Some ignition modules are installed inside the distributor. But you need to disconnect the negative cable of the battery before you can take the ignition module off and replace it. You can refer to the circuit diagrams of specific and models of for vehicles// Product name: Ignition Spark Control Module Part Numbers:LX346T GD1998A 10476627 10489422 SH7378 D1928A 8104672020 8104894220 6H1040 10467202 Colour:black Material:ABS Fitment: for CENTURY 1987-2005 REGAL 1988-1996 RENDEZVOUS 2002-2005 1994-1998 for 1987-1988 for 1987-1996 1993-1995 CAVALIER 1987-1994 CELEBRITY 1987-1990 CORSICA 1987-1996 2000-2005 1990-2001 APV 1996 1997-2003 1995-2005 VENTURE 1997-2005 for PASSPORT 1994-1995 for RODEO 1993-1995, TROOPER 1992-1995 for ACHIEVA 1994-1998 ALERO 1999-2004 CUTLASS 1995-1999 CUTLASS CIERA 1987-1996 CUTLASS CRUISER 1987-1989 CUTLASS 1988-1997 FIRENZA 1987 SILHOUETTE 1996-2004 for 6000 1987-1991 2001-2005 1993-1995 GRAND AM 1994-2005 GRAND PRIX 1988-2003 Package Contents: 1 x Electronic Ignition Control Module Assembly Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.