When to replace the glow plug in a Duramax?
When to replace the glow plug in a Duramax? With the igniting OFF and the affected glow plug disconnected, measure the resistance between the affected glow plug terminal of the glow plug and ground with a DMM for less than 1 ohm. If the resistance is more than 1 ohm, replace the affected glow plug. What is the number on the glow plug? The 126* number is the newer 9G plug; a 97364968 is the older 61g plug. Use whichever plug you like. Turns out when all is said and done it was a bad glow plug. What happens when...