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Access GMC  wiring diagrams and repair procedures. Learn how to repair, install or remove a part, reset engine lights...
GMC 402 Engine (V8, 402 cid, 6.6L)
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This GMC 402/6.6L engine/motor can fit the K15/K1500 Suburban, Sprint, C25/C2500 Pickup, C35/C3500 Pickup, C15/C1500 Pickup, C25/C2500 Suburban, C15/C1500 Suburban, K35/K3500 Pickup and some other GMC car and/or truck applications - for more details see your automobile manual.


1975 GMC 402 Small block, 2-bolt main.
Engine DescriptionSizeVINPrice/Core
1975 GMC 402 Small block, 2-bolt main.

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1970 - 1974

1970 GMC 402 Fits most applications. big block.
Engine DescriptionSizeVINPrice/Core
1970 GMC 402 Fits most applications. big block.

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For troubleshooting tips and repair information on the GMC 402/6.6L engine, please visit our Information page.