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12491857 - Remanufactured GM 2001 - 2007 6.0L, 366 CID, 8 Cylinder Engine - Replaced By 19301550

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Item has been discontinued and is no longer available
Shipping: FREE 48 State Shipping


Consists of engine block, crankshaft, connecting rods, pistons, piston rings, cylinder head assemblies (including valve train components), lifters, camshaft, timing gears and chain, timing chain dampener, front cover, rear cover, oil pump, oil pan and valve covers, unless otherwise specified.

RPO - LQ4 w/KL5
2001 - 2007 Chevrolet Pickup (CK1,2,3)
2001 - 2007 GMC Pickup (CK1,2,3)
2001 - 2007 GMC Suburban (CK1,2,3)
2003 - 2006 Chevrolet Van (G2,3)
2003 - 2006 GMC Van (G2,3)

Notes: Cast iron cylinder heads. This engine can be used for both LPG/CNG. Manual transmission applications will require procurement of new clutch pilot bearing. If used on G-Van or any 2007 applications, transfer the oil pan or procure a new oil pan and gasket from GM parts.

Application List



  • 12491857
  • 12491857
  • GM (General Motors)
  • Item has been discontinued and is no longer available
  • New


Shipping Information

  • Item Requires Shipping
  • 500.0 lbs.
  • W33.5000” x H36.5000” x L39.5000”
  • FREE 48 State Shipping

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