Chevy Oil Sending Unit Wiring Diagram. 2 only install classic instruments sending units when the engine is cold. Speedo tach volt and oil pressure gauge wiring 1 always disconnect the vehicle battery before wiring any gauge.
I have a 87 s10 with a 99 57 vortec engine harness. In the diagram below for a 2004 silverado 53. Im not using the chevy oil pressure sending unit so i cant say for sure how that was originally setup to work my engine and pcm is from a 94 f body.
Chevrolet cavalier and sunfire repair manual haynes 1995 2001 download.
Oil pressure sending units 454 chevy. 2004 silverado wiring diagram for 1994 chevy silverado wiring diagram image size 800 x 593 px and to view image details please click the image. The indicator tells the driver of any problems with the oil pressure. My pcm definitely provides ground both for the 2 seconds after iginition is turned on as well as when the engine is cranking.