For 1990-2009 cars

Figure 1: |

#### High Speed GMLAN (1 of 3)

Figure 2: |

#### High Speed GMLAN (2 of 3)

Figure 3: |

#### High Speed GMLAN (3 of 3)

Figure 4: |

#### Mid Speed GMLAN

Figure 5: |

#### Low Speed GMLAN

Figure 6: |

#### Chassis Speed GMLAN

Figure 7: |

#### Serial Data Communication Enable

Figure 8: |

#### Serial Data - LIN 1

Figure 9: |

#### Serial Data - LIN 2

Figure 10: |

#### Serial Data - LIN 3 and 4

Figure 11: |

#### Serial Data - LIN 6 and 7

Figure 12: |

#### Serial Data - LIN 8 (Memory)

Figure 13: |

#### Data Link