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GMC Workshop Service and Repair Manuals

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Reference Signal <--> [Cranking Signal]|Description and Operation|Page 3702 > < Engine Temperature Switch or Engine Temperature Sender|Page 3698

K 1500 Truck 4WD V8-454 7.4L (1988)

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Reference Signal: Description and Operation

This signal is used to inform the ECM that the engine is cranking. The ECM uses this information to tell when the engine is in the cranking mode.

Reference Signal <--> [Cranking Signal]|Description and Operation|Page 3702 > < Engine Temperature Switch or Engine Temperature Sender|Page 3698