It just wouldnt start SMH!!!!

I had a similar problem. The new replacement starter (Original PN Superseded) supposedly a bad solenoid. The second same deal.

I told the mechanic let me see that starter. Used a pin to take some very rough measurements. And realized while both were gear reduction starters the new one had mirror image offset. IE it went in upside down compared to the original. Flipped it over and bolted it to the block. Some of the Cables where a stretch and had to cut some cable ties and add some new ties and conduit to avoid chaffing but it worked.

Now why didnt the mechanic check that?

 

My concern is that he mechanic may have not found anything wrong with last starter, so rather than replace he may have painted it and put the old one back into your truck and charged you for a new starter.

 

FYI Truck starters don't ground through the mount like cars. The larger starters have a ground stud and the ground cable(s) from the batteries are hooked directly to the starter.

 

Thankyou for the info. I did not know this. Wonder if last mechanic bothered to check the ground?

 

I assume the engine is a DT466 and starter is a 12volt Delco 40MT or 42MT.
Battery positive on large stud on top of the solenoid.
Battery negative on the large stud on the rear of the starter. Also earth wire from here to a small stud on the solenoid.
Starter energising wire on another small stud on the solenoid. This wire goes to a starter slave relay, usually nearby on the chassis or firewall etc. This relay has a positive cable on its other stud. The start button operates this relay which closes its contacts and powers up the energising wire to the main starter solenoid. The starter will then crank the engine.

To test the system connect a voltmeter to the main positive and negative studs on the starter. Voltmeter should read at least 12volts.
Press the start button and see if the voltage drops. If the starter doesn't work, but the voltage drops substantially you have problems in the main battery cables or batteries.
If the voltage doesn't drop by much, move the positive voltmeter lead to the solenoid energising wire.
Press the start button again.
If the voltmeter reads about 12volts with the start button pressed, the starter is faulty.
If the voltmeter doesn't show any voltage it means that the relay is not working. This could be a faulty relay or wiring to it from the start button.