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. Compatible with Pontiac 6000 1990-1991, Bonneville 1992-1999, Firebird 1990-2002, Trans AM 1990-2002, Grand AM 1990-2000. Fit for Cadillac: Coupe DeVille 1988-1993, Cadillac DeVille 1988-1995, Cadillac Eldorado 1988-1991, Cadillac Escalade 1999-2002, Cadillac Seville 1988-1991. Replacement for Isuzu Hombre 1996-2001. Oldsmobile Achieva 1992-1995, Oldsmobile Bravada 1991-1997, Oldsmobile Cutlass Calais 1990-1991, Oldsmobile Cutlass Ciera 1988-1996, Oldsmobile Cutlass Supreme 1990-1994. Silverado radio wiring harness fit for GMC Envoy 1998-2001, GMC Jimmy 1994-2001, GMC Savana 1996-2000 GMC S-15 Sonoma 1993-2002, GMC Yukon 1992-2002. Buick: Buick Century 1988-1996, Buick Electra 1988-1990, Buick Le Sabre 1988-1994, Buick Park Avenue 1988-1994. GM radio harness compatible with Chevrolet Astro 1989-2005, Chevy S-10 Blazer 1989-2002, Chevy S-10 1989-2002, K1500/K2500/K3500 1995-1998, Chevy Silverado 1500 1999-2002, Chevy Suburban 1992-2002, Chevy Tahoe 1995-2002, Chevy Venture 1997-1999.