Question about 2003 Chevrolet Suburban 1500

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01 Suburban engine, 8.1 liter, abruptly turns off

Occasionally the motor of this vehicle will simply "turn off," just as if the ignition switch had been turned to the "off" position. However, all other electrical accessories continue to work: radio, heater fan, windows, etc. Vehicle has about 135k miles, and I think it may be that some of the contacts in the ignition switch are simply worn out. Sometimes it takes awhile to restart. The engine cranks fine, but either it will start right away or it won't.

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  • lucien_rice Feb 23, 2009

    No, the check engine light has not been on, and I'm assuming DTC stands for "diagnostic test code." There's been none of those either. The vehicle usually stalls after it has been running awhile, and sometimes I have to let it sit awhile before it will start again.

  • lucien_rice Feb 26, 2009

    There is no remote starter and the security light does not come on when the engine dies.

  • carhob May 11, 2010

    do you have a remote starter,if yes couldbe bad splice,is security light on in dash

  • warr wiz May 11, 2010

    Is there any check engine lights on, or any stored DTC's? Does it stall hot or cold? I believe there was a recall for crank sensor issues on that type of vehicle.



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Its the crank sensor. There was a recall a few years back for 2001 8.1 liter engines crank sensor. Engine would shut off perodically and sometimes would not restart untill cool. Plus it just happened to mine. about a 350 dollar dealer fix.

Posted on Sep 08, 2009


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2000 suburban- replaced battery. security light on and won't start?

Did you try a relearn ?
30 Minute Re-Learn Procedure
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> C-2500 Suburban (2-Wheel Drive) or K-2500 Suburban (4-Wheel Drive)?
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With all that said, I also find that the problem description is a little unclear. When you say "No response from the ignition electrical system", do you mean that the starter will not crank the engine? Or do you mean that the starter is cranking the engine, but there is no ignition? Or do you mean something more like nothing works when the ignition switch is turned on?

When it comes to electrical diagnosis, it is very important to know what IS working, as well as what is NOT.

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There should be one more light duty wire that operates the starter motor engage solenoid .- This is connected back to the ignition switch 'Start' +12V control output.

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