2014 Silverado with 4.3L. Started getting the dreaded P06DD and clearing code would only keep it away for a few days at the most. Noticed my oil pressure was about 10 lbs high. Searched forums and had accepted the fact that I would need to have the oil pump replaced. I then realized this code started about two weeks after an oil change at a local independent shop. I know how shops use the same oil in every vehicle they service. I had read from a certified GM tech that incorrect oil rating or viscosity could cause this and to be sure you are always using a Delco filter. Decided to change the oil and filter myself with 5W30 Mobil 1 that is Dexos rated and a Delco PF63 filter. My oil pressure came down around 8-10 lbs immediately and the light has not returned after six months and another oil change.
2014 Silverado with 4.3L. Started getting the dreaded P06DD and clearing code would only keep it away for a few days at the most. Noticed my oil pressure was about 10 lbs high. Searched forums and had accepted the fact that I would need to have the oil pump replaced. I then realized this code started about two weeks after an oil change at a local independent shop. I know how shops use the same oil in every vehicle they service. I had read from a certified GM tech that incorrect oil rating or viscosity could cause this and to be sure you are always using a Delco filter. Decided to change the oil and filter myself with 5W30 Mobil 1 that is Dexos rated and a Delco PF63 filter. My oil pressure came down around 8-10 lbs immediately and the light has not returned after six months and another oil change.