SureTrack Community Fix: No Pressure

Real Fixes from the SureTrackĀ® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free with the purchase of a current Snap-onĀ® diagnostic software version.

You’ve repaired your customer’s vehicle, road tested it with no issues, and park it outside so they can pick it up in the morning. When they do, something isn’t right. SureTrack community member 1Quick6 had a GMC Sierra in their shop that when the customer picked it up the day after the repairs, they found it had no oil pressure. They posed the question to the community, and with the help of fellow community member dmckemie12 and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

2014 GMC Sierra 2500 HD SLT 6.0L

No oil pressure, replaced oil pump.

Oil pressure gauge shows no oil pressure.

Diagnostic Steps Performed/Parts Replaced
Truck came to us with power steering pump failure and rotten engine oil dipstick tube. We changed the pump and tube and topped up the engine oil. Road tested truck with no problems. Customer picked up truck in the morning after sitting outside in -12 degrees F. Now low oil pressure light on and dash gauge shows zero pressure. Installed mechanical gauge at port and it shows no pressure. We dropped oil pan for inspection and it was clean. Pick-up tube O-ring is in place, and through the hole we can see that the pump gears are not damaged and do move when the crank is turned. Is this a common issue?

Best Answer from Community Member dmckemie12
Have had a couple of these with a stuck pressure regulator valve in the pump.

Found stuck pressure regulator valve in the pump.

Replaced oil pump. Oil pressure now back to normal.

SureTrackĀ® is a powerful value-added feature available with select Snap-on diagnostics tools. It offers an exclusive combination of expert knowledge and detailed parts replacement records, all wrapped in an interactive community.

Want more? Click here for more information on using SureTrack.

Looking for diagnostic tools? Click here to request more information on Snap-on diagnostic tools.

New or Expired SureTrack users: Click here for authorization key instructions.

About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.