1975-79 CHEVROLET

Year, Engine & Fuel System

Emission Control Systems & Devices

Remarks

1975

2.3L(140") 4-Cyl. 1-Bbl.⁽⁴⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR, SPK , EFE, TCS ⁽²⁾

⁽¹⁾	Type 4 closed.

⁽²⁾

M/T only.

⁽³⁾	Calif. only.

⁽⁴⁾	Federal only.

⁽⁵⁾	RPO LM1 (155 HP) only.

⁽⁶⁾	RPO L48(165 HP) & L82 (205 HP) only.

⁽⁷⁾

A/T only.

⁽⁸⁾

M/T only.

2.3L (140") 4-Cyl. 2-Bbl.

PCV ⁽¹⁾ , TAC, AIS 3, EVAP, OC, EGR , SPK, CCS 4, EFE, TCS⁽³⁾

4.2L (250") 6-Cyl. 1-Bbl.⁽⁴⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR , CCS, EFE

4.2L (250") 6-Cyl. 1-Bbl.⁽³⁾⁽⁷⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR , CAI, EFE

4.3L (262") V8 2-Bbl.

PCV ⁽¹⁾ , TAC, AIS ⁽³⁾ , EVAP, OC, EGR , CCS⁽⁴⁾, EFE

5.7L (350") V8 2-Bbl.⁽⁴⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR , CCS, EFE

5.7L (350") V8 4-Bbl.⁽⁶⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR , CAI⁽³⁾, CCS⁽⁴⁾, EFE

5.7L (350") V8 4-Bbl.⁽⁶⁾

PCV ⁽¹⁾ , TAC, AIS, EVAP, OC, EGR , EFE

6.5L (400") V8 4-Bbl.⁽⁷⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR , CAI⁽³⁾, CCS⁽⁴⁾, EFE

7.5L (454") V8 4-Bbl.⁽⁴⁾⁽⁷⁾

PCV ⁽¹⁾ , TAC ⁽⁴⁾ , EVAP, OC, EGR , CCS, EFE

1976

1400 cc 4-Cyl. 1-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, ISS

⁽⁹⁾

M/T only.

⁽¹⁰⁾

A/T only.

⁽¹¹⁾	Exc. VIN U.

⁽¹²⁾	Calif. only.

⁽¹³⁾	Federal only.

1400 cc 4-Cyl. 1-Bbl.⁽¹²⁾

PCV, TAC, AIS, EVAP, OC, EGR , DVD, EGR-TVS, ISS

1600 cc 4-Cyl. 1-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, ISS

1600 cc 4-Cyl. 1-Bbl.⁽¹²⁾

PCV, TAC, AIS, EVAP, OC, EGR , DVD, EGR-TVS, ISS

2000 cc Cosworth 4-Cyl. EFI

PCV, AIS, EVAP, OC

2300 cc 4-Cyl. 1-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR, SPK , CCS, ISS, TCS⁽⁹⁾

2300 cc 4-Cyl. 2-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR, CCS, ISS, TCDV ⁽¹⁰⁾

2300 cc 4-Cyl. 2-Bbl.⁽¹³⁾

PCV, TAC, AIS, EVAP, OC, EGR , ISS, TCDV⁽¹⁰⁾

4.2L (250") 6-Cyl. 1-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, EFE, ISS

4.2L (250") 6-Cyl. 1-Bbl.⁽¹⁰⁾⁽¹²⁾

PCV, TAC, AIS, EVAP, OC, EGR , EFE, EGR-TVS, ISS

4.3L (262") V8 2-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, EFE

5.0L (305") V8 2-Bbl.⁽¹⁰⁾⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, EFE, EGR-TVS

5.0L (305") V8 2-Bbl.⁽¹⁰⁾⁽¹²⁾

PCV, TAC, AIS ⁽¹¹⁾ , EVAP, OC, EGR , EFE, EGR-TVS

5.7L (350") V8 2-Bbl.⁽¹³⁾

PCV, TAC, EVAP, OC, EGR , CCS, EFE, EGR-TVS

5.7L (350") V8 4-Bbl.

PCV, TAC, AIS, EVAP, OC, EGR , CAI, EFE, EGR-TVS

6.5L (400") V8 4-Bbl.⁽¹⁰⁾

PCV, TAC, AIS, EVAP, OC, EGR , CAI, EFE, EGR-TVS

7.5L (454") V8 4-Bbl.⁽¹⁰⁾⁽¹³⁾

PCV, TAC, AIS, EVAP, OC, EGR , EFE, EGR-TVS

1977

1400 cc 4-Cyl. 1-Bbl.

PCV, TAC, EVAP, OC, EGR

⁽¹⁴⁾	Calif. only.

⁽¹⁵⁾	Calif. & High Alt.

1600 cc 4-Cyl. 1-Bbl.

PCV, TAC, AIS ⁽¹⁴⁾ , EVAP, OC, EGR

2.3L (140") 4-Cyl. 2-Bbl.

PCV, TAC, AIS, EVAP, OC, EGR

4.2L (250") 6-Cyl. 1-Bbl.

PCV, TAC, AIS ⁽¹⁵⁾ , EVAP, OC, EGR , EFE

5.0L (305") V8 2-Bbl.

PCV, TAC, AIS ⁽¹⁵⁾ , EVAP, OC, EGR , EFE, SD⁽¹⁴⁾

5.7L (350") V8 4-Bbl.

PCV, TAC, AIS ⁽¹⁵⁾ , EVAP, OC, EGR , EFE

1978

1600 cc 4-Cyl. 1-Bbl.

PCV, TAC, AIS ⁽¹⁶⁾ , EVAP, OC, EGR

⁽¹⁶⁾	Calif. & High Alt.

⁽¹⁷⁾	Calif. 6510-C 2-Bbl. only

⁽¹⁸⁾	Federal only.

⁽¹⁹⁾	Calif. only.

2.5L (151") 4-Cyl. 2-Bbl.

PCV, TAC, EVAP, TWC, EGR, SPK, CEC , CVB, DTVS, ECU⁽¹⁷⁾, EFC⁽¹⁹⁾, EFE, VDV

3.2L (196") V6 2-Bbl.⁽¹⁸⁾

PCV, TAC, EVAP, OC, EGR, EFE

3.3L (200") V6 2-Bbl.⁽¹⁸⁾

PCV, TAC, EVAP, OC, EGR, SPK , EFE, TS

3.8L (231") V6 2-Bbl.

PCV, TAC, AIS ⁽¹⁶⁾ , EVAP, OC, EGR , CP-TVS, EFE

4.2L (250") 6-Cyl. 1-Bbl.

PCV, TAC, AIS ⁽¹⁹⁾ , EVAP, OC, EGR, SPK , EFE, TS

5.0L (305") V8 2-Bbl.

PCV, TAC, AIS ⁽¹⁶⁾ , EVAP, OC, EGR, SPK , EFE, SDV⁽¹⁹⁾

5.7L (350") V8 4-Bbl.

PCV, TAC, AIS ⁽¹⁶⁾ , EVAP, OC, EGR , EFE

1979

1.6L (98") 4-Cyl. 2-Bbl.

PCV, TAC, AIS ⁽²⁰⁾ , EVAP, OC, EGR , DCLV⁽²⁰⁾, DVDV, EGR-TVS⁽²⁰⁾ TVS

⁽²⁰⁾	Calif. & High Alt.

⁽²¹⁾	Calif. only.

⁽²²⁾	Federal only.

⁽²³⁾	Calif. M/T only.

⁽²⁴⁾	Not used on Monza.

⁽²⁵⁾	Except some Fed. VIN 8.

⁽²⁶⁾	Used on some VIN 4 only.

2.5L (151") 4-Cyl. 2-Bbl. (VIN V)

PCV, TAC, EVAP, TWC, EGR, SPK , DS-TVS, DS-VDV, EGR-TVS

2.5L (151") 4-Cyl. 2-Bbl. (VIN 1)

PCV, TAC, EVAP, TWC, EGR, SPK , CDV, CEAB-TVV, DS-TVV, EFE, EFE-TVV, VCK V, VIS, VRS

3.2L (196") V6 2-Bbl. (VIN C)⁽²²⁾

PCV, TAC, EVAP, OC, EGR, SPK , DTVS, EFE-CV, EFE-TVS, EGR-TVS, SAVM

3.3L (200") V6 2-Bbl. (VIN M)⁽²²⁾

PCV, TAC, EVAP, OC, EGR, SPK , CP-TVS, DTVS, EFE, EFE-TVS, EGR-TVS

3.8L (231") V6 2-Bbl. (VIN A)

PCV, TAC, AIS ⁽²⁰⁾ , EVAP, OC/TWC ⁽²¹⁾ , BP/EGR, CEC ⁽²¹⁾ , APDV⁽²⁰⁾, CP-TVS, DTVS, DVDV⁽²³⁾, EFE, EFE-CV, EFE-TVS, EGR-TVS, SAVM, TAC-TCV

4.2L (250") 6-Cyl. 1-Bbl.

PCV, TAC, AIS ⁽²⁸⁾ , EVAP, OC, EGR , APDV⁽²⁸⁾, DVDV⁽²⁹⁾, DV-TVS⁽²⁸⁾, EFE-TVS, EGR-TVS

⁽²⁷⁾	Calif. & High Alt.

⁽²⁸⁾	Calif. only.

⁽²⁹⁾	Federal only.

⁽³⁰⁾	Calif. M/T only.

⁽³¹⁾	Not used on Monza.

⁽³²⁾	Except some Fed. VIN 8.

⁽³³⁾	Used on some VIN 4 only.

4.3L (267") V8 2-Bbl. (VIN J)⁽²⁹⁾

PCV, TAC, EVAP, OC, EGR , CP-TVS, DTVS, EFE-TVS, EGR-TVS, VCK V

5.0L (305") V8 2-Bbl. (VIN G)

PCV, TAC, AIS ⁽²⁸⁾ , EVAP, OC, EGR , APDV⁽²⁸⁾, CP-TVS, DTVS⁽³¹⁾, EFE-TVS, EGR-TVS, VCK V

5.0L (305") V8 4-Bbl. (VIN H)

PCV, TAC, AIS ⁽²⁷⁾ , EVAP, OC, EGR , APDV⁽²⁷⁾, CP-TVS, DTVS⁽²⁹⁾, EFE-TVS, EGR-TVS, VCK V

5.7L (350") V8 4-Bbl. (VIN L)

PCV, TAC, AIS ⁽²⁸⁾ , EVAP, OC, EGR , APDV⁽²⁷⁾, CP-TVS, DTVS, EGR-TVS, VCK V

5.7L (350") V8 4-Bbl. (VIN 4 & 8)

PCV, TAC, AIS ⁽⁾ , EVAP, OC, EGR , APDV⁽³²⁾, CP-TVS, DTVS⁽³³⁾, EFE-TVS, EGR-TVS, VCK V

1979 1/2 Citation

2.5L (151") 4-Cyl. 2-Bbl. (VIN 5)

PCV, TAC, EVAP, TWC, EGR, SPK , DS-TVS, DS-VDV, DS-VRV⁽³⁴⁾ EGR-TVS

⁽³⁴⁾	Not used in Calif.

⁽³⁵⁾	Calif. only.

⁽³⁶⁾	Federal only.

2.8L(173") V6 2-Bbl. (VIN 7)⁽³⁶⁾

PCV, TAC, AIS, EVAP, TWC, EGR, SPK , CP-TVS, DCLV, DS-TVS, EFE, EFE-CV, EFE-TVS, EGR-TVS, SVB-TVS

2.8L (173") V6 2-Bbl. (VIN 7)⁽³⁵⁾

PCV, TAC, AIS, EVAP, TWC, BP/EGR, SPK , AIS-SOL, CP-TVS, DCLV, DS-TVS, DS-VDV, EFE, EFE-CV, EFE-TVS, EGR-TVS, SVB-TVS

AAV - Auxiliary Air Valve

ACV - Air Control Valve

AIS - Air Injection System

AIS-SOL - AIS Solenoid

AMgV - Air Management Valve

APCV - Air Pump Control Valve

APDV - Air Pump Diverter Valve

ASS - Air Switching Solenoid

ASV - Air Switching Valve

ATS - Air Temp. Switch

BP/EGR - Backpressure EGR

BPS - Backpressure Sensor

BPT - Backpressure Transducer

BPV - By-Pass Valve

BVSV - Vac. Switching Valve

CANCV - Canister Control Valve

CAI - Catalyst Air Injection

CCS - Controlled Combustion

CCV - Canister Control Valve

CDR - Crankcase Depression Relief

CEAB - Cold Engine Air Bleed

CEC - Computerized Engine Control

CEC - Combined Emission Control Valve

CESS - Cold Engine Sensor Switch

CFI - Cross Fire Injection

CKV - Check Valve

CP - Canister Purge

CP-SOL - Canister Purge Solenoid

CPS - Canister Purge Solenoid

CPV - Canister Purge Valve

CTS - Coolant Temp. Sensor

CTVS - Choke Thermal Vac. Switch

CV - Control Valve

CVB - Choke Vac. Break

CVB VDV - Choke Vac. Break/Vac. Delay Valve

DBC - Dual Bed Catalytic

DCLV - Deceleration Valve

DFCV - Deceleration Fuel Cut-Off Valve

DLV - Delay Valve

DP - Dash Pot

D-PVS - Distributor Ported Vac. Switch

DS - Distributor Spark

DS-TVS - Distributor Spark Thermal Vac. Switch

DS-VDV - Distributor Spark Vac. Delay Valve

DS-VRV - Distributor Spark Vac. Reducer Valve

DTVS - Distributor Thermal Vac. Switch

DV - Diverter Valve

DVAS - Distributor Vac. Advance Solenoid

DVD - Differential Vac. Delay Valve

DVDV - Distributor Vac. Delay Valve

DVRV - Distributor Vac. Regulating Valve

EBCV - Electronic Air Bleed Control Valve

ECU - Electronic Control Unit

EFC - Electronic Fuel Injection

EFE - Early Fuel Evaporation

EFE-PVS - EFE Ported Vac. Switch

EFE-TVS - EFE Thermal Vac. Switch

EGR - Exhaust Gas Recirculation

EGR/BPS - EGR Backpressure Sensor

EGRCS - EGR Control Solenoid

EGR-CV - EGR Control Valve

EGR-PVS - EGR Ported Vac. Switch

EGR-TS - EGR Temp. Switch

EGR-TVS - EGR Thermal Vac. Switch

EGR-VM - EGR Vac. Modulator

EPR - Exhaust Pressure Regulator

ESC - Electronic Spark Control

ESS - Electronic Spark Selection

ESSM - Engine Speed Switch Module

ETS - Engine Temp. Switch

EVAP - Evaporative Emission Control

FIA - Fast Idle Actuator

FISR - Fast Idle Solenoid Relay

HAC - High Alt. Compensator

ISS - Idle Stop Solenoid

KS - Knock Sensor

MAFS - Mass Airflow Sensor

MAP - Manifold Absolute Pressure Sensor

NLV - Non-Linear Valve

O ₂ - Oxygen Sensor

OC - Oxidation Catalytic

ORC-OC - Oxidation Reduction Catalytic

PAS - Pulse Air Solenoid

PCV - Positive Crankcase Ventilation

PEVR - Power Enrichment Vac. Regulator

PFI - Ported Fuel Injection

PR-CV - Pressure Control Valve

PSV - Pulse Air Shutoff Valve

PV - Pulse Air Valve

PVA - Ported Vac. Advance

PVS - Ported Vac. Switch

R-DLV - Retard Delay Valve

RLY - Relay

SAVM - Spark Advance Vac. Modulator

SBC - Single Bed Catalytic

SD - Spark Delay

SDV - Spark Delay Valve

SEC-ACT - Secondary Actuator

SOL - Solenoid

SPK - Spark Control

SRDV - Spark Retard Delay Valve

SSC-ACT - Stepped Speed Control Actuator

SSC-SOL - Stepped Speed Control Solenoid

SVB - Secondary Vac. Break

SWV - Switching Valve

TAC - Thermostatic Air Cleaner

TBI - Throttle Body Injection

TBVV - Thermal Bowl Vac. Valve

TCDV - Thermal Check & Delay Valve

TCS - Transmission Controlled Spark

TCV - Thermal Check/Control Valve

TK - Throttle Kicker

TP-CV - Tank Pressure Control Valve

TPI - Tuned Port Injection

TRV - Transmission Vac. Valve

TS - Trapped Spark

TVIS - Throttle Vac. Idle Speed Diaphragm

TVS - Thermal Vac. Switch

TVV - Thermal Vac. Valve

TWC - Three-Way Catalytic

VAV - Vac. Advance Valve

VB - Vacuum Break

VCK V - Vac. Check Valve

VCS - Vac. Control Switch

VCV - Vac. Control Valve

VDV - Vac. Delay Valve

VIS - Vac. Input Switch

VL-DV - Vac. Delay Valve

VM-CV - Vac. Modulator Check Valve

VMV - Vac. Modulator Valve

VP - Vac. Pump

VRS - Vac. Retard Switch

VRV - Vac. Relay/Regulator Valve

VS - Vac. Switch

VSENS - Vac. Sensor

VSS - Vac. Switching Solenoid

VSV - Vac. Switching Valve

VSV - Idle-Up Solenoid Valve

WSTGT - Wastegate Actuator