Intermittent starting issue 2011 Yukon XL Denali

[Dadnali68]

Hi all, just got the truck a few days ago. Previous owner said it was great but had some issues but he thought he had fixed it. He was wrong. No lights on the dash, turn key, no click no start. Sometimes it's a few minutes of turning the key until it starts, sometimes it starts right away. Sometimes remote start works, sometimes it doesn't. Last owner replaced battery, starter, transmission, and fuse block. I know I need to look at the wiring near the battery for corrosion. And next time is doesn't start I need to probe the starter to see if it's getting proper voltage. I'm going to redo the ground in the engine compartment soon as well. Any other ideas would be great. I also have an idea for a work around I'd like to toss out there. I used to crew for a drag car. We had a second starter switch on the firewall so we could bump the motor to check valve lash. Would I be insane to just say F-it and wire in a second starter on the firewall to bypass whatever the issue is and just use it when the truck refuses to start? Would love to know your thoughts. I really like this truck and I want it work for me. I got it for a great price and it's still really clean for the age and milage. I want to do right by it so it will do right by me and my newly expanded family.

 

[Fless]

Welcome to the forum from Colorado!

I would lean toward deeper diagnostics before wiring any workaround. The cause of the current (pun intended) symptoms could cause other issues down the road.

 

[Dadnali68]

Welcome to the forum from Colorado!

I would lean toward deeper diagnostics before wiring any workaround. The cause of the current (pun intended) symptoms could cause other issues down the road.

Thank you for the warm welcome from a cold place! Yeah I'd like to do it right. But if this thing ever leaves me stranded the gloves are coming off!

 

[j91z28d1]

if you've got one with weird issues and you want to try and track them down yourself, a 300$ clone tech 2 and a subscription to all data or something would be a good place to start.


for the no start, if it was mine I'd look at a scanner and see if the crank request is getting to the bcm and go from there. it could be anything from a bad security thing, immobilizer I think they call it it? to ignition switch.

short of that, battery cables looking good on the outside and being bad internally is pretty common around there, as well as look battery terminals. make sure he's replaced both recently and that you can't move the battery terminals by hand trying pretty hard. sounds silly but it happens.

 

[Dadnali68]

if you've got one with weird issues and you want to try and track them down yourself, a 300$ clone tech 2 and a subscription to all data or something would be a good place to start.


for the no start, if it was mine I'd look at a scanner and see if the crank request is getting to the bcm and go from there. it could be anything from a bad security thing, immobilizer I think they call it it? to ignition switch.

short of that, battery cables looking good on the outside and being bad internally is pretty common around there, as well as look battery terminals. make sure he's replaced both recently and that you can't move the battery terminals by hand trying pretty hard. sounds silly but it happens.

Thanks for this. Currently riding around with a simple scanner and a multi-meter. So far since I made this post it hasn't had the problem, but I will update as I figure things out!

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

I had similar intermittent starting issues with my 97 Yukon (RIP), and it turned out to be a worn out ignition switch.

 

[Dadnali68]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

I had similar intermittent starting issues with my 97 Yukon (RIP), and it turned out to be a worn out ignition switch.

Thank you for the welcome, the advice on here has been great! I will update this thread as I find things out and will participate where I can in other conversations. Just know I'll be a slow poster, I work from home so I don't drive it very often and it just recently turned cold so I'm not being very proactive on diagnostics in my free time. Also, 8 week old baby. I like him a lot more than the truck so I spend time with him lol.