Check Oil Light Stays on for 20+ Seconds When 2004 Trailblazer Starts

Why does my oil light stay on when I start my car?

When you first start the vehicle up, this light comes on as it does a system check and momentarily detects engine oil pressure. As the engine RPM’s increase oil pressure increases, thereby signaling to the oil pressure sensor that oil pressure has risen to an appropriate level which then causes the light to go off.

What does it mean when the oil light keeps going on and off?

If the oil light flickers on and off while the vehicle is stopped or at an idle, there may be a problem with the oil sensor or the pressure is too low. At the very least, the engine should have 5 PSI when not moving. If the PSI is less than 5, this will trigger the oil light and cause it to flicker off and on.

How long should the oil light stay on once an engine is started?

Generally speaking, you have about 2 weeks or 500 miles of driving before a flashing oil light turns into a legitimate problem. But once it hits that point, things can go downhill fast, leading to serious mechanical damage. So, try to get your vehicle into a mechanic sooner rather than later.

How do you reset the oil light on a 2004 Trailblazer?
This is really simple all I do is turn the vehicle off go to the on position and push the gas pedal all the way the floor one two three times and then just wait.

How do you know if your oil pump is bad?

A look at the three main signs that you need to fix or change your oil pump: low oil pressure, high engine temperature, and noise.

Common Oil Pump Failure Symptoms

  1. Low oil pressure. A bad oil pump will lose the ability to properly pump oil through your system. …
  2. Increased engine operating temperature. …
  3. Noise.

Can a clogged oil filter cause oil light to come on?

However, oil filters tend to get clogged after a while, especially when they are not replaced during an oil change. Once this happens, the oil pressure in your vehicle will decrease and the oil pressure warning light of your engine will activate.

Why is my oil light coming on when my oil is full?

Low oil pressure means the pump isn’t circulating enough oil, or there isn’t enough oil in the system for the pump to circulate. The oil is important to keeping the surfaces lubricated, so if the oil light comes on and the pressure is low, pull over and turn off the engine.

Why does my oil light come on intermittently?

Low pressure means there either isn’t enough oil in the system or the oil pump isn’t circulating enough oil to keep the critical bearing and friction surfaces lubricated. If the light comes on while at speed, do your best to pull off the road quickly, turn the engine off, and investigate the problem to avoid damage.

How do you check an oil pressure sensor?
If it's a normally closed switch it'll be a short circuit when you start your vehicle. And the oil pressure builds up it should become an open circuit if your oil pressure switch is a normally.

How do you reset the oil light on a trailblazer?


  1. Turn the ignition key to RUN with the engine off.
  2. Fully press and release the accelerator pedal slowly three times within five seconds. …
  3. When the light stops flashing, turn the key to LOCK. …
  4. Turn the Ignition On, Don’t start the ENGINE.
  5. Use the DIC Button.

How do you reset the oil change light?
Okay. So this is a very simple procedure basically. You're just going to put the key in turn. It all the way to the right in the accessory. Position. Then you pump the gas bottle three times. One.

How do you reset the oil light on a 2005 Chevy Trailblazer?
And step to the floor with the accelerator. Three times within five seconds. And it flashes shuts off and it's all reset.

How do you reset the oil light on a 2003 Chevy Trailblazer?
2003 chevy trailblazer change oil light on it turn the key on and step on the gas pedal three times within five seconds all the way to the floor.

How much oil does a 4.2 Chevy Trailblazer take?

7 quartsAfter

Capacity: With filter 7 quartsAfter refill check oil level.

How do you reset the computer on a 2005 Chevy Trailblazer?

Disconnect negative battery, turn headlights on for five minutes to drain all power. Turn off lights and leave disconnected for a bit, 20-30 minutes. Then replug the termincal to the battery and drive for 30 minutes so computer can relearn.

Where is the PCM located on a 2004 Chevy Trailblazer?

In the Trailblazer, the PCM is located on the driver’s side of the engine.

How do you turn off the check engine light on a Chevy Trailblazer?

How Do You Reset The Check Engine Light On A Chevy? The keys: Start the vehicle and run it one second and then turn the key off at the factory, and the check engine light will be reset. Set it back down to quiet mode for a few seconds, and then restart it from scratch two more times.