Question about Chevrolet Silverado 2500HD

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2003 chevy silverado 4.3. check engine light and now battery light is on. engine turns over but no fire. i checked feul pressure and coil both tested good. bought an innova diagnostic tester but no luck.

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  • 89 Answers

Bad alternator or battey

Posted on Oct 12, 2013

  • John Ryland
    John Ryland Oct 13, 2013

    I ended up replacing the distributor cap and rotor along with the sparkplugs and all the wires. Apparently the an AC hose runs over the top of the distributor cap and can drip condensation causing corrosion. i went ahead a put grease on all the points so hopefully this doesn\'t happen again. also the hex head screws that came with the new cap were garbage, I would suggest using the one that you pull out of the original cap. I dont know why the battery light came on, but now that the truck is running great the light is now off. hopefully this helps anyone else with this problem. Oh and I also bought one of those Innova diagnostic tools and was of now use to me, it gave me no reading maybe because the problem was caused by ..

  • John Ryland
    John Ryland Oct 13, 2013

    corrosion*

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Posted on Jan 02, 2017

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SOURCE: Chevy truck running rough 150,000 miles

Find out why the engine light is coming on, it is the info u probably need to fix the running rough problem. Most auto parts stores will read the codes stored in your trucks computer for free, write them down, and ask what they mean and how to correct the problem. If u need more info, return to this site w/ codes for further help.

Posted on Dec 30, 2008

  • 1 Answer

SOURCE: 2003 Silverado rough idle, idles good after "check engine" light

Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.

Posted on Feb 07, 2009

  • 139 Answers

SOURCE: check engine light on, ignition coil diagnostic

i would start with the gas cap and have them read the
code again. its a cheaper way to go first

Posted on Apr 10, 2009

  • 7353 Answers

SOURCE: po452 trouble code changed sensor engine light

you may have to drive it several days for the light to go off, or have the codes cleared. personally I would just drive it. if the computer tests it, and it passes the test, it will go off on its own.

Posted on Sep 21, 2009

  • 1 Answer

SOURCE: 2003 chevy silverado 1500 check engine light on

2003 chevy silverado
A picture of a engine is on the dashbroad, what can I do to get it off.
Rita

Posted on Oct 07, 2009

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1 Answer

99 silverado 1500 4.3 engine won't start


check high tention coil wire, coil wire going to dist cap with test light, if test light light up, it good also check dist rotor, and if that good might be pick up coil , the module might be bad, let me know what happen Bob

Dec 25, 2012 | 2005 Chevrolet Silverado

1 Answer

I have a 1993 Chevy 1500 Silverado 5.7 worked. I changed the feul pump and feul filter. When you turn the ignition to the on position you do not hear the feul pump engage and there is no feul pressure at...


Yes, it can be the relay. What I do is unplug the relay and swap it gor yhe horn relay. If this doesn't work, I use a volt/ohmmeter to probe the relay socket. Doing this, I can usually find the problem. With the key on , there should be two terminals in the socket that have battery voltage and one that is grounded. The last terminal goes to the pump and should show low ohms to ground. In your truck, the relay coil is connected to ground and turned on by the ecm with a positive signal. It also seems to depend on the oil pressure switch, so you might want to temporarily bypass the switch with a paper clip in the connector to see if that is keeeping the pump from running.


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Aug 10, 2017 | 1993 Chevrolet K1500

1 Answer

I have a 2001 chevy silverado 1500 with a 4800 vortec engine. it starts and idels fine but when ever i give it gas, the engine starts to sputter and dies. ive already changed the fuel filter and spark plug...


This sounds llike weak feul pressure, the fuelpump may need replacing, the first thing to do is have the fuel pressure tested and if the pressure is low then have the pump replaced. the pump is located inside the fuel tank and the tank will need to be dropped to replace the pump, good luck ,

Jan 01, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

2003 Chevy silverado wont start. it has gas, we


Its possible the security system has been set off. The security light on the dash will stay on if this is the case. The cause can be the key tumbler if it is the security.

Jan 20, 2010 | 2003 Chevrolet Silverado 1500

2 Answers

To clarify my problem.... My 99 Chevy Silverado ran out of gas one day. As you know when this happens it sometimes toast the fuel pump... So i did have to replace the feul pump. It was a junkyard fuel pump...


It sounds like the fuel pressure check valve on the fuel pump has gone bad and your losing fuel pressure when engine is turned off. Try priming the fuel pressure twice, that's when you turn the ignition keys to the run position with out starting the engine for 10 seconds and then turning the key's to the off position and on again for 5 seconds. After the second prim the engine should start, to check this you can lone out a fuel pressure gauge and check the fuel pressure at the shredder valve. You should have 62 to 65 PSI during prim and once the engine is running, it should drop by 5 psi. As for your the accuracy on reading the right amount of fuel in your gas tank, the sensor is apart of the fuel pump sending unit and the float may have gotten bent and nothing you can do to fix it unless you take the fuel pump out again and replace the sending unit. Good luck and keep me posted.

Nov 30, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Hello on a 2003 chevy silverado pick up truck 4x4


A bad ground or wire somewhere is pulling current from your battery when it's not running. Use a test light, try to find a circuit that is hot when it shouldn't be. It will take some time and patience.

Oct 25, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

Slow start after warm up.


perform a fuel pressure test at the fuel pressure port.
if is low pressure remove the fuel tank and check return pressure line clips conections

Jun 15, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Engine shakes periodically; warm or cold. Bad Coil?


the p 0300 codes gives you the clue
it is random misfires and that is predominately from injector and low fuel pressure
pulling a plug lead will amke no difference if there is no fuel in that cylinder to ignite
bad coils will be a constant miss regardless
try putting a can of quality injector cleaner in the tank to see if that fixes the problem
have a fuel pressure tset done to check for pump, filter or pressure regulator problems

May 18, 2017 | 2003 Chevrolet Silverado 1500

3 Answers

Hard to start chevy 350 vortec


You will need to do a fuel pump pressure leak-down test, the pump must not loose more than 5 PSI overnight, u will need a cheap fuel pressure test guage, the test port is on the fuel supply rail to the injectors on the intake manifold, it looks like a tire valve but metal with a plastic cap on it, u may be able to borrow this guage from Kragen, Autozone or a parts store like them, if not they are very cheap, less than $20 US. Run the engine with the test guage hooked up, turn off the engine and then check it in an hour or so, if it drops more than 5 PSI then u will need to replace the fuel pump in the gas tank. One note make sure the connection for the guage is tight with no leakage or the test is invalid

Jan 15, 2009 | 1999 Chevrolet Silverado 1500

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