fault code po380 info?
 

i have a o4 gmc in my shop and need more insite to diagnose,glow plug/heater problem i mostly work on mid/hd trucks and 5.9 cummins. but do not have a manual for this p/up and need more info to diagnose correctly.any info would be app thank you,72fj

PO380 = Glow plug circuit A.

is this a California truck or a federal truck?

for a California truck P0380 glow plug heater circuit A - Chevy and GMC Duramax Diesel Forum