Went out to start the 06 last night after getting back in town with the 13. Truck had only sat for 3 days since last drive. No previous issues.
Doors unlocked with the fob, interior lights came on, turned the key, barely cranked, clicked, tried to wind down to nothing, clicked then started to crank and fired up. Voltmeter read 14. Let it run, then let it sit for 2 hours.
Same scenario. Took the battery to O'Reily's late last night to charge and test. Report is 1/4 life left. Interstate battery is at its 5 year mark currently and never given me trouble.
I ordered a battery on Cyber Monday just in case since it was $40 off, but a similar situation with a friends Yukon led him down this path. He replaced the battery, the alternator and finally found that it was likely the starter in the first place even after he switched stuff out.
I thought about trying the Suburbans new battery (different size and top mount as compared to the Tahoe side mount and tight spot next to the fuse box) just to see if that might give me another look before I buy that new battery or go down the new starter route.
Thoughts and input welcomed. Thx.