"low oil pressure" warning

2,440

Asked by mike1158d Feb 15, 2014 at 09:50 AM about the 2004 Chevrolet Avalanche 1500 4WD

Question type: Maintenance & Repair

Ok here's my problem... I have an 2003 avalanche 5.3 180K miles was on a road trip. leaving for home as I started "low oil pressure" warning came on for about 30 seconds as I was driving-then went off...went to first gas station..checked oil..level was fine. Drove 4 hours home..warning chime went off one other time for about 10 seconds..then off again. took it to a shop next day, when driving there, no warning messages.. He said motor is shot..suggested a reman replacement $4500. told him I needed to think about it I was gonna come pick it up. Went to pick it up. "low oil pressure"warning came on as soon as I started it, it ran 10 seconds and shut down. so I have 1 time a warning shortly after start, then another after it ran at highway speeds (power felt fine) for 4 hours..and now I got the warning at start up.. Any ideas? suggestions? I am the original owner and have maintained the truck pretty well...is the motor really shot at 180K ?

5 Answers

30,425

Could be. Low oil pressure is caused by two things mainly. Your oil pump is designed to supply a certain pressure to your motor, they have a pressure regulator built-in. 1.) The pump or regulator can fail causing low oil pressure. 2.) A component or multiple components in the motor can fail causing an increase in oil flow to that area which causes a pressure drop or low flow to other areas of the motor. Most bearings in your motor are metal on metal and use a small layer of oil in between to operate. If the oil cannot get to the specific bearing the metal on metal contact will destroy the part. If any of the bearings in the engine were starved of oil for to long they will be damaged. How hard was it to start the last time it ran. A reman motor is not your only choice but it is the least risky. You could also get a used motor, some salvage/wreckers will show the used engine running and may install it with a limited warranty. Or if you can live without your truck for a week or two your motor could be re-built, but if the bearings went they may have damaged other components.

10 people found this helpful.
30,425

I'm sure the mechanic is knowlegable enough to know the difference between a faulty sending unit and a toast motor. But you never know.

2 people found this helpful.
80

I have a 2000 Chevy Suburban with a 5.3 Vortec motor I had the same problem and had to get my motor replaced , I broke down the old motor and saw that my push rods were bad I need a pliers to pull them out I had a build up so if your car is still running you need to go in and get it rebuilt or you're going to have to get a new motor real soon

8 people found this helpful.
120

Your oil pan bolts are loose, had the same thing happened to mine would drive it for 15 minutes, low pressure light would come on and I would have to pull over and we stopped vehicle and restart vehicle and then fine for 15 minutes.found loose oil, pan gaskets, bolts tighten the bolts problem solved

12 people found this helpful.
30

I think its as the gentle men saying because I broke one of the bolts when I was tiding the oil pan by the air gun so it might be loosing oil from the oil pan and because I checked the oil yesterday and it was at low level I changed the oil today but I am going to put another new bolt tomorrow and change the oil another time and the gasket

3 people found this helpful.

Your Answer:

Avalanche

Looking for a Used Avalanche in your area?

CarGurus has 22 nationwide Avalanche listings starting at $10,995.

Postal Code:

CarGurus Experts

  • #1
    sverden
    Reputation
    1,220
  • #2
    Mark Weiner
    Reputation
    570
  • #3
    GuruLW9BX
    Reputation
    530
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
222 Great Deals out of 9,112 listings starting at $2,900
Used Cadillac Escalade EXT
4 listings starting at $12,995
Used Chevrolet Tahoe
18 Great Deals out of 859 listings starting at $9,980
Used Ford F-150
363 Great Deals out of 12,802 listings starting at $599
Used GMC Sierra 1500
182 Great Deals out of 9,044 listings starting at $1,000
Used Dodge RAM 1500
85 listings starting at $2,500
Used GMC Yukon
17 Great Deals out of 941 listings starting at $5,998
Used Chevrolet Colorado
38 Great Deals out of 1,157 listings starting at $5,999
Used Toyota Tundra
27 Great Deals out of 993 listings starting at $9,240
Used Chevrolet Suburban
16 Great Deals out of 511 listings starting at $11,950
Used Cadillac Escalade
30 Great Deals out of 535 listings starting at $1,000
Used Chevrolet Silverado 2500HD
39 Great Deals out of 1,814 listings starting at $1,000
Used Chevrolet Corvette
29 Great Deals out of 593 listings starting at $10,989

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.