My oil pressure started dropping in my 07 Tahoe 5.3L (306k) and I am fairly convinced it is the oil pick up seal which mates to th eoil pump. Going to change the oil pump out as well. I know the standard process is to drop the pan which on a 4X4 is a real pain. Anyone have experience with doing this job without dropping the pan on a 4x4.
2007 Tahoe Oil Pump Change
- Thread starter Plimbob
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I don't think it's really possible. It takes like 20 minutes to drop the front diff. You'll need to lower the steering rack for clearance too.
You have to drop the pan to access the oil pump and oring. You’re on the right track as far as the oil pump oring goes. My 5.3 had a bit of rattle and low oil pressure on start up and the new Oring fixed it. Mine is a two wheel drive so wasn’t too bad. Several good utube videos on this procedure.
Make sure the Pressure Relief Valve in the pan has a shield on it to reduce oil consumption, In fact....It's not a bad idea to replace the Valve itself as they can leak & cause low pressure concerns.
Absolutely golden advice and the valve is under $30 last time I did one.,,if I recall correctly.
Yep. List price on the valve is under $10. Most of the oil pressure issues I see on these engines are caused by this stupid regulator; we just automatically figure a new one and shield into the estimate any time we pull a pan.
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