Well i been having some problems with my 99 blazer and im thinking maybe i need a new ecm. i replaced the fuel injector assembly cause reg was leaking, that was one of many things replaced. But now im getting codes like ,po751,pi441,uio42,po605,u1192and so on. what do ya think?

 

What are the symptoms?

Check all your ECM power and grounds first.

George

 

Thats my next thing to check is grounds and supply leads,