Need guidance on installing the brain box (as the auto salvage yard calls it) in my daughter's '99 Chevy Cavalier.

. Disconnect negative battery cable, recording any radio codes first.

. Remove major electrical connector from ECM. There may be a connector bolt securing it. Take a small screwdriver and gently pry the connector off the ECM.

. Remove both nuts from the ECM mounting studs.

. Remove old ECM and install new.

. Spray female connectors with WD-40 and button things up.

Wear rubber sole shoes and ground yourself before touching the new ECM. Static electricity can easily damage an ECM.