A customer's auto is producing blue exhaust. What could cause this
You're burning oil.
yes. Though most call it black not blue.
Auto exhaust= CO2+CO+SIO2+H20. Auto exhuast is a mixture
if you have blue smoke coming into the exhaust that means your piston rings are bad and are letting oil into your combustion chamber and then causing the oil to be burned with your air fuel mixture and that's why your exhaust is blue from having that burnt oil dumped out of the exhaust valve and out the exhaust
Blue exhaust fumes are an indication of burning oil, which is mixing with the fuel - probably from a leaking piston ring or valve seal. You definitely need to bring your car to a mechanic for a check-up.
The exhaust is stainless steel. Heat causes stainless steel to turn blue.
integral exhaust manifold
NO
There is a Sears Auto Center in Cheyenne WY that may will be able to help you purchase a exhaust system for you Silverado. You can also try the local Advanced Auto Parts as well.
In a gasoline fueled engine, blue smoke is a sign of oil being burned with the gasoline. This could be from rings allowing too much oil by the piston, a leaking valve guide or even oil being mixed into the gasoline. Two cycle engines, which have oil mixed in with the fuel on purpose, will often produce this light blue smoke at the exhaust. This would be a natural condition.
Cars do indeed produce exhaust, but they are not the only source of exhaust which can come form other forms of transport, house boilers and factories.