2005 Chevy 3500 wont turn over last week tryed to start wouldn't so i jumped still no go left overnight started up no jump 4 days later no go tried to jump still no go with jumpers on shows 14 vol?

Answer 1

Alot of possibilities here. You left alot of area for mistake for me, but lets hit a few basics anyways.

Testing a batteries voltage while being jumped is very inaccurate and 14 volts is even more so boggling. When running, idealy a vehicle should show 12 volts, when trying to start a battery will typically register on a voltmeter within the vehicle of 13.8 volts.

Why won't your vehicle start. Take your battery out of the truck, charge it for 12 to 24 hours on a 12 volt trickle (2 to 10 amp) charge. Wait 2 days then put it back in truck and try to start it (Or get an amp reading with a multimeter).

If battery is good, time to look at your alternator. Is your alternator charging your battery. This should have been apparent when you finally got it started, but if not, let it run for a little while with lights and blower fan and A/C going. If alternator is bad in a 2005 (this may not work in models from the 70's and before), your truck will die before to long.

If not those two things I believe it is time for you to intrust it within the hands of a qualified GM Technician. You may be getting into something that should be read off of their computers.

BTW, when you remove the battery, you may lose any codes the truck was saving to whisper in your ear at the dealership during the diagnostic.

Good luck to you.

IJDGene Welker,

As in the above answer, it is true that the voltage check is not accurate with a jumper on it or a charger. Check the battery with the ground cable removed. If it reads 13.2 volts, that is exactly what it should read. A good 12 volt battery charges up to 2.2 volts DC per cell. A 12 volt battery has 6 cells. So, 2.2 volts X 6 cells = 13.2 volts dc. Now, if the motor still will not turn over, it sounds like a couple other possibilities. Either the solenoid is bad in the starter or the engine is locked up. Make sure the ignition is off. Grab hold of the surpentine belt & put some tension on it while pulling on the belt. If the engine is not locked up, you should be able to move the crank shaft by doing this. If you may think this is it, then pull the plug wires and label the cables for what plugs they go on. Then remove all 8 spark plugs. With the plugs removed, you have removed all compression between the top of the pistons and the bottom of the heads and valves. Now try to turn the engine by hand. The engine should turn over relatively easy. If it don't, then you have some major damage in the engine. If it turns over, then that much is OK. Put the plugs back in & put the plug wires back on. Next check out the battery connections & make sure the cable connections are clean and tight. If the starter klicks while turning the ignition to start, but the engine don't turn over, then I'd check out the starter or the wire connetions at the starter itself.

Good luck!!!