99 ecm in a 98 - Third Generation Forum

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99 ecm in a 98
Tuesday, March 24, 2015 8:17 AM
I'm having some fan issues on my new to me 98 cavalier 2.2 ohv. I stumbled across a 99 cavalier with a 2.2 ohv automatic just like mine and picked up the ecm for 20 dollars. Since they have the same engine and transmission can I get away with plugging the 99 computer in without taking it to gm to have the vin and mileage flashed?
Thanks
Tim

Re: 99 ecm in a 98
Tuesday, March 24, 2015 9:35 AM
I believe your 98 mileage is stored in the cluster.

You can swap ecu, but will require a they lock relearn.



FU Tuning



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