What causes service engine soon light to come on in a 2000 gmc sierra 1500 4.8 L v8?

Yup and it won't work till you get the check engine light fixed, what ever is causing that to come on.,it is a safety feature if there is a service vech. soon light on the remote start does not work !

Spray starting fluid into the air intake of the engine, if it starts and you have fuel pressure you have no injection or injector pulse as we call it. Check ECM fuse one and two for continuity if it starts with fluid..

The PCM has detected a fault in one of my of the systems that it controls. It turns the light on to let you know this. Codes should be stored in the PCM's memory. Most auto parts stores will hook up a code reader for free and let you know what codes are present.

Make: GMC
Model: SIERRA 1500
Year: 2003
Engine: V8 - 5.3L - FI - - GAS



Hope thats helped (remember rated this help). Good luck.

ever tuned it up? sounds like its due. plugs, wires, fuel filter (if equipped), PCV, and an intake system cleaning should restore your fuel economy to where you want it.

your heat/cool and vent selection options are controlled by engine vacuum through small clear tubes attached to the rear of your climate control interface. Other vehicles have small steel pull wires that operate the desired changes. You might try removing the trim and any fasteners affiliated with the interface/console. GENTLY pull outward and look to see if any of these tubes are pulled off or cut/damaged. Did anyone recently install a new stereo in the vehicle? If so, the vacuum tubing and or pull wires that change your outlets could have been damaged when the stereo unit was pushed into place. Hope this helps

you can bypass the system. There is a great write-up here: http://newrockies.ca .

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

Try Removing the ECM Fuse from Panel for about 2 to 3 Min. Should clear codes.

Im not sure if this can help, but my 2000 gmc sierra was idling badly. Replaced Fuel Pressure Regulator and my truck runs like its brand new. My service engine light was also on.