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Access GMC  wiring diagrams and repair procedures. Learn how to repair, install or remove a part, reset engine lights...
 
GMC 400 Engine (V8, 400 cid, 6.6L)
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This GMC 400/6.6L engine/motor can fit the G25/G2500 Van, G35/G3500 Van, K25/K2500 Suburban, K15/K1500 Suburban, G15/G1500 Van, Sprint, C25/C2500 Pickup, C35/C3500 Pickup, C15/C1500 Pickup, Jimmy, C25/C2500 Suburban, K25/K2500 Pickup, K35/K3500 Pickup, K15/K1500 Pickup and some other GMC car and/or truck applications - for more details see your automobile manual.

1974 - 1980

1975 GMC 400 Small block, 2-bolt main.
Engine DescriptionSizeVINPrice/Core
1975 GMC 400 Small block, 2-bolt main.

400/6.6LU$1,348/$300
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For troubleshooting tips and repair information on the GMC 400/6.6L engine, please visit our Information page.