Hey. I've had my '99 Silverado for about 5 months now. My engine light has been on since i got the truck, and have traced to code to a PO420 (http://www.obd-codes.com/p0420). Which is mostly related to the catalytic converter system. I haven't experienced any problems. Only that the engine reads that it's running a little cool (87celsius). The other day the 'Low Coolant' light came on for the first time. It was about 1/4" low at most, so I topped it up. Today the light came back on and it was about an inch low. There are no leaks and I don't smell anything out of the ordinary, so I suspect there may have been air in the system, only because this hasn't happened before. I'm going to take it for another drive to see if it drops again.
I guess I don't really have a specific question about this, just maybe some opinions on what I'm looking at and what major problems could be awaiting if I don't sort this out sooner than later. I live in an area where the emissions laws are pretty lax, so if failing an emission test is my only concern, I won't panic,otherwise, any tips would be greatly appreciated. Thanks.
I guess I don't really have a specific question about this, just maybe some opinions on what I'm looking at and what major problems could be awaiting if I don't sort this out sooner than later. I live in an area where the emissions laws are pretty lax, so if failing an emission test is my only concern, I won't panic,otherwise, any tips would be greatly appreciated. Thanks.