GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Preface 🢒 Cautions and Notices 🢒 Cruise Control Schematics
Figure 1:

Cruise Control System - 2.6L/3.2L/3.6L (LY9/LA3/LY7)
Object Number: 1326827 Size: FS
Master Electrical Component List
Cruise Control Description and Operation 2.6L, 3.2L and 3.6L
Cruise Control System - 5.7L (LS6)
Ignition Switch - 2 of 2
Underhood Fuse Block B+ Bus - 2 of 2
G104 - 1 of 2
Underhood Fuse Block STARTER and IGN 1 Relays, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block STARTER and IGN 1 Relays, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block WASH NOZ, STRG CTLS and IGN MOD/MAF Fuses
BPP Sensor, Switches and Indicators - 2.6L/3.2L/3.6L (LY9/LA3/LY7)
Class 2 Serial Data Bus - LHD - 1 of 2
G104 - 1 of 2
Figure 2:

Cruise Control System - 5.7L (LS6)
Object Number: 1347291 Size: FS
Master Electrical Component List
Cruise Control Description and Operation 5.7L
Cruise Control System - 2.6L/3.2L/3.6L (LY9/LA3/LY7)
Ignition Switch - 2 of 2
Underhood Fuse Block B+ Bus - 2 of 2
G104 - 1 of 2
Underhood Fuse Block STARTER and IGN 1 Relays, HTR VLV/CLTCH and TCM/IPC Fuses
Engine Data Sensors - Throttle Actuator Control (TAC) System
Class 2 Serial Data Bus - LHD - 1 of 2
Underhood Fuse Block STARTER and IGN 1 Relays, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block WASH NOZ, STRG CTLS and IGN MOD/MAF Fuses
BPP Sensor, Switches and Indicators - 5.7L (LS6)
G104 - 1 of 2
SIR Caution for Zoning