingWithTBI
    Dec 6, 2020
  5. Hodges87

    How to Replace oil filter adapter gasket & o-ring

    Hodges87, Dec 14, 2009 ... 4 5 6
    Replies:
    52
    Views:
    127,124
    HotWheelsBurban
    Oct 21, 2020
  6. Greg

    GMT400 History

    Greg, Mar 16, 2010 ... 22 23 24
    Replies:
    233
    Views:
    236,540
    Erik the Awful
    Sep 14, 2020
  7. Bighead38

    Putting A Chip In A TBI Truck

    Bighead38, Dec 3, 2009 ... 18 19 20
    Replies:
    199
    Views:
    201,220
    PlayingWithTBI
    Aug 25, 2020
  8. shelbyt.67

    ULTIMATE TBI mods stage 1

    shelbyt.67, Jun 28, 2012 ... 24 25 26
    Replies:
    255
    Views:
    244,573
    badco
    Aug 8, 2020
  9. Ginger

    Intake Gasket Replacement

    Ginger, Dec 4, 2009 ... 10 11 12
    Replies:
    115
    Views:
    82,909
    someotherguy
    Jun 6, 2020
  10. Greg

    Maintenance: RPO Code Database & Decoder

    Greg, Dec 4, 2009 ... 2 3
    Replies:
    23
    Views:
    32,579
    dAT OBS
    Feb 28, 2020
  11. supjim12

    Tune Up Parts Numbers

    supjim12, Dec 22, 2009 ... 2 3 4
    Replies:
    34
    Views:
    47,950
    Donald Mitchell
    Dec 26, 2019
  12. Mike

    LS Swapping and Performance FAQ

    Mike, Aug 3, 2013
    Replies:
    9
    Views:
    24,401
    Fedeleon11
    Sep 24, 2016
  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:
    57,461
    txgp17
    Oct 24, 2013
  1. Aparke4

    7.4 Vortec k2500 Exhaust Manifold/ Header Install

    Aparke4, Jan 12, 2021 at 7:15 PM ... 2
    Replies:
    19
    Views:
    481
    Aparke4
    Jan 15, 2021 at 9:22 PM
  2. thegawd

    91 octane

    thegawd, Jan 12, 2021 at 7:49 PM ... 2 3 4
    Replies:
    34
    Views:
    1,004
    thinger2
    Jan 15, 2021 at 8:15 PM
  3. 8T7K5

    99 Vortec 454 injector harness

    8T7K5, Jan 15, 2021 at 7:59 PM
    Replies:
    0
    Views:
    23
    8T7K5
    Jan 15, 2021 at 7:59 PM
  4. Angelo

    GP controller normal operation

    Angelo, Jan 15, 2021 at 1:50 PM
    Replies:
    1
    Views:
    73
    smdk2500
    Jan 15, 2021 at 4:44 PM
  5. Lilredk1500

    PLEASE help me find mounts for my 4.3L k1500

    Lilredk1500, Jan 12, 2021 at 1:30 PM ... 2 3 4
    Replies:
    36
    Views:
    547
    SUBURBAN5
    Jan 15, 2021 at 4:16 PM
  6. BruiserCruiser

    90 4.3 rough idle, runs rough.

    BruiserCruiser, Jan 15, 2021 at 2:33 PM
    Replies:
    1
    Views:
    51
    WhiskeyTango93
    Jan 15, 2021 at 4:01 PM
  7. chevyrider838

    88’ steering gear box work in 99’ obs?

    chevyrider838, Jan 15, 2021 at 8:29 AM
    Replies:
    5
    Views:
    111
    df2x4
    Jan 15, 2021 at 12:00 PM
  8. Fred5280

    1 piece vs 4 piece oil pank gaskets

    Fred5280, Jan 12, 2021 at 8:14 PM ... 2
    Replies:
    14
    Views:
    336
    HotWheelsBurban
    Jan 15, 2021 at 10:41 AM
  9. kenh

    heated vs non heated O2 sensor with headers

    kenh, Jan 12, 2021 at 11:06 PM ... 2
    Replies:
    12
    Views:
    364
    thegawd
    Jan 15, 2021 at 9:49 AM
  10. CountyLineGarage

    Coolant temp changing

    CountyLineGarage, Jan 14, 2021 at 6:45 PM
    Replies:
    6
    Views:
    149
    Erik the Awful
    Jan 15, 2021 at 8:49 AM
  11. Bob Richards

    What’s cheapest easiest way to get more hp & torque

    Bob Richards, Jan 11, 2021 at 9:57 AM ... 3 4 5
    Replies:
    46
    Views:
    2,296
    Edward Case
    Jan 15, 2021 at 7:37 AM
  12. Fast_Z71

    144k mile L31 cam swap

    Fast_Z71, Jan 15, 2021 at 12:20 AM
    Replies:
    0
    Views:
    48
    Fast_Z71
    Jan 15, 2021 at 12:20 AM
  13. dsobieralski

    95 K1500 4x4 350 cid surging and driving me nuts!! Help please.

    dsobieralski, Jan 14, 2021 at 12:53 PM
    Replies:
    4
    Views:
    96
    Schurkey
    Jan 14, 2021 at 8:55 PM
  14. Slime

    5.7 Starting Issue

    Slime, Dec 26, 2018 ... 3 4 5
    Replies:
    45
    Views:
    4,400
    Greasemagnet
    Jan 14, 2021 at 7:34 PM
  15. Tominator

    Cylinder 2 Misfire - P0300&P0302

    Tominator, Mar 29, 2020
    Replies:
    3
    Views:
    237
    stutaeng
    Jan 14, 2021 at 7:18 PM
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