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2000 Silverado died on the road....

cliff&kim's Avatar

Join Date: Dec 2001
Posts: 53

02-13-05, 05:45 AM   #1  
2000 Silverado died on the road....

at 4:30 this morning! This happened about 3 years ago and I think it was the ignition coil(then under warranty). It's a 4.3 V6 half ton short bed. Automatic trans. It acted like I just turned the key off. It cranks fine,but that's all it does. No dim lights or anything. If it is the coil,is this something a non-mechanic can replace? Thank you.

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the_tow_guy's Avatar
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Join Date: Feb 2001
Posts: 11,477

02-13-05, 06:30 AM   #2  
Ignition coil is basic stuff. Normally a couple of bolts, a couple of electrical connectors, and the coil wire to the distributor. To locate the coil find the center wire on the distributor cap. The other end will be at the coil (unless your vehicle has the type system where the coil pack is mounted on/in the distributor cap). Before you go for the coil, you might pop off the distributor cap and replace the rotor. Fairly common for the rotor to eventually have a burn through and when it happens it's usually with little warning and would give you the same symptoms.
You can also check to see if you are on the right track by removing one plug wire to see if you're getting any spark. Insert a screwdriver or other metallic object into the plug boot and hold near a good ground (engine block or accessory bolts). Make sure you are insulated from the plug wire and screwdriver to avoid eing shocked. Have an assistant crank the engine and watch for spark. Should be nice crisp snap and a blue arc to ground. A failing/failed coil will sometimes give spark but it will be weak and yellow. If you get no spark from the plug wire you can next check for coil output. Do the same as with the plug wire only this time pull loose the wire running from the coil to the distributor at the distributor end and hold near ground and crank. If you got no spark at the plug wire but you DO get spark from the coil wire, likely bad rotor (or ditributor cap). Could also have a bad ignition module, but it will be the most expensive of the components.
Post back what you find.

Measure it with a micrometer; cut it with an ax.

Last edited by the_tow_guy; 02-13-05 at 06:41 AM.
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