does any one know how to check engine codes for 04 chevy pickup I thought someone said that you can turn the key on 3 times and the code would display in the odometer display engin code light is flashing after the bitter cold day on friday I’m hoping it’s just a fuel issue I put in some seafoam to see if that will take care of it any other ideas be appreciated thanks
Well you can usually rent or borrow a code reader from a auto part store, I borrowed one the other day to look for a code, in their parking lot, didn’t cost me a penny. Of course if you can’t get to their parking lot, that may not help you.
Other than that can’t help ya 
More than likely it is one of your 02 sensors. Just had one replaced on thursday. same deal light come on stayed on and blinked every now and then, idled rough spit carbon out the exhaust. I tried injector cleaner first but as usual it wasnt a quick fix.
When was the last time you changed your vehicles FUEL FILTER ?? Had a 96′ chevy Suburban that (service engine soon) light would illuminate on dash, changed fuel filter yearly haven’t had any problems since. If your fuel flow is restricted it will signal the vehicles computer system. “hairjig” 
Could be an oxygen sensor. A quick “fix” is to take the vehicle out for a run to blow the carbon out of it – as in stomp the gas and let ‘er rip! Especially in this cold weather, be sure you warm the engine up before trying this.
If it is an oxygen sensor, doing this may clear it for a while, but the warning light will come back in a few months.
Good luck, and don’t get a speeding ticket. 
Dan
A blinking dummy light is not good, usually means something needs attention asap. As mentioned, most auto parts stores will read codes for free, they want to sell you parts which is ok. O2’s usually give you a steady light, I’d get the codes read soon.
thanks for the advice still no change after taking it fishing today off to the shop monday the fishing was slow also did get some nice slabs though.
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A blinking dummy light is not good, usually means something needs attention asap. As mentioned, most auto parts stores will read codes for free, they want to sell you parts which is ok. O2’s usually give you a steady light, I’d get the codes read soon.
Good advice 
A lamp on constantly, is basically FYI. A blinking light means, something is happening and it’s not too good to keep using me.
big G 
Chevey/GMC Check Engine lights are all tied into the emision controls and fuel flow. Is this a gasoline or Diesel engine?
Last Wednesday night I had the same thing happen driving home from work with my diesel. Was a combination of fuel filter was expired, air filter was getting dirty. Neither was totally the problem, but with -15 degrees, engine running much colder than normal and fuel & air problem…gave me greif!
Sounds really stupid. but try taking off your gas cap and reseating and tighen it again. sometimes that is all it takes. that is the first thing my mechanic says when I call with a sensor issue. and actually worked a few times for some reason. might as well try as won’t cost you anything. and he says that is the one of the first thing mechanics do.
Broncs
Correct me if Im wrong but Check Engine Light wont go away on Its own you have to reset it your self. On my alero I replace fuel regulator and then disconnected battery for a couple minutes. Check Engine light came on a week later and I just reset it again and havent seen it for 6 months.
Not exactly sure on Chevy, but I believe all are basically the same. What Broncos guy is talking about is, a fuel evap leak code. Your fuel system “tests” itself for leaks periodically. If you fuel your vehicle with the engine running and it happens to run a leak detection test while doing it, it will turn on the check engine light. It will not however “blink” at you for this. Also a plain old loose gas cap, which is loose when the test is run, will turn it on. Thats where a tech tells you to remove the cap and reinstall, listen for the “click” twice, it is like a torque wrench, when its tight it will click and bypass. After I belive 6 “passed” leak tests, the light will turn off, but it will have stored the code for a fuel evap leak in the module affected.
big G
yep. and I have never heard of the “check engine” light blinking. did you have a recent oil change? if so when they reset that it blinks 3 times. maybe they did not reset it right? and that would be turning the key on , not the engine over, and within 5 seconds pump the breaks 3 times and that resets that one.
Broncs
blinking cel are usualy a very bad thing,I had a car once that blinked a cel, it ended needing a new engine…. In that case it was indicating a misfire.
They will blink, and as Nick said, very catastrophic to keep driving. Todays vehicles are pretty smart. Transmissions wil go into Limp mode (won’t shift above 2nd gear) to protect themselves if something is not right. Check engine lights will flash. When we get a customer calling with a “flashing” check engine light, we advise them to tow it in… it’s not worth possibly having to buy a new engine.
big G
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Correct me if Im wrong but Check Engine Light wont go away on Its own you have to reset it your self.
If it’s a soft code the light will turn off after so many key cycles and it won’t be retrievable for a scan tool to get the DTC that was set.
Hard codes the light will remain on and a reset of some sort with a Scan tool or battery disconnection will be needed to clear the Trouble code and light.
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yep. and I have never heard of the “check engine” light blinking. did you have a recent oil change? if so when they reset that it blinks 3 times. maybe they did not reset it right? and that would be turning the key on , not the engine over, and within 5 seconds pump the breaks 3 times and that resets that one.
Broncs
On my 01 Tahoe you have to pump the gas pedal 3 times to reset oil change light.
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