Hello I have a 2003 Z71 4x4 with a flashing examine engine light. It just started once I was turning off a side street and increasing to 55 mph. It then went off once I slowed down and also stayed off. Then again yesterday It come on again once I was accelerating and then stayed on. Ns recently had the Trans, front and rear Diff, and the transfer situation fluids adjusted along with an altering the fuel filter. I have also adjusted the break pads and also the rear rotors. If anyone might be of assistance I would appreciate it.

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Go to local auto zone and have password read.... Because that free...or go to dealer and have castle look because that codes...without code no much can be done....Good Luck and welcome come the club
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I have actually a code reader coming tomorrow yet that go me no an excellent right now. I saw leave work but my truck was shaking so I just shut that off and called because that a ride. I have actually a Mechanic that works through me yet he mainly operated of Ford. He said it sounded favor an O2 sensor. Any kind of ideas there is no the code.
I have actually a password reader comes tomorrow yet that walk me no an excellent right now. I went to leave work however my truck to be shaking so I just shut that off and also called for a ride. I have actually a Mechanic the works through me yet he mainly operated of Ford. He claimed it sounded favor an O2 sensor. Any type of ideas without the code.

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There are hundreds of codes possible, and those command to numerous possibilities. We have a far better chance that disproving Einstein than this wild assumption: v
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Avoid control the van if the light is flashing. The flashing suggests that the breakdown can destroy an additional system or part. This can be a problem where miscellaneous such together a well-off fuel mixture or poor misfire might damage the cat or the like such as in this GM text:"The complying with is a perform of the modes of operation for the MIL: (Malfunction Indicator Light) * The MIL illuminates as soon as the ignition is turn ON, with the engine OFF. This is a bulb test to ensure the MIL is able come illuminate. * The MIL transforms OFF ~ the engine is started if a diagnostic fault is no present. * The MIL stays illuminated after ~ the engine is began if the regulate module detects a fault. A diagnostic trouble code (DTC) is stored any kind of time the regulate module illuminates the MIL because of an emissions associated fault. The MIL transforms OFF after three consecutive ignition cycles in i beg your pardon a check Passed has actually been reported because that the diagnostic test the originally led to the MIL to illuminate. * The MIL flashes if the regulate module detects a misfire problem which might damage the catalytic converter.
* when the MIL is illuminated and the engine stalls, the MIL will continue to be illuminated as long as the ignition is ON. * as soon as the MIL is no illuminated and the engine stalls, the MIL will not illuminate till the ignition is cycled OFF and also then ON."------Misfire codes space P0300"s IE: P0304 is cyl #4, P0300 is an erratic misfire (any/all).Don"t preeminence out bad fuel.------Yes, this is simply the very same as in a Ford together GM; he"s quite most likely correct. Yet instead that speculating, avoid driving it till it"s checked and also known. Great luck!