Whats This Electrical Contraption?

[Rob73-87]

Originally Posted by lurch115

if the truck was converted from a diesel to a gas that relay and such would have stayed with the diesel since the diesels don't use a distributor, and they also have different valve covers.... that and the glow plug controller is larger than that relay...

Believe me - GM won`t mount a relay to a valve cover !!!!??? As I said, I have the same relay too, and my truck came with a TH700 - so it can`t be the kickdown-switch....

Any idea ?