Starter solenoid clicks and truck won't turn over

[cam.man67]

Yesterday my GMC was running fine. I go to start it this morning, and the starter solenoid by the fuse box just clicks. I have 12v at the purple wire...is this indicative of a bad solenoid?

[abig84]

probably... could also be a bad 12v going to the starter on the big red wire or a bad ground on the engine block but 95% of the time its just the starter solenoid.

one way you can check is have someone try to start it and crawl under there with a small hammer and tap on the starter and see if it starts. used to do that all the time when cars got towed in for a no start situation... same technique goes for a non working fuel pump.

[Tom]

Jump it. If it starts its the battery. If not its the starter. If you only have 12v I'd say the batt is dead. Should be at least 12.5

[Kudzupatch]

Could be the connection too, I had one that had a bad connection at the starter. Assumed it was a solenoid too.

[cam.man67]

Ok, so here's the next question: does anybody have the part number for the starter solenoid up by the fuse block? Only ones I can find are the starter-mounted solenoid.

[95 S_Trucker]

Originally Posted by cam.man67

Ok, so here's the next question: does anybody have the part number for the starter solenoid up by the fuse block? Only ones I can find are the starter-mounted solenoid.

What year truck do you have? There isn't a solenoid anywhere else, just on the starter. There is a relay in the fuse block on 96+ trucks. There is a relay behind the plastic cover on the firewall on the 88-95 trucks.

[Tom]

Originally Posted by 95 S_Trucker

What year truck do you have? There isn't a solenoid anywhere else, just on the starter. There is a relay in the fuse block on 96+ trucks. There is a relay behind the plastic cover on the firewall on the 88-95 trucks.

This. Its not a ford.