Question about 2003 Chevrolet Suburban 1500

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I have an '04 Z71 suburban with 121k miles. I came off the expressway into heavy traffic at a light. As traffic moves forward slowly, the truck starts shaking violently, like thrusting. (The check engine light is on but it was reading something about emissions and was already on prior.) The truck then dies, so I put it in neutral and attempted to start it. It started on 2nd try. It happened again but the circumstances were different. This time I hadnt been driving very long, 5 minutes or so. I pulled up to the school to drop off my child. It starts shaking violently, just to emphasize its not the steering wheel, but the entire vehicle shaking. I dont have much room to go forward but the couple inches I moved forward didnt resolve the shaking (since I was told the idle might be weak). It didnt die again though but the rpm was jumping even though the vehicle was at a stop. It felt like it was about to die like the last time. I had my mechanic look at it and he said he didnt find anything wrong with the idle and drove around and it didnt happen to him.

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  • Jeremy W.
    Jeremy W. Oct 01, 2010

    did he check to see if there where any new trouble codes?

  • jessicaprune Oct 01, 2010

    No new codes were found.

  • jessicaprune Oct 01, 2010

    Also, the battery light came on when it died the first time. However, the battery is new and the terminals were checked too. So its not poor contact.

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Does it gallop when you are sitting idle and the RMP gauge bounce up and down between 1000 and 1500? If so, clean the throttle body and see if that solves the problem. I had a similar problem with my 03 Yukon XL (same truck) and cleaning the throttle body fixed it.

Posted on Oct 02, 2010

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