Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi there, I am Cam. Can I get your first name please? Can You tell me when your see the smoke the most? When stopped at a light or stop sign and for a short time after taking off from said stop light?
James, This is a sign that the injector nozzles are leaking a bit. AT idle the computer tires to smooth the idle out, so the injector timing changes for each cylinder, which is the balancing rate. When they leak, during idle they smoke a light gray white or black smoke. The key with this is at idle. This is typical. The diagnosis for this is to disable the injectors one at a time and watch the amount of smoke that is being produced. Any injectors that you disable that make a difference will need to be replaced. This fault was never covered under the special policy that GM put out.
That's unfortunate. Yes it would be blue/grey/white ish. It would not be pure white, I think it depends on the fuel itself. I would look to getting them replaced again after trying an additive to the fuel.
And sorry for the delay. I moonlight on the ambulance.