C4 Diagnostic Trouble Codes

Codes, Codes, Codes… Have you noticed “SYS” intermittently showing up in your 1990-1996 Corvette’s speedometer display?  This means there is a trouble code stored in one of the on-board control modules.  When the 1990 Corvette debuted, GM introduced ECM (Engine Control Module) and CCM (Central Control Module) trouble codes.   In addition, ABS/ASR (Anti-lock Brake System/Acceleration […]

Read More

Corvette C6 Battery Concerns

The C6 Corvette is a true World Class performance car with excellent “daily driver” attributes. Everywhere you look on the C6, an electronic device is operating something we had to either manually perform or think about previously. All of these electronic gadgets require stable voltage for long life. The days of removing the battery cable […]

Read More

Electrical Diagnosis

The following is a workbook from a technical seminar that we sponsored during Corvettes at Carlisle in 2007. The workshop was hosted by Chris Petris from Petris Enterprises in Scottsboro, AL. The concept is to provide easy to understand electrical troubleshooting concerning all Corvette generations in layman’s terms. We’ll show you how to do this […]

Read More