P0380 Code

[TheHoov]

Any help hith this code and how to fix it?

[BigRedChevy]

That is for the glow plug circuit. Sounds like you may have a bad glow plug controller.

[TheHoov]

OK thanks for the fast reply will check it out.

[duramaxdr]

I need to know if your truck has California/clean fleet emissions on it. The glow plug systems work different. If you have California/clean fleet emissions then your truck will have an EGR valve, a belt driven vacuum pump, and several vacuum control solenoids on top of the fuel filter.

If you have California emissions then 1 or more glow plugs are bad. If you have standard emissions then the glow plug controller/relay is bad.

You do not have to be from California to have one of these trucks with clean fleet emissions, I see them here in Georgia a lot.

[TheHoov]

Yes i definatly have a California Emission truck. Thank you for the info.

[duramaxdr]

The glow plug controller rarely goes bad on a Cali emission truck. You probably have a bag glow plug. Take a test light and connect it to the positive side of the battery and touch each glow plug at the tip. The test light will light up on the good ones and will not light up or light dim on the bad ones.

It should also be noted the the 02-04 LB7 with California emissions have an extened warranty on the glow plugs for 10 years or 200,000 miles. If you truck is sill under this then the dealer will fix it for free.

[djp1099]

my vacuum pumpin my 02 GMC Duramax is going bad, as it is making noises. Do you know what the gmc part number is?