"low oil pressure" warning

840

Asked by 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

11,015

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.

3 of 3 people found this helpful.
73,935

I doubt it. I'd check the sending unit and it's wiring for the dash gauge. Sounds like it's developed a bad connection. If no problems are found get a mechanical oil pressure gauge, for testing purposes, and see what's going on. Kinda like getting a second opinion at the doctor's office. BTW the reason it shut down is a safety feature. When the computer detected the low oil pressure message it shut down the engine to prevent damage. HTH. -Jim

2 of 2 people found this helpful.
11,015

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.

73,935

Exactly, you never know. -Jim

30

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

3 of 3 people found this helpful.

Your Answer

Avalanche

Looking for a Used Avalanche in your area?

CarGurus has 5,025 nationwide Avalanche listings starting at $2,488.

ZIP:

Chevrolet Avalanche Experts

  • #1
    Tom Demyan
    Reputation
    340
  • #2
    David Scott
    Reputation
    180
  • #3
    Oscar Leon
    Reputation
    150
View All

Related Models For Sale

Used Chevrolet Silverado 1500
3,004 Great Deals out of 162,981 listings starting at $1,500
Used Ford F-150
3,338 Great Deals out of 225,656 listings starting at $1,250
Used Chevrolet Tahoe
904 Great Deals out of 39,855 listings starting at $1,990
Used Cadillac Escalade EXT
19 Great Deals out of 590 listings starting at $4,599
Used GMC Sierra 1500
1,262 Great Deals out of 63,300 listings starting at $1,200
Used Dodge Ram 1500
378 Great Deals out of 11,014 listings starting at $1,699
Used Chevrolet Colorado
389 Great Deals out of 38,897 listings starting at $1,950
Used Cadillac Escalade
295 Great Deals out of 11,542 listings starting at $1,200
Used Toyota Tundra
693 Great Deals out of 34,603 listings starting at $2,799
Used Chevrolet Suburban
531 Great Deals out of 23,248 listings starting at $1,250
Used GMC Yukon
571 Great Deals out of 18,765 listings starting at $2,000
Used Toyota Tacoma
670 Great Deals out of 41,420 listings starting at $2,500

Used Cars For Sale

2013 Chevrolet Avalanche For Sale
17 Great Deals out of 469 listings starting at $13,999
2012 Chevrolet Avalanche For Sale
10 Great Deals out of 251 listings starting at $10,000
2011 Chevrolet Avalanche For Sale
28 Great Deals out of 507 listings starting at $8,995
2010 Chevrolet Avalanche For Sale
14 Great Deals out of 268 listings starting at $7,981
2009 Chevrolet Avalanche For Sale
9 Great Deals out of 304 listings starting at $7,995

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.