David Coates

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.