i recently purchased a truck approx 5 months ago and it has been hell. its a 2003 gmc sierra k1500 v8 4.8L manual reg cab long box 137000km. i have a hole lot of problems with it, so far i have changed all the brake pads, calipers, rotors, brake lines also have replaced spark plug wires, plugs and changed 3 coil packs 1,5,6. iv been dealing with a random misfire code p0300,p1380. i had gm hook up a code reader and they said cylinder 1,5,6 were the worst thats y i replaced the packs but to no avail that didnt help. i purchased a code reader for my laptop and started looking at the freeze frame data but to be honest im pretty lost with it. this data is from a trip to my cottage and back 100km/h for approx 400km
just wondering if any one can look at my data and give me an idea of what i should try next.
sorry the program i use wont let me save the data so i had to printscreen and piece it together