| Light Duty Emissions (8500 GVWR Or Less) |
| 2.2L (135") 4-Cyl. SFI | PCV, (4) EVAP, TWC, FR, EGR, SPK, HO2S, O2S, CEC, MIL EVAP-VC, EVAP-TPCV, EGR-CS, SPK-EST | 1 |
| 3.4L (208") V6 SFI | PCV, (4) EVAP, TWC+OC, FR, (5) EGR, SPK, (6) HO2S, CEC, MIL EVAP-VC, EVAP-CPCS, EVAP-TPCV, SPK-EST, SPK-ESC | 2 |
| 4.3L (262") V6 CSI | PCV, (4) EVAP, TWC, FR, (5) EGR, SPK, (7) HO2S, CEC, MIL (8) EVAP-CPCS, SPK-ESC, SPK-EST | 2 |
| 5.0L (305") V8 CSI | PCV, (4) EVAP, TWC, FR, (5) EGR, SPK, (7) HO2S, CEC, MIL EVAP-CPCS, EGR-EVRV, SPK-EST, SPK-ESC | 2 |
| 5.7L (350") V8 CSI | PCV, (4) EVAP, (6) TWC, FR, (5) EGR, SPK, (7) HO2S, CEC, MIL EVAP-CPCS, EGR-EVRV, SPK-EST, SPK-ESC | 2 |
| 7.4L (454") V8 CSI | PCV, (4) EVAP, OC, FR, EGR, SPK, (7) HO2S, CEC, MIL EVAP-CPCS, SPK-EST, SPK-ESC | 2 |
| Heavy Duty Emissions (8501 GVWR Or More) (3) |
| 4.3L (262") V6 CSI | PCV, (4) EVAP, OC, FR, (5) EGR, SPK, (7) HO2S, CEC, MIL EVAP-CPCS, EGR-CS, SPK-EST, SPK-ESC | 2 |
| 5.7L (350") V8 CSI | PCV, (4) EVAP, OC, FR, EGR, SPK, HO2S, CEC, MIL EVAP-CPCS, EGR-CS, SPK-EST, SPK-ESC | 1 |
| 7.4L (454") V8 TBI (VIN N) | PCV, ACL, (4) EVAP, TWC, FR, EGR, SPK, HO2S, CEC, MIL EVAP-CPCS, SPK-EST | 2 |
| 7.4L (454") V8 CSI (VIN J) | PCV, (4) EVAP, TWC, FR, EGR, SPK, (6) HO2S, CEC, MIL EVAP-CPCS, SPK-EST | 2 |
| (1) Major emission control systems and devices are listed in bold type. Components and other related devices are listed in light type. (2) See GENERAL MOTORS - TRUCKS in EGR FUNCTION TESTING section. Use specified test number. (3) For emission applications on gasoline-powered motor homes 8501 GVWR or more & built on a motor home chassis, see appropriate CLASS "A" MOTOR HOMES table. (4) Vapor canister type. (5) Linear EGR valve. (6) Equipped with 2. (7) Equipped with 4. (8) California only. |
