2010 Yukon 6.2L DIY DOD Delete / Engine Rebuild - Starter issue - RESOLVED

[jjmasterson]

I'd pull the plugs and turn the motor over by hand and see if you feel t binding up.

Pulled plugs and turns over by hand easily. Even turned the key and starter cranks engine normally. (Without plugs)

 

[jjmasterson]

If there's a mechanical problem causing the binding?
drain and look at the oil
remove and cut open the oil filter
there will be a lot of metal.

When I pull the plugs, the crank turns by hand just fine. Compression issue?

 

[j91z28d1]

how old is the starter? if you're a 100% sure the cables are new, tight and ground is solid. I've seen starters get weak but not completely fail. I believe there's 2 different power ratings for starters gm used for these trucks too.

 

[jjmasterson]

how old is the starter? if you're a 100% sure the cables are new, tight and ground is solid. I've seen starters get weak but not completely fail. I believe there's 2 different power ratings for starters gm used for these trucks too.

The starter is new. Going to swap it out for the old one (which probably worked fine. I bench tested it and it fired up)

 

[j91z28d1]

The starter is new. Going to swap it out for the old one (which probably worked fine. I bench tested it and it fired up)

worth a shot, but if it's still weak too, you either have a weak battery or bad cables/connections.

bad cables that look perfect are the 2nd most common thread around here just after low oil pressure.

hooking battery cables from one battery to another unless it's from a running car doesn't always work right. I've done that myself and confused me when it didn't help. battery cables, especially today's thin ones are better at charging the dead cars battery up from the the running car than actually powering the starter. best to physically swap batteries from a known good car if you think a weak battery is possible.

 

[Fless]

If the starter swap doesn't fix it, verify the voltage at the starter while it's cranking. Low voltage there can indicate a bad battery cable, ground, or a bad battery.

 

[jjmasterson]

If the starter swap doesn't fix it, verify the voltage at the starter while it's cranking. Low voltage there can indicate a bad battery cable, ground, or a bad battery.

Just load tested battery. Came back good and fully charged. Checking cables. If I bypass the starter cable from the battery and use a jumper cable directly from pos battery to starter, will that simulate good cable connection?