SoundOff Signal mpower® 7x3 Light Cradle & Accessories one to change flash pattern Housing:Black W/Chrome Rear Cover fits_1999`Chevrolet`C1500`LS~1988-1992`Chevrolet`C1500`Scottsdale~1988-1998`Chevrolet`C1500`Silverado~1990-1998`Chevrolet`C1500`WT~1992-1999`Chevrolet`C1500 Suburban`Base~1995-1999`Chevrolet`C1500 Suburban`LS~1995-1997`Chevrolet`C1500 Suburban`LT PUTCO Chevrolet Silverado Ext WET431255SK

SoundOff Signal mpower® 7x3 Light Cradle & Accessories one to change flash pattern Housing:Black W Chrome Rear Cover fits_1999`Chevrolet`C1500`LS~1988 1992`Chevrolet`C1500`Scottsdale~1988 1998`Chevrolet`C1500`Silverado~1990 1998`Chevrolet`C1500`WT~1992 1999`Chevrolet`C1500 Suburban`Base~1995 1999`Chevrolet`C1500 Suburban`LS~1995 1997`Chevrolet`C1500 Suburban`LT PUTCO Chevrolet Silverado Ext WET431255SK one to change flash pattern and other for color mode This provides the service person with the ability to determine if the problem is internal with the siren or external with the wiring and speaker should the system fail to produce a warning signal