Oil light - Chevy Colorado & GMC Canyon
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post #1 of 7 (permalink) Old 04-17-2017, 09:47 PM Thread Starter
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Thumbs down Oil light

My oil light comes on often when I brake, come to stop and idle a few seconds. I add oil and it stays off for about 3 weeks. Then again it comes on when I brake and stop.
I am seeing no leaks. There is no exhaust smoke as though it is burning oil.
I have added several quarts over the past months. When I check my dipstick it reads full and more. I am concerned I have more than the 6 quarts in my system, although it is running fine.
Any ideas?
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post #2 of 7 (permalink) Old 04-17-2017, 09:59 PM
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Oil doesn't evaporate. If your not leaking it and still needing to add it, then your definitely burning it.

But some things that might help are, what year and motor do you have, and the mileage.

2005 5 cyl, Black on Black, 4 door
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post #3 of 7 (permalink) Old 04-18-2017, 06:34 AM Thread Starter
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It is 2006. 5 cylinder motor. 209,000 miles. I don't think I need to add oil. The dipstick reads it is full and more. I have added as the light alerts me. I also added STP Stop Leak. I don't know that I am losing oil.
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post #4 of 7 (permalink) Old 04-18-2017, 06:59 AM
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Continuing to add oil to a system, that is already full, is eventually going to cause major problems. When this problem first started, how low was the reading on the dipstick?

With that mileage you could have a worn oil pump. Could also be an issue with the oil pressure relief valve.

Some Owners have had problems with oil leaking into the oil pressure switch connector. Remove the oil pressure switch connector and see if it has any oil in it. The switch located just above the oil filter.
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post #5 of 7 (permalink) Old 04-19-2017, 11:49 AM
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The oil light is due to low oil pressure, not low oil necessarily. When oil is run too low, you will lose pressure and get the light. BUT if your dipstick reads full, there is no point in adding more. It is reading from the same place you are adding it! If it were me, I would do a full oil change immediately and ensure you fill with the correct weight (5W-30) and to the correct level. Then if you still get the oil light, start diagnosing pump pressure as cart7881 advises.
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post #6 of 7 (permalink) Old 04-19-2017, 12:24 PM
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Like others said, don't add more oil if it isn't low. You will eventually add so much it will destroy the engine. It could be low pressure or bad pressure switch. Does it only come on at idle? most likely low pressure because of a worn pump. Only a manual gauge used by someone who knows how to use it will tell. Does the light come on intermittently/flicker? Then probably a bad pressure switch or wiring. (not very serious)
First thing is to check the amount of oil like you did, BUT DONT add if it is full! Drain it till its right and get it diagnosed. (or drive it till it dies if you don't want to spend money on it. You might be lucky and it is just the switch. Or even the pressure is low but it will keep going. Just know that if the pressure is low it will eventually kill the engine. How long it will go depends on how low the pressure is. With a truck with that many miles I would use something like 20/50. (unless you are in a cold climate, there 10/30) That will help keep the pressure up too.

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post #7 of 7 (permalink) Old 04-23-2017, 07:24 AM Thread Starter
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Thanks for the responses

I will not be adding any more oil so long as the dipstick reads full +. I drove about 100 miles yesterday and the oil light did not come on. I'm about due an oil change anyway, so I will be interested in how much comes out when I drain. At that time I will look for that switch.
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