GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power, Ground, and Key Word 2000 Serial Data


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Figure 2:

Low Speed GMLAN Serial Data 1 of 2


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Figure 3:

Low Speed GMLAN Serial Data 2 of 2


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Figure 4:

High Speed GMLAN


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Figure 5:

Serial Data Communication Enable


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