2007 5.3 GM engine 6 ksi at idle oil pressure normal

Asked by Mar 09, 2014 at 07:39 PM about the 2007 GMC Sierra 1500 SLE1 4WD

Question type: Maintenance & Repair

On my 2007 5.3 engine Oil pressure is at 35 ksi when start engine cold and when warms
up  pressure drops  to around 6 ksi at idle, when running  holds around 28 ksi with 8
cylinders when deactivates to 4 cylinder goes up to 45 ksi

Check engine light comes on after engine warms up and stays on. It has been doing this
for around 40,000 miles. I changed oil pump about 18 months ago when first started

Is this ok/normal?

Anything I can do to increase oil pressure? I currently use 5W-30 oil

5 Answers

Also when engine is warm at idle runs at 500 rpm and oil pressure is at 6 ksi Running on 8 cylinders at 2200 rpm oil pressure is at 28 ksi

785

most 5.3 should run at about 40psi mayb 30 at lowest on idle, if ur turning 2k rpm on highway should be around the 50psi mark, u could have a bad seal at oil pump or something, power-train warranty from gm covers til 160k or 5yrs, u may get lucky, if you change oil to a diff viscosity you could run risk of running bearings dry especially since ur having oil pressure issues, i run 5w40 cj 4 rated heavy duty rotella t oil in my 5.3 gas ( yes its desiel rated oil)

What does this type of oil do?

785

the oil i run has a better additive package designed for heavier duty use, i use my truck for a truck, hauling, payload, higher rpm range, i find its less inclined to burning as well, you can try using it but i would recommend finding the root cause to ur oil pressure issue, sierra/silverado forums reali help with ideas and eliminating and narrowing down ur issues

10

Hi Textiger66 did you fix the issue with the low oil pressure?

1 of 1 people found this helpful.

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,592 nationwide Sierra 1500 listings starting at $999.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,780
  • #3
    Glenn Clingenpeel
    Reputation
    3,470
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,611 Great Deals out of 174,523 listings starting at $1,000
Used Ford F-150
3,163 Great Deals out of 219,406 listings starting at $700
Used GMC Sierra 2500HD
121 Great Deals out of 14,249 listings starting at $2,799
Used Toyota Tundra
708 Great Deals out of 34,613 listings starting at $1,500
Used Chevrolet Silverado 2500HD
366 Great Deals out of 30,448 listings starting at $3,000
Used Toyota Tacoma
698 Great Deals out of 45,608 listings starting at $2,500
Used Dodge Ram 1500
444 Great Deals out of 11,109 listings starting at $2,000
Used Ford F-250 Super Duty
394 Great Deals out of 48,801 listings starting at $1,899
Used Chevrolet Tahoe
825 Great Deals out of 41,817 listings starting at $1,995
Used GMC Yukon
608 Great Deals out of 20,972 listings starting at $2,695
Used Cadillac Escalade
261 Great Deals out of 11,930 listings starting at $1,200
Used Chevrolet Colorado
340 Great Deals out of 37,552 listings starting at $1,995
Used GMC Canyon
164 Great Deals out of 13,854 listings starting at $2,900

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
25,680 listings starting at $24,499
2017 GMC Sierra 1500 For Sale
63 Great Deals out of 11,618 listings starting at $20,369
2016 GMC Sierra 1500 For Sale
160 Great Deals out of 4,044 listings starting at $16,404
2015 GMC Sierra 1500 For Sale
211 Great Deals out of 5,588 listings starting at $14,995
2014 GMC Sierra 1500 For Sale
208 Great Deals out of 4,929 listings starting at $9,900

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.