P0300 GMC -

Question

p0300 dtc, my bro had plugs and wires replaced, intake gasket set,knock sensors, and fuel sys svc. brought the trk to me with same issue. I looked over what the 1st tech did and repair order. any other suggestions.

Answer 1

Hi there,

Here is a list of possible causes for this code.

P0300 GMC - Cylinder Misfire Detected Random Cylinders

Read more: https://www.autocodes.com/p0300_gmc.html