You can try a Chevy dealer to purchase on new or try some of the different online sales sites. You could also try you local salvage yard, they might have one and it may be alot cheaper.
your owners manual will have all the recommended maintenance schedule in it.
the schedule is in the owners manual
Read your car manual.
Check your manual.
Most of them are done on a maintenance schedule or if there is a problem with them not firing. Check your local repair manual or servie maintenance manual.
You should follow your maintenance reminder or maintenance schedule in your manual. So it depends.
Most automobile manufacturers supply a maintenance schedule in the owners manual. Maintenance schedules can be obtained from most automobile dealerships.
Look in the Owner's Manual, or online.
Check your owner's manual. The schedule depends on the year and engine in your car, as well as what mileage you're at.
Open your owner's manual and look at the maintenance schedule. It tells you what to do and when.
I checked the user's manual backwards and forwards. There is no classical table of schedule for maintenance. But the warning lights will illuminate when it needs maintenance. The codes are explained in the manual and it tells you what to do accordingly. The dealers say "just follow the cars warnings" God bless SI lovers...
look in your manual. added by another user: I think if he had a manual, he would have checked it. Dipsh*t.