99 Yukon Starter/Relay issues

[Shibbershabber]

1999 Yukon 5.7 4wd... 180k

Had a no start last week, poked around and ended up swapping the starter and AC relays...

it started.

I figured that I had a bad relay. So I ordered a couple new ones.


Today I had the same no start, nothing but a single click...

Put in one of the new relays and nothing... put in the other spare, still nothing.


Could I be looking at a starter at this point?

40 & 50 amp fuses are good, new battery, good voltage...


These dont have a separate starter solenoid do they?
Is it possible to short it somehow to get it started in a pinch? Between this and my differential, I am running out of free tows.

 

[OR VietVet]

If in fact the battery is new, you did not say how old and the quality, it does sound like a starter but I would also check all electrical connections from battery to starter. It does have a solenoid on top that can be jumped across. Still may not start though. Also, if you do change the starter make sure you look to see if there is a shim in there where it bolts up at.

 

[Shibbershabber]

The battery is by Interstate. Replaced in Summer 2018.

Alternator is also new as is the Negative cable.

As soon as the tow drops it in my driveway, Ill have a look at the positive cables too.

 

[Big Mama]

An old mechanic told me to find electrical problems use a $2 test light. Start with the battery, then the solenoid, then the starter. This eliminates switches, cables, and relays.