RPO codes can be found in the glove box, on the trunk lid or hatch, or on the drivers side door jam near the latch. If you find the RPO code & it does not match one listed above for your particular vehicle, you should not use this harness. INST70-2054 GMC - Envoy 2000-01 w/ Bose System..................................................9 - Envoy 2002-04 w/ RPO code UQA...............................................8 - Envoy XL 2003-04 w/ RPO code UQA.........................................8 - Jimmy 2000-02 w/ Bose System...............................................9 - Sierra 2003-06 w/ RPO code UQ7 w/o Y91.................................5 - Sonoma 2000-02 w/ Bose System..............................................9 - Yukon Denali 2000 w/ Luxury System.........................................3 - Yukon/XL/Denali 2001-02 w/ RPO code Y91................................4 - Yukon/XL 2003-06 w/ RPO code UQ7 w/o Y91............................5 HUMMER - H2 2004-07 w/ RPO code UQ7 w/o Y91......................................5 ISUZU - Ascender 2003-04 w/ RPO code UQA..........................................8 OLDSMOBILE - Aurora 2001 w/ RPO code U80....................................................6 - Aurora 2002-03 w/ RPO code U80..............................................7 - Bravada 1998-01 w/ Bose System..............................................9 - Bravada 2002-04 w/ RPO code UQA...........................................8 - Intrigue 2000-01 w/ RPO code U85............................................6 - Intrigue 2002 w/ RPO code U85..................................................7 PONTIAC - Bonneville 2000-01 w/ RPO code U80........................................6 - Grand Prix 1998-01 w/ RPO code U85........................................6 - Grand Prix 2002-03 w/ RPO code U85........................................7 NOTE RPO codes tell what options & accessories a vehicle has. RPO codes can be found in the glove box, on the trunk lid or hatch, or on the drivers side door jam near the latch. If you find the RPO code & it does not match one listed above for your particular vehicle, you should not use this harness. INST70-2054 AMPLIFIER LOCATIONS CADILLAC - CTS 2003-04 W/ RPO CODE U57...........................BEHIND DRIVERS SIDE REAR PANEL IN TRUNK - DEVILLE 2000-04 W/ RPO CODE UX8.........................................................BEHIND REAR SEAT - ESCALADE 2000 W/ LUXURY SYSTEM...................................................UNDER CENTER CONSOLE - ESCALADE 2002 W/ RPO CODE Y91....................................BEHIND DRIVERS SIDE REAR PANEL - ESCALADE EXT 2002 W/ RPO CODE Y91................................................UNDER CENTER CONSOLE - SEVILLE 1998-04 W/ RPO CODE UX8.........................................................BEHIND REAR SEAT - SRX 2004 W/ RPO CODE U57.....................................BEHIND PASSENGER SIDE REAR PANEL - XLR 2004 W/ BOSE SYSTEM.................................ON PASSENGER SIDE FLOOR UNDER CARPET CHEVROLET - AVALANCHE 2002 W/ RPO CODE Y91..................................................UNDER CENTER CONSOLE - AVALANCHE 2003-04 W/ RPO CODE UQ7 W/O Y91...................................UNDER CENTER CONSOLE - BLAZER 2000-02 W/ BOSE SYSTEM.................................................UNDER CENTER CONSOLE - S-10 2000-02 W/ BOSE SYSTEM...................................................UNDER CENTER CONSOLE - SIVERADO 2003-04 W/ RPO CODE UQ7 W/O Y91....................................UNDER CENTER CONSOLE - SUBURBAN 2001-02 W/ RPO CODE Y91.................................BEHIND DRIVERS SIDE REAR PANEL - SUBURBAN 2003-04 W/ RPO CODE UQ7 W/O Y91...................................UNDER CENTER CONSOLE - TAHOE Z71/LIMITED 2000 W/ LUXURY SYSTEM......................................UNDER CENTER CONSOLE - TAHOE 2001-02 W/ RPO CODE Y91......................................BEHIND DRIVERS SIDE REAR PANEL - TAHOE 2003-04 W/ RPO CODE UQ7 W/O Y91........................................UNDER CENTER CONSOLE - TRAILBLAZER 2002-04 W/ RPO CODE UQA..........................BEHIND PASSENGER SIDE REAR PANEL - TRAILBLAZER EXT 2003-04 W/ RPO CODE UQA.......................BEHIND DRIVERS SIDE REAR PANEL NOTE Many factory amplifiers are now incorporating the crossovers for the tweeters and subwoofers within the amplifier. When bypassing the factory amplifier, you need to cross over those speakers with either passive crossovers or use an after-market AMP with built in crossovers. -,i I,— INST70-2054 AMPLIFIER LOCATIONS GMC - ENVOY 2000-01 W/ BOSE SYSTEM.................................................BEHIND CENTER CONSOLE - ENVOY 2002-04 W/ RPO CODE UQA...................................BEHIND PASSENGER SIDE REAR PANEL - ENVOY XL 2002-04 W/ RPO CODE UQA..................................BEHIND DRIVERS SIDE REAR PANEL - ENVOY XUV 2004 W/ RPO CODE UQA.......................................BEHIND DIVERS SIDE REAR PANEL - JIMM...