Question about 2001 GMC Jimmy

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I have a 2001 GMC Jimmy and a computer check has

I have a 2001 GMC Jimmy with the famous 'service engine soon' light on and a computer check has been done and it keeps saying the #3 cylinder is misfiring. The cylinder was checked and there is nothing wrong with it. My mechanic says it is a bad code in the cpu. The cpu was sent out and reset and it still comes up. Is this possible and should I just replace the cpu? It has happened quite a few times over and over.

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  • stevenbbarto May 11, 2010

    have you tried a different mechanic?



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If it was me i would give these guys a call and talk to them they sells only GM-parts its Schram auto & truck parts 1800-292-1032 and they website is and maybe they can help you narrow it down good luck Michigan Man.

Posted on May 09, 2009


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1 Answer

What does it mean when service engine soon is on in my 99 jimmy?

Not related. The service engine soon lite is operated by the speedometer, so it's just coincidence that it came on soon after the water pump repair.

Jul 17, 2014 | 1999 GMC Jimmy

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I have a 2001 Jimmy with "Service Engine Soon"

P0171 System too lean bank 1
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Last time you changed your fuel filter?
Look for any vacuum leaks.

Sep 05, 2011 | 2001 GMC Jimmy

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When I'm on the highway driving my 94 GMC Jimmy.,

have checked the play in the distributor shaft gear . excessive play can cause a timing problem for a moment. also has the service engine soon light came on with a code 42 for the ignition system. ignition control module can cause this concern also.

Jul 14, 2011 | 1994 GMC Jimmy

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Service engine soon light came on and i would like to know what exactly do i need to service on the truck. thanks..

When the Service Engine Soon light is turned on the computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible faults that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.

Feb 01, 2011 | 1997 GMC Jimmy

1 Answer

My jimmy chokes at times and seems to try to shut off, i was told it can be a sensor??

Indeed it can be a sensor.
The question is which one?
One can tell which one is the culprit in some cases, by reading the stored codes that are stored when the service engine soon light goes on.
Have you had your car scanned lately?

Jul 21, 2010 | 2001 GMC Jimmy

2 Answers

How do I reset "Service Engine Soon" indicator light in the instrument cluster on my 1999 GMC Jimmy?(I am an auto mechamic and already change the motor oil)

If you’re not interested in diagnosing your car, truck, or SUV Check Engine Light, or it’s already fixed, and you just want the engine light out, visit an auto repair store.

Most stores will have a universal Check Engine Light Code Reader that can quickly and safely reset check engine light trouble codes. It should take about 30 seconds and is usually free..

Oct 21, 2009 | 1999 GMC Jimmy

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2001 gmc safari flashing service engine soon light

id check mas air flow sensor maybe 02 sensor might bet the mas sensor

Oct 06, 2009 | 2001 GMC Safari

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Service soon engine light on ran scanner code p 410 secondary air injection flow

air pump on the lower passenger front under shield and mounted to frame is bad they get water in them and lock up need new one

Apr 14, 2009 | 2001 GMC Jimmy

1 Answer

I have a 1999 Gmc Jimmy....the check engine came on and i have a self diagnostic machine... the machine said it was the secondary air filter. any ideas 2003 GMC Jimmy. My check engine light came on and I...

Service the throttle body system, and injectors.

then remove the negative battery pole, press the brake down for 90 seconds reconnect the battery pole..

Feb 07, 2009 | 2001 GMC Jimmy

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