When the fourth generation Corvette was introduced in 1984, many innovative build techniques were implemented. Early Corvette amenities were becoming standard equipment while new options filled every available inch of dash space. The 1984-1989 C4 dash had more modules and controllers to integrate behind an already tight dash area. 1990-1996 Corvettes added more modules along […]
Tag: ABS
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 […]