Low oil pressure?

[GTPaul]

There is an issue with higher mileage 6.0 and 6.2 oil pump pick up o rings. Seems that as they age the o ring that seals the pick up tube at the pump hardens and an air leak develops....sort of like a pin hole in a straw. It's worse when cold but gets better as the engine warms up and the seal swells a bit.

The cure is to drop the oil pan and replace the pick up tube o ring seal. I decided to do mine on my 2005 Escalade LQ-9 6.0 at 185K miles. Once I got it dis-assembled I replaced the pump with a new GM OEM replacement that has the new and improved seal.

I would recommend this to anyone with a high mileage LS GM engine.

As far as driving 1400 miles make sure your oil is current and take it easy until the engine warms up. If there is any way to get the pump replaced before the trip do it. The GN pump is around $125.00...expect labor A-Z to be $300.00....much cheaper than a $6K engine swap.

Good Luck.

I agree I had the o Ring fixed and the my 5.3 still had 45 to 50 pounds of pressure at 256K mile and my wife wanted a newer car but running like a clock when we sold it.

Paul

 

[yukondoit]

Planning to replace the oil pressure sensor soon, ordered the sensor and socket yesterday. Mine went out over the weekend, code PO523 came up.

 

[MSGKUNERT]

Does anybody have the part number for the Oil presser sensor? What about the oil pump that contains the new o-ring?