Question about 2002 GMC Yukon XL
You can determine if the ECM is the problem by making sure whether or not the Check engine light comes on momentarily as usual when you insert the key and turn it to the 'run' position.
If the CEL comes on momentarily as usual, then the ECM is not the problem.
More likely your problem is the fusible link which supplies power to both the fuel pump as well as the ignition module. This fusible link is located in on the fuse panel.
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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