The best way to see if your battery is good is to check the voltage while the engine is off. It should be around 12.5 to 14 volts. If the voltage falls below this you probably have a bad cell in your battery.
In a vehicle voltage is relative to amperage, and is mearsured as such -- volt/amps. Your gauge may say amps but it is realy volt/amps. Anyway, 13 amps sounds normal.
Check your battery connections and make sure that they are tight and free of any corrosion -- especialy between the contact surface of the connection.
Your check engine light probably has the code that will lead you to your stalling problem. Take your suburban to Autozone or a place like that and ask them to scan your computer. They will do this for free and they will give you the trouble codes that are associated with the check engine light. Write them down or ask to have them printed out and let me know what these codes are. They will be a bunch of numbers like P0302, P0351, ETC. They will also test your battery. The best thing is that they will do all this for FREE.
A corroded battery connection will cause your problem but there are a million other things that will also cause it, so have the check engine light scanned.
Saturday, October 25th, 2008 AT 12:47 PM