1997 Chevy Silverado problem
hi, ok I'm sure you tried alot of solutions, I think the ECU has governed the engine must have sensed a previous problem or its just a malfunction from a sensor, important sensor to check is the 'engine knock sensor' try disconnecting and reconnecting it or test with multimeter and compare all readings with a new engine knock sensor or disconnect and reconnect battery, the other way might be to reset the engine managment system, this however I dont know but your dealer can do this for you.
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