Service engine soon light is on

Check Engine Soon light is blinking. Code P0300 Random misfire. Light does not come on at all while driving around town. Only comes on when on the highway at over 60 mph. The light blinks for several minutes and then eventually goes out. Then several minutes later it comes back on blinking again. When the light comes on, the truck continues to run smoothly and there is no indication that something is wrong. A tune up fixed it.

My check engine light is on and the code is P0446 Evaporative Emission Control System Vent Control malfunction. Any suggestions on how to fix this

2000 silverado, battery went dead over night I jumped it and it started right up but when I put it in gear it dyed but after giving it gas it started to idle correctly. The Service engine soon light came on. I got some different gas and checked the gas cap to make sure it was on right and not leaking any fumes. Than the next day the light went out but than came back on that evening. It stayed on for a couple of days than it just went off for a day and now it's back on and won't go off. The truck seems to be running great. Is there a way to reset the Service engine soon light. Because tomorrow It might go out while I'm driving I don't know.

I looked for the vacuum hose and cant find it I have no exhaust leak I put my hand over the end of the tail pipe and did not hear any leaks so what else can I check I have no electronic tools to diagnose the problem

I having trouble with my pickup sevice engine light I took it to a shop and they put there tester on and I have a vacuum leak they said chearge me a $100 to fix. A month later sevice engine light comes on again so I take it back now they tell both of my converters or bad charge me another $100 to test. Then they told me it would cost around $600 for them to replace both converters. I found a muffler shop and they only wanted $375 to chage both converters. So I had them change them but they couldn't reset the service engine soon light but they told me to disconnect the battery and the computer would reset the light well theat didn't work. Is there anyway it could be reset without going back to the shop and paying another $100. My pickup only has just a little over 100000 miles on it I talk with other chevy pickup owners and they said the have a lot more miles on there truck without no problems. Thanks John

Service engine soon light is on. The light has been on for seveal weeks. The truck runs fine.I, ve read the code i, ts po440 evap emission control system malf. Ive changed the purge valve &gas cap with no luk.

I had to replace the purge valve solenoid to get mine to quit setting the light. The shop also smoke checked the system to be sure there were no leaks

Service engine soon. Comes on under load and motor shutters under heavy load. Then light comes on. Have replaced plugs, wires Dist cap and rotor. No luck

Hey thanks for the reply. Yea I got the code read at auto zone. Although it wasn't much help. It showed P0300 which means Random/multiple Cylinder Misfire Detected. I thought maybe coil but, then again fuel pressure? Could mean so many things. I was going to call the dealer and see if his costly scanner could be alittle bit more specific.

Check engine light is on and I have found that driving it is not what sets it, It comes on with the second key run/engine on cycle. Symptoms are an occasional jerk. What has to be done to troubleshoot this, and repair?