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code p0724 shows up which represents a brake switch
where is this switch located on 2003 Cadillac DeVille DTS

can it be checked

Asked by for the 2003 Cadillac DeVille DTS
It is the torque convertor clutch switch in the transmission, and yes it can be checked with a scan tool, preferably a Tech2.
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It is the torque convertor clutch switch in the transmission, and yes it can be checked with a scan tool, preferably a Tech2.