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Q: where is the ECM location on 1990 GMC Safari

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
service engine code reset
on OBD1 systems. the code will re set by itself only after the problem is resolved. get the code pulled and get the diag to find the failure and repair accordingly.

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