I have a 2010 suburban 1500 I had a lifter gone cold so one of the rokers came free started to knock.I did the head job and saw that the oil pressure started to drop on idol.
I have changed the oil switch,the oil pump,and cleaned the strainer and the presure still drops to 0 on idol.
mannyc, I am sorry to hear you are having this concern. If you are interested in having your GMC dealership look into this, please do not hesitate to reach out via email. You can email us at firstname.lastname@example.org. Be sure to include your name, VIN, address, phone number, and dealership. Erica Tiffany GM Customer Care
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