For 1990-2009 cars

Figure 1: |

#### L61

(1) | Onstar CIM
(2) | Sensing and Diagnostic Module
(3) | Data Link Communication
(4) | Body Control Module
(5) | Auto Climate Control Module
(6) | I/P Cluster
(7) | Powertrain Control Module
(8) | Electronic Brake Traction Control Module

Figure 2: |

#### L81

(1) | Onstar CIM
(2) | Sensing and Diagnostic Module
(3) | Data Link Communication
(4) | Body Control Module
(5) | Auto Climate Control Module
(6) | I/P Cluster
(7) | Powertrain Control Module
(8) | Body Control Module
(9) | Electronic Brake Traction Control Module