Make:

GMC

Model:

C25

Submodel:

BASE

Beginning Year:

1975

Ending Year:

1975

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Z

Region:

USA

Make:

GMC

Model:

C25

Submodel:

BASE

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

BASE

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Y

Region:

USA

Make:

GMC

Model:

C25

Submodel:

BASE

Beginning Year:

1977

Ending Year:

1978

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

HIGH SIERRA

Beginning Year:

1975

Ending Year:

1975

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Z

Region:

USA

Make:

GMC

Model:

C25

Submodel:

HIGH SIERRA

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

HIGH SIERRA

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Y

Region:

USA

Make:

GMC

Model:

C25

Submodel:

HIGH SIERRA

Beginning Year:

1977

Ending Year:

1978

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA CLASSIC

Beginning Year:

1975

Ending Year:

1975

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Z

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA CLASSIC

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA CLASSIC

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Y

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA CLASSIC

Beginning Year:

1977

Ending Year:

1978

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA GRANDE

Beginning Year:

1975

Ending Year:

1975

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Z

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA GRANDE

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA GRANDE

Beginning Year:

1976

Ending Year:

1976

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

Y

Region:

USA

Make:

GMC

Model:

C25

Submodel:

SIERRA GRANDE

Beginning Year:

1977

Ending Year:

1978

Engine Type:

V8

Liter:

7.4

CID:

454

Engine Family:

Chevy big block Mark IV

Engine Size:

7.4L/454

Drivetrain:

RWD

Application Notes:

Universal Converter; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit; Federal and California Emissions, Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details., Pre-OBDII Heavy Duty Unit

Engine VIN Code:

S

Region:

USA