Question about GMC Sierra 1500
If the engine still does not run right then clearing the check engine light or MIL (Malfunction Indicator Light) will not change the way that the vehicle will run, and if the vehicle is not running properly then the MIL will just come back on. You can clear any DTC's (Data Trouble Codes) by removing the fuse to the ECM (Engine Control Module) for three minutes, or also by dis-connecting the battery for three minutes, but then the radio and any other KAM's (Keep Alive Memory) will be lost and will have to be reset.
What exactly is the vehicle and engine that you are working on, and what have you done to it so far in the way of tuning it up?
Was the DTC P0300?
Posted on Oct 03, 2010
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Posted on Jan 02, 2017
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