Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by L0sts0ul, Jun 28, 2009.

  1. L0sts0ul

    L0sts0ul Rockstar 100 Posts


    this is making me feel stupid to have to post this, but does anyone know the stock timing from factory for a 1993, k1500 burb, with a 350 TBI?


  2. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    Is there an Emissions sticker under the hood? If so it should be on there.....
  3. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    I have a 93 and this is what I do:

    For non-HEI (HEI identified by coil in the dist. cap) unplug the tan/black wire located under the cover on the firewall passenger side and set the timing to zero unless your decal says otherwise.

    If you do not disconnect the tan/black wire you will not be able to set the timing.

    Or you can try this from the AutoZone website: (Not much help if your decal is missing)

    Distributor Ignition (DI) Systems

    Refer to the underhood label for the proper timing setting.

    1. Engage the parking brake, block the wheels and set the transmission in P.
    2. Disconnect the Ignition Control (IC) system by disengaging the "set timing connector". This is a single wire sealed connector that has a tan with black stripe lead. This wire comes out of the wiring harness below the heater case.
    3. With the ignition switch OFF , connect the timing light pickup lead to the No. 1 spark plug wire.
    4. Start the engine and point the timing light at the timing mark on the balancer or pulley and check the timing.
    5. If the timing is not within specifications refer to the underhood emission sticker, loosen the distributor hold-down bolt. Slowly rotate the distributor until the proper timing setting is achieved.
    6. Tighten the hold-down bolt and recheck the timing.
    7. Turn the ignition OFF , remove the timing light and engage the "set timing" connector.
    Last edited: Jun 29, 2009
  4. L0sts0ul

    L0sts0ul Rockstar 100 Posts

    thanks unplugged, ill giver a try.
  5. Coupe302

    Coupe302 New Member

    would this also work on a 1990 Chevy 1500 w/ a 4.3L?

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