Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Yes there are a couple of locations much better than the stop lamp switch,
Notice S220 in the diagram the white wire coming from the brake switch splices here, It shows in the diagram a wire taped to harness, if you can find this it will work, another location is pin F6 in the conveince center, just to the left of the brake pedal against firewall.
IP harness, approx. 6 cm (2.5 in) from steering column harness breakout, toward C100