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How do you reset the ECM on a 1988 C 1500 with a 305?


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Wiki User
2015-07-16 18:23:37
2015-07-16 18:23:37

Only way is to remove the either battery cable for about 10 minutes


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Disconnect the battry for one hour: then reconnect-That should do it.

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You can reset the ecm with a scan tool or by unhooking the battery.

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dont know about the emissions stuff but if your planning to swap engines the ECM will also have to be switched as the 267 ECM will not work on the 305

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Try to find another 97 1500 and swap to see if problem follows the ecm.

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