1975-79 CADILLAC

Year, Engine & Fuel System		Emission Control Systems & Devices	Remarks
1975
	8.2L (500") V8 4-Bbl.	PCV (1) , TAC, AIS (2) , EVAP, OC, EGR (2)  , BPS(2), EFE, TVS	(1) Type 4 closed. (2) Used on all Calif. models & all commercial chassis with 145 amp alternator.
	8.2L (500") V8 EFI	PCV (1) , TAC, AIS (2) , EVAP, OC, EGR  , BPS, TVS
1976
	5.7L (350") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR  , BPS, EFE, TVS	(3) Used on all Calif. models & all commercial chassis with 145 amp. alternator.
	8.2L (500") V8 4-Bbl.	PCV, TAC, AIS (3) , EVAP, OC, EGR (3)  , BPS(3), EFE, TVS
	8.2L (500") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR  , BPS, TVS
1977
	5.7L (350") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR  , SPK, SD(4)	(4) Calif. only.
	7.0L (425") V8 4-Bbl.	PCV, TAC, AIS 3  , EVAP, OC, BP/EGR, SPK
	7.0L (425") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR, SPK  , SD(4)
1978
	5.7L (350") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR  , DS TVS(5), DV, ESS(6)	(5) Calif. Seville only. (6) Seville only. (7) Exc. Federal. (8) Exc. Calif. DeVille & Brougham. (9) Calif. DeVille & Brougham only.
	7.0L (425") V8 4-Bbl.	PCV, TAC, AIS (7) , EVAP, OC, BP/EGR  , DS-TVS, DV, EFE, EFE-TVS, EGR-TVS, SVB-TVS(8), TAC-TVS(8)
	7.0L (425") V8 EFI	PCV, AIS, EVAP, OC, BP/EGR  , BPT, DS-TVS, DV, DVAS(9)
1979
	5.7L (350") V8 EFI (VIN B)	PCV, AIS (11) , EVAP, OC, BP/EGR, SPK (16)  , APDV(10), BPT, DTVS(12), ESS, MAP	(10) Federal Seville only. (11) Not used on Calif. Seville. (12) Not used on Federal Seville. (13) Not used on Federal DeVille & Brougham. (14) Used on Federal DeVille & Brougham only. (15) Not used on Federal or High Alt. DeVille & Brougham. (16) Calif. & High Alt. only.
	7.0L (425") V8 4-Bbl. (VIN S)	PCV, TAC, AIS 4, EVAP, OC, BP/EGR, SPK  , APDV(13), EFE, EFE-TVS(13), EGR-DTVS, EGR-TCV, EGR-TVSs, ESS 6, TVS
	7.0L (425") V8 EFI (VIN T)	PCV, AIS, EVAP, OC, BP/EGR, SPK (16)  , APDV, BPT, DTVS, DVAS, MAP

ACV  - Air Control Valve

AICV  - Air Injection Control Valve

AIS  - Air Injection System

AMgV  - Air Management Valve

APCV  - Air Pump Control Valve

APDV  - Air Pump Diverter Valve

ASS  - Air Switching Solenoid

ASV  - Air Switching/Solenoid Valve

ATS  - Air Temp. Sensor

BP/EGR  - Backpressure EGR

BPS  - Backpressure Sensor

BPT  - Backpressure Transducer

BPV  - By-Pass/Backpressure Valve

C ³  I  - Computer Controlled Ignition Coil

CAN  - Charcoal Canister

CCS  - Controlled Combustion System

CDR  - Crankcase Depression Relief

CEC  - Computerized Engine Control

CKV  - Check Valve

CP  - Canister Purge

CPS  - Canister Purge Solenoid

CPV  - Canister Purge Valve

CV  - Control Valve

DBC  - Dual Bed Catalytic

DCLV  - Deceleration Valve

DFI  - Digital Fuel Injection

DLV  - Delay Valve

DS-TVS  - Dist. Spark Thermal Vac. Switch

DTVS  - Dist. Thermal Vac. Switch

DV  - Diverter Valve

DVAS  - Dist. Vac. Advance Solenoid

EFE  - Early Fuel Evaporation

EFE-TVS  - EFE Thermal Vac. Switch

EFI  - Electronic Fuel Injection

EGR  - Exhaust Gas Recirculation

EGRCS  - EGR Control Solenoid

EGR-TCV  - EGR Therm. Control Valve

EGR-TVS  - EGR Therm. Vac. Switch

EGR-DCTO  - EGR Dual Cool. Temp. Override

EPR  - Exhaust Pressure Regulator

ESC  - Electronic Spark Control

ESS  - Electronic Spark Selection

ETS  - Engine Temp. Switch

EVAP  - Evaporative Emission Control

EVRV  - Electronic Vac. Regulator Valve

EVS  - Economy Vac. Switch

MAP  - Manifold Absolute Press. Sens.

MPFI  - Multi-Port Fuel Injection

NLV  - Non-Linear Valve

OC  - Oxidation Catalyst

ORC-OC  - Oxidation Reduction Catalytic-Oxidizing Converter

O ₂  - Oxygen Sensor

PAS  - Pulse Air Solenoid

PCV  - Positive Crankcase Ventilation

PEVR  - Power Enrichment Vac. Regulator

PFI  - Port Fuel Injection

PR-CV  - Pressure Control Valve

PSV  - Pulse Air Shutoff Valve

PV  - Pulse Air Valve

R-DLV  - Retard Delay Valve

RLY  - Relay

SAVM  - Spark Advance Vac. Modulator

SBC  - Single Bed Catalytic

SCS  - Speed Control Switch

SD  - Spark Delay

SOL  - Solenoid

SOL-ASS  - Solenoid Assembly

SVB  - Secondary Vac. Break

SWV  - Switching Valve

TAC  - Thermostatic Air Cleaner

TAC-TVS  - TAC Therm. Vac. Switch

TBI  - Throttle Body Injection

TBVV  - Thermal Bowl Vent Valve

TCS  - Transmission Controlled Spark

TCV  - Thermal Control Valve

TK  - Throttle Kicker

TP-CV  - Tank Pressure Control Valve

TPS  - Throttle Position Switch

TPI  - Tuned Port Injection

TRV  - Transmission Vac. Valve

TVM  - Transmission Vac. Modulator

TVS  - Thermal Vacuum Switch

TVV  - Thermal Vac. Valve

TWC  - Three-Way Catalytic

VB  - Vacuum Break

VCK-V  - Vacuum Check Valve

VCS  - Vacuum Control Switch

VDV  - Vacuum Delay Valve

VM-CV  - Vac. Modulator Check Valve

VMV  - Vac. Modulator Valve

VP  - Vacuum Pump

VRES  - Vacuum Reservoir

VRS  - Vacuum Retard Switch

VRV  - Vacuum Regulator Valve

VS  - Vacuum Switch

VSENS  - Vacuum Sensor

VSS  - Vac. Switching Solenoid

VSV  - Vac. Switching Valve