Have a 2011 Silverado 1500 with roughly 60,000 miles on it. Noticed the check engine light come on a couple weeks ago. Had the following codes that were displayed: P0301 (cylinder 1 misfire) and P0521 (Engine oil pressure sensor range). Week ago tried to deal with the P0521 and replaced the oil pressure sensor and the screen replaced. Got rid of that code and of course 15 miles later it turned back on. Kinda stuck at this point and dont want it to become a money pit, as the warranty has expired. Have been recommended a tune up? Any help would be great. Thanks!

 

Did you check the spark plug and wire for cylinder 1? It could also be the coil pack. Did you change the oil?

 

oil full and good condition? what filter are you using? May be time to put a mechanical gauge on it.