I just purchased a 2004 gmc sierra z71..love it but i had taken it back to the dealer cause the engine oil life came on so they changed the oil and told me that they reset the oil life.. so it stayed off for 3days but know its back on again.. what would cause that?
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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.
1. Turn the ignition to ON do not start.Engine OFF dash board lights ON. 2. Press and release the reset button in the driver information center (DIC) until the OIL LIFE message is displayed. 3. Once the alternating OIL LIFE and RESET messages appear on the DIC display, press and hold the reset stem until several beeps sound. This confirms the OIL LIFE system has been reset. 4. Turn the key to lock. If the CHANGE OIL message comes back on when you start the engine, the ENGINE OIL LIFE system has not reset. Repeat the procedure Alternate Method
1. Turn the ignition key to ON with the engine off.
2. Fully press and release the accelerator pedal 3 times within 5
seconds. Several beeps sound. This confirms the oil life system has been
3. Turn the ignition key OFF. 4. If the CHANGE/OIL message comes back on when you start the
engine, the engine oil life system has not reset. Repeat the procedure I use the second method, it is more universal and it works for Chevy Venture too.
theres no advance wire on that engine!!! theres a hash mark on the back of the intake and one on the distrbutor shaft you set the distrib with the has mark and yes!! the ecm! will always reset the timing that is what is does but if it's pinging or knocking then change the ignition module cause the dwell side of it is out of range!
The oil pump is in the oil pan and needs to be dropped and being a 4WD you also need to drop the front axle pumpkin to remove the oil pan and replace all the gasket needed. Start with the easy and replace the oil pressure sending unit, it's on the back of the engine to the passenger side of the distributor. You can go to Auto Zone and pick up a new Oil sending unit, just make sure your get the right one, "Sending Unit" Looks the same are the oil pressure sensor but the unit reads the pressure, the other just signal a light to go on and off. It's an easy fix like replacing a spark plug.