Chevy Problems

Chevy's main problems are coming from after market upgrade and performance modules. Problems also come in from overheated aluminum head gaskets then a dramatic cool down, this would scrap the coating off the head gaskets this allows combustion to leak into coolant passages. This also leads to undue pressure in the cooling system and engine oil contamination. They have also found some bad information on cracked injectors and high engine temperatures.http://www.ehow.com/about_5985935_problems-duramax.html