| 1.6L (97") 4-Cyl. 2-Bbl. | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, AP, O2S, CEC, EFE EVAP-VC, BP/EGR-TVS, SPK-CC, AP-AMV | 2 or 3 |
| 2.0L (122") 4-Cyl. TBI & Turbo | PCV, EVAP, TWC, FR, BP/EGR, SPK, O2S, CEC EVAP-VC, (3) BP/EGR-CS, SPK-CC | 2 or 3 |
| 2.5L (151") 4-Cyl. TBI | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, O2S, CEC EVAP-VC, SPK-CC | 2 or 3 |
| 2.8L (173") V6 MFI | PCV, EVAP, TWC, FR, EGR, SPK, (4) AIS, O2S, CEC EVAP-VC, EVAP-CPCV, SPK-CC | 6 |
| 3.0L (181") V6 MFI & 3.8L (231") V6 MFI | PCV, (5) ACL, EVAP, TWC, FR, BP/EGR, SPK, O2S, CEC EVAP-VC, BP/EGR-CS, SPK-EST | 2 or 3 |
| 4.3L (262") V6 TBI | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, AIS, O2S, CEC EVAP-VC, EVAP-CPCS, EVAP-CPCV, BP/EGR-CS, SPK-CC | 2 or 3 |
| 5.0L (305") V8 EFI | PCV, EVAP, TWC, FR, BP/EGR, SPK, AP, O2S, CEC EVAP-VC, EVAP-CPCS, EVAP-CPCV, BP/EGR-CS, SPK-CC, AP-AMV | 2 or 3 |
| 5.0L (305") V8 4-Bbl. | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, AP, O2S, CEC, EFE EVAP-VC, BP/EGR-CS, SPK-CC, AP-AMV, EFE-TVS | 2 , 3 or 7 |
| 5.0L (307") V8 4-Bbl. | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, AP, O2S, CEC, EFE EVAP-VC, BP/EGR-CS, SPK-CC, AP-AMV, EFE-TVS, TK | 2 , 3 or 7 |
| 5.7L (350") V8 EFI | PCV, ACL, EVAP, TWC, FR, BP/EGR, SPK, AP, O2S, CEC EVAP-VC, EVAP-CPCS, EVAP-CPCV, BP/EGR-CS, SPK-CC, AP-AMV, TK | 2 or 3 |
| (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 - CARS in EGR FUNCTION TESTING section. Use specified test number. (3) Turbo only. (4) M/T except Fiero. (5) 3.0L only. |
