Professional pure copper core made, which keeps excellent conductivity and safe use. RED WOLF car radio stereo harness is used to replace factory or broken stereo harness. Easy to use. Without cutting any OEM wiring harness. The use of heat shrinkable tube connection has a better effect. **NOTE**Not compatible with amp systems like Bose, Infinity, On-Star etc. GM radio wiring harness adapter is allowed to install an aftermarket radio using the existing factory wiring and connectors. Silverado radio wiring harness compatible with GMC mode:1995 - 1998 K1500,1995 - 1998 K2500, 1995 - 1998 K3500, 1995 - 1998 C1500, 1995 - 1998 C2500, 1995 - 1998 C3500, 1996 - 2005 Safari, 1996 - 2000 Savana 1500, 1996 - 2000 Savana 2500, 1996 - 2000 Savana 3500, 1999 - 2002 Sierra 1500, 1999 - 2002 Sierra 2500. Radio wiring harness GMC fit for CHEVROLET 1996 - 2005 Astro, 2002 Avalanche 1500, Express:1996 - 2000 1500, 1996 - 2000 2500,1996 - 2000 3500, 1995 - 1998 K1500,1995 - 1998 K2500,1995 - 1998 K3500,1995 - 1998 C1500,1995 - 1998 C2500,1995 - 1998 C3500, Silverado: 1999 - 2002 1500, 1999 - 2002 2500, 2001 - 2002 3500, Suburban: 2000 - 2002 1500,2000 - 2002 2500,1995 - 1999 K1500, 1995 - 1999 K2500, 1995 - 1999 C1500, 1995 - 1999 C2500. 1995 - 2002 Tahoe.