Engine Details • GMC 400CID (6.6L) GAS • 1970–80
Models
C15, C1500, C25, C2500, C2500 Suburban, C25 Suburban, C35, C3500, G15, G1500, G25, G2500, G35, G3500, Jimmy, K15, K1500, K1500 Suburban, K15 Suburban, K25, K2500, K2500 Suburban, K25 Suburban, K35, K3500, P15/P1500 Van, P25/P2500 Van, P35/P3500 Van, Sprint
Liters
6.6
CID
400
Fuel / Delivery
GAS / CARB
Cyl.
8
Version
-
VIN
E, K, M, N, P, R, S, T, U, X, Z
Desc.
-
Bore
4.12'' (104.7mm)
Stroke
-
Head
OHV
Asp.
N
Misc.
-
Available Part Categories
Please select to update the part list below:
Valve Seat for GMC 400CID (6.6L) GAS • 1970–80
12 parts found
| Part No. | Description | Quantity | Specs |
|---|---|---|---|
| 30530 | Int., with 1.720 Inch Valve Head Diameter | 8 | |
| 30530S | Package of 4 each of 30530 | 8 | |
| 30557 | Int., with 1.940 Inch Valve Head Diameter | 8 | |
| 30557S | Package of 4 each of 30557 | 8 | |
| 30664 | Exh., with 1.600 Inch Valve Head Diameter, '70 | 8 | |
| 30664+10 | Exh., .010 Inch Oversize, with 1.600 Inch Valve Head Diameter, '70 | 16 | |
| 30664S | Package of 4 each of 30664 | 8 | |
| 30664S+10 | Package of 4 each of 30664+10 | 16 | |
| 30838 | Exh., with 1.500 Inch Valve Head Diameter | 8 | |
| 30838S | Package of 4 each of 30838 | 8 | |
| 70838 | Exh., with 1.500 Inch Valve Head Diameter | 8 | |
| 70838S | Package of 4 each of 70838 | 8 |