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    Occasional starting problems (fuel pump?) Please Help!

    Turn your key to the on position and listen for a humming sound . That sound would be your fuel pump. If you don't hear it the pump isnt turning on.
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    PO420 code

    Thanks for the input fellas. The cat was bad and the sensors are still good.
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    PO420 code

    Anyone ever have the PO420 code on their 1996 chevy truck ? If so how did you fix it ?
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    2000 escalade

    I wish that was the problem... no the 4x4 doesnt work at all.
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    thermal actuator

    Would the actuator cause all the 4x4 lights not to come on including the service 4x4 light on the dash ?
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    Missing and small popping at highway speeds

    I've been having a problem with my 96 vortec . At highway speeds (65-70) and with a light throttle it starts to misfire and jerk a little. The rpms dont move they stay still , and i hear a little popping or backfiring. I changed the cap-rotor-plugs and wires and still the same result. I also...
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    2000 escalade

    Ya its an escalade on the outside but chevy on the inside. Same vortec 350 as my 96 truck. I will check the switch thanks.
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    2000 escalade

    Looking for some help with the 4x4. The service 4x4 light doesnt come on when the key is turned on along with the indicater lights. I checked the fuses that i know of and they are good. Any kinda feed back would be helpful. Thanks..
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