Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

  • 2

Vortec Max 6.0 Oil Pressure?



on my 07 nnbs Vortec Max when the engine is at normal operating temp and at idle the oil pressure Gauge is just above 20 and cruising at 60mph it is just under 40. is this normal for a 33k mile truck?? every one of my other silverados have had just over 40 at idle and around 50 cruising

Link to comment
Share on other sites

Recommended Posts

  • 0
46 minutes ago, Jeffery Porter said:

Same issue on my 04 5.3. I was told rod bearing won't help the low pressure @ 500 rpm. I'm thinking rod and main bearings, I don't have any more ideas.

What about your pickup tube o-ring?  They usually fail around 160K miles.  Quick way to check is to overfill motor with an additional 2-3 quarts of oil to submerge o-ring.  If pressure rises, you have identified culprit.


The OP in this nine year old post, that's normal for an aluminum engine.

Link to comment
Share on other sites

  • 0
On 12/31/2019 at 10:54 AM, Jeffery Porter said:

New o ring, new oil pump, new sender unit. No noise, just low pressure at idle.

Driving I have 20/30 1500 to 1800 rpm.

Well, you are above minimums, you can check the pump spring, maybe run a slightly thicker oil or just drive it until you schedule an engine overhaul/replacement.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

By using this site, you agree to our Terms of Use.