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Yes, most likely it is a defective oil pressure sending unit. However, oil pressure is something you do not want to take chances with. Have it checked with a manual gauge to determine the problem as soon as possible to avoid possible major engine failure. I hope this helps.
Doesn't completely sound like a fuel pump problem...sounds like a vacuum line problem .... check your pcv ...and vacuum lines and when was your fuel filter last changed and how many miles are on the car...your fuel pressure regulator solenoid needs to be dry on the vacuum side too...diaphram could be leaking but if you can't find an obvious problem I would definiately find a qualified mechanic to dive into it...do you have access to a scan tool to read the trouble codes?
GM OIL LIFE SYSTEM - RESETTING The engine oil life monitor will indicate when to change the engine oil - usually between 5 000 km (3,000 miles) and 16 000 km (10,000 miles) since the last oil change. Under severe conditions, the "CHANGE OIL SOON" light may be displayed before 5 000 km (3,000 miles). The vehicle must not be driven more than 16 000 km (10,000 miles) or 12 months without an oil change.
Reset the oil life monitor when the oil has been changed, use the following procedure:
Turn the ignition key to the RUN position.
Fully push and release the accelerator pedal 3 times within 5 seconds.
If the Change Oil Soon light flashes, the system is resetting.
Start the vehicle.
The oil life will change to 100%.
If the Change Oil Soon light comes back on, the system has not reset. Repeat the procedure.
service engine soon is a driver/owner reminder, check your engine oil or rest it after changing to 100%, if you have the owners guide book, read it and follow the maintenance procedure to avoid severe damage to your car
TRANSMISSION FLUID AND TRANSFER CASE FLUIDS ARE SUPPOSED TO BE CHANGED EVERY 60,000 MILES. ENGINE OIL AND FILTER SHOULD BE CHANGED EVERY 3,000 MILES, THESE ARE AUTOMOTIVE INDUSTRY STANDARDS I HAVE WORKED WITH FOR 35 YEARS
Hello tdamm...No...the service engine soon (SES) light on your yukon is not telling you to change the oil. This is a warning light that is illuminated when there is a problem affecting the Emission system and the engines computer management (ECM) has detected it from a fault. It could be something as simple as a loose or defective gas cap. If the SES light is blinking, it's more serious.... The yukon needs to be connected to diagnostic equipment (scanner) for fault diagnosis. You can go to autozone they will hook up an OBD II scanner to your vehicle and explain the codes to you. Good luck...i hope this helps and will fixya up.