Due to Federal government requirements, manufacturers may use names and acronyms for systems and components different than those used in previous years. The following table will help eliminate confusion when dealing with these components and systems. Only relevant components and systems whose names have changed from current General Motors Corp. terminology have been listed.
| Former Name Or Acronym | New Name Or Acronym |
|---|---|
| ALDL | Data Link Connector (DLC) |
| CHECK ENGINE Light | Malfunction Indicator Light (MIL) |
| CTS | Engine Coolant Temperature Sensor |
| Diagnostic Circuit Check | On-Board Diagnostic (OBD) System Check |
| ESC System | Knock Sensor (KS) System |
| EST System | Ignition Control (IC) System |
| MAT Sensor | Intake Air Temperature (IAT) Sensor |
| Park/Neutral (P/N) Switch | Park/Neutral Position (PNP) Switch |
| Port Fuel Injection | Multiport Fuel Injection |
| Scan Data | Scan Tool (ST) Data |
| SERVICE ENGINE SOON Light | Malfunction Indicator Light (MIL) |
| Thermostatic Air Cleaner (TAC) | Air Cleaner (ACL) |
| Throttle Position Sensor (TPS) | Throttle Position (TP) Sensor |
| Throttle Position Switch | Closed Throttle Position (CTP) Switch |
| Throttle Position Switch | Wide Open Throttle (WOT) Switch |
| Viscous Converter Clutch (VCC) | Torque Converter Clutch (TCC) |
SAE TERMINOLOGY