What kind of relay is this?

[GM72K10]

Just bought a couple more cucvs. This one in particular from the Pa Dept Forestry. Truck does not cycle when you turn on the key, but actually started after sitting a long time. Can not find a glow plug card. They had an M1009 and a parts truck set up the same way. Thoughts? Thanks

 

[dependable]

That is a later model civilian glow plug control relay chevy used. My 93 G-30 with 6.2 has one like that. They seem pretty reliable.

 

[GM72K10]

Makes sense. Thanks

 

[Chaski]

If you want to clean up the wiring I am pretty sure the matching plug and pigtail for that glow plug controller is a ACDelco PT262