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Could be a worn inner c/v axle joint....but do not count on my guess. I reccommend you have someone exsperenced in drivetrain, suspension and steering check your car for you.
Most likely the instrument cluster will need to replaced. Exchange units can be purchaced.
The simple anwser is no unless a noise was evident on a road test. When a bearing fails it can fail rapidly.
Its a chain on a 3.7 liter engine
In my opinion I would replace the wires. Rarely do I see coil problem with GM products so I would leave them be.
I suspect you may have a fuel injector that is leaking....better get that checked asap.
Could be a theft deterant system problem that is preventing it from starting. Next time it happens look to see if a "theft" light flashing on your instrument cluster. Car is at the age that passlock sensor could be failing in the ignition lock assembly.
You are just at the begining of diagnosis. Codes tell you what system has a fault. P0010 is a fault detected with Camshaft Position (CMP) Actuator Solenoid Control Circuit. P0420 is a fault with catalytic converter:Catalyst System Low Efficiency. I suggest you have the problem P0010 Diagnosed and repaired first. That issue could have set up the conditions for the P0420.
Code means that a misfire has been detected at #6 engine cylinder.
If your car is not low on coolant now, likely the heater core that provides heat is stopped up with rust. This is something I have seen many times with that year and model car. Many times we have been able to back flush the heater to get the coolant flowing throught it so you will have heat. This method of repair does not always work but we usally try that first trying to avoid the major exspence of replaceing heater core. My shop is in your area should want to call us so we can exchange more information.