Make:
GMC
Model:
C25
Submodel:
SIERRA CLASSIC
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA CLASSIC
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA CLASSIC
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA GRANDE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA GRANDE
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA GRANDE
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA GRANDE
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA GRANDE
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
BASE
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
BASE
Beginning Year:
1978
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
HIGH SIERRA
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
HIGH SIERRA
Beginning Year:
1978
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA CLASSIC
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA CLASSIC
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA CLASSIC
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA CLASSIC
Beginning Year:
1978
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA GRANDE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA GRANDE
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA GRANDE
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Liter:
5.7
CID:
350
Engine Family:
Chevy small block Gen I
Engine Size:
5.7L/350
Application Notes:
GAS; Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25 SUBURBAN
Submodel:
SIERRA GRANDE
Beginning Year:
1978
Ending Year:
1978
Engine Type:
V8
Liter:
6.6
CID:
400
Engine Family:
Chevy small block Gen I
Engine Size:
6.6L/400
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C35/C3500 PICKUP
Submodel:
BASE
Beginning Year:
1967
Ending Year:
1967
Engine Type:
V8
Liter:
4.6
CID:
283
CC:
4638
Engine Family:
Chevy small block Gen I
Engine Size:
4.6L/283
Application Notes:
Performance; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, Lower Engine Vacuum Than Stock,; Class 3, Rough Idle With Mid To High RPM Torque And Horsepower, Lower Engine Vacuum Than Stock, May Not Be Computer Compatible
Region:
USA