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2004 Pontiac GTO 5.7L LS1 Engine Motor w/ T56 6-Speed M6 Transmission 159K Miles

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2004 Pontiac GTO 5.7L LS1 Engine Motor w/ T56 6-Speed M6 Transmission 159K Miles For Sale

Used Engine Finder is the greatest spot to discover a high-quality used Pontiac engine for sale. In order to get the greatest bargain on the best substitute motor for your needs, we make it possible for you to reach a community of Pontiac engine importers & salvage yards promptly.

With Used Engine Finder, there’s no need to spend time comparing prices. Merely tell us what you’re looking for and our sellers will respond with numerous quotes. Our direct connection with the vendor makes sure that we can provide you with the best possible prices.


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  • Save time and cash by utilizing Used Engine Finder to discover the best replacement engine.
  • Get several quotes from our reputable sellers.
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Best Engine Replacement Procedure
  1. Swap the engine’s oil, fuel and oil filters, and coolant.
  2. Install new engine and external coolers if existing.
  3. Cleanse the cooling system thoroughly, then replace the water pump.
  4. Renew necessary hoses and belts.
  5. Install a new timing belt, spark plugs, and wires.
  6. Replace essential gaskets and seals, focusing on the oil pan, front, and rear main seals.
  7. Clear the vehicle’s computer codes before engine installation.
  8. Ensure the replacement engine matches the original specifications.
  9. Transfer exhaust manifolds, mounts, distributor, and sensors from the old engine.
  10. Disable fuel and ignition before ignition to prime the oil.
  11. Ensure no plugs or tape remain on the engine before installation.
7 Common Mistakes to AVOID!
  1. Not resetting the vehicle’s computer codes before installation.
  2. Skipping the step of adding engine oil before the first startup.
  3. Forgetting to deactivate the fuel and ignition systems, essential for priming the oil.
  4. Ignoring the replacement of the oil cooler or the radiator’s integrated oil cooler.
  5. Overlooking the cleaning of the radiator and checking the operation of the cooling fans.
  6. Not swapping out the flywheel and its securing bolts.
  7. Trying to initiate the engine’s first run without proper priming.
Warranty Info
Review our Warranty, Return & Exchange policies before ordering. Standard Warranty: 30 days parts replacement. Extended Warranty: Optional 90 days. No labor costs covered. Defective parts may be replaced or refunded. Read more.