Question about 1994 GMC Sierra

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My 94 gmc truck ''service engine soon'' light comes on wanted to know how to get the codes from it.

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Need an OBD1 scanner,not OBD2 ,and hook to under dash connector

The Cadillac was the only one you could jump two pins, and read off the fuel display

Posted on May 01, 2010

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Posted on Jan 02, 2017

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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

1 Answer

The service engine light has come on.


The service engine soon (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system u will seldom feel the car engine run any different, there are about 200 possible faults that turn the 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.

Nov 10, 2010 | 2000 GMC Jimmy

1 Answer

I have a 2004 GMC Envoy with 82400 miles. My service engine soon light continuously stays on. I have had it in the shop numerous times and they have run diagnostics. I have had a tune up done, 2 sensors...


You need to let us know what the fault code(s) is. Did anyone ever give this information when they were working on the vehicle? There are many reasons for the check engine light to be turned on.

Nov 06, 2010 | 2004 GMC Envoy

1 Answer

SERVICE ENGINE SOON light comes on & off every 130 miles or so on my 99 GMC Sonoma. Had plugs, wires, cap & exhaust changed.


There to many things that can set off the service engine light on. If there is an Auto Zone or Parts Source around you, have your Sonoma scanned for the DTC codes. It cold be as simple as a faulty gas cap that is setting off your service light to come on.
Thank you for using Fixya.

Mar 26, 2010 | 1999 GMC Sonoma

1 Answer

How do you reset your service engine light on your 98 gmc sonoma


you need a scanner to reset the service engine soon light but it will come back on until you fix the problem you need to check system to get a trouble code

Jan 31, 2010 | 1998 GMC Sonoma

1 Answer

Need to know troubleshooting codes


http://www.obd-codes.com/trouble_codes/

May 25, 2009 | 2000 GMC New Sierra 1500

1 Answer

1994 Sonoma service engine soon. Code 13?


Actually codes are specific to vehicles, you will need to bring it into a shop and have it checked. Any time a "Service Engine Soon" light comes on, you have and emissions problem, and it will not pass inspection

Jan 20, 2009 | 1994 GMC Sonoma

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