LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1991 >> Seville Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> General Motors A & C Chart Reference
April 5, 2026: LEMON Manuals is launched! Read the announcement.

General Motors A & C Chart Reference

GENERAL MOTORS A & C CHART REFERENCE

System or Component Diagnostic Information Location
A1 & A2, "SERVICE ENGINE SOON" Light See DIAGNOSTIC CIRCUIT CHECK In BASIC TESTING Article
A3, No Start See NO START - ENGINE CRANKS OKAY In BASIC TESTING Article
A5, Fuel Pump Relay See MOTORS, RELAYS & SOLENOIDS In This Article
A7, Fuel System Diagnosis See BASIC FUEL SYSTEM CHECKS In BASIC TESTING Article
C1, MAP Sensor See ENGINE SENSORS & SWITCHES In This Article
C1, Power Steering Pressure Switch See ENGINE SENSORS & SWITCHES In This Article
C1, Park/Neutral Switch See ENGINE SENSORS & SWITCHES In This Article
C2, Injector Balance Test See FUEL CONTROL In This Article
C2, IAC Motor See IDLE CONTROL SYSTEM In This Article
C2, ISC Motor See IDLE CONTROL SYSTEM In This Article
C3, Canister Purge System See EMISSION SYSTEMS & SUB-SYSTEMS In This Article
C4, EST Ignition Check See BASIC IGNITION SYSTEM CHECKS In BASIC TESTING Article
C4, DIS Ignition "Misfire" See DIS MISFIRE - 3.1L (VIN T) "W" BODY - C4F Chart  In This Article.
C5, ESC Ignition Check See IGNITION SYSTEM In This Article
C6, Air Injection System See EMISSION SYSTEMS & SUB-SYSTEMS In This Article
C7, EGR System See EMISSION SYSTEMS & SUB-SYSTEMS In This Article
C8, Torque Converter Clutch See MISCELLANEOUS ECM CONTROLS In This Article
C8, Manual Trans. Shift Lights See MISCELLANEOUS ECM CONTROLS In This Article
C10, A/C Clutch Control (1) See MISCELLANEOUS ECM CONTROLS In This Article
C12, Electric Cooling Fan Control (1) See MISCELLANEOUS ECM CONTROLS In This Article
(1) Also see ENGINE COOLING FAN article in the ENGINE COOLING section.