October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Electronic Spark Control (ESC) Testing: Notes

NOTE: Electronic Spark Control (ESC) is used on some Chevrolet and GMC models using the 5.0L 4-Bbl. (VIN LE9) engine.

Fig 1: Wiring Diagram for HEI Sys. w/Electronic Spark Control (ESC)