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replacing chevy cobalt engine

A few months ago I acquired an’07 Cobalt (vin 1G1AK55F277107005) which had a cracked engine which resulted in the wiring harness being damaged. The car still ran, however. I have been having trouble getting a used replacement engine with the correct wiring harness - after two unsuccessful attempts. The wiring apparently is not interchangeable from one model to another.

What are my options? Can I find out what other models (vin nos.) have the same wiring harness? I haven’t been to find anyone to offer any solutions.



  • Get a replacement engine, and swap the original wiring harness to the new engine, fixing the damage as you go. (I'm assuming this is a repair-only swap and not a "as long as I'm repairing it I may as well make it faster" swap)

    Two reasons you always want to do this if you can: First, it eliminates a lot of guesswork if the new engine won't fire - you KNOW the harness is good because it was just working 5 hours ago when you drove the car into the garage. Second, it keeps the connectors the same between the engine and the rest of the car - sometimes manufacturers will go with a different connector in different years, which means the new harness might not mate up to your old car. Swapping harnesses eliminates this.
  • shadowfax,

    thanks much. even though the original harness is damaged I can give it a try and if it works, buy a replacement.

  • The Cobalt had three possible engines, a 2.2 litre, a 2.4 litre, and 2.0 litre turbo. Are you sure that the used engine and harness is an exact match for the one in the car?
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