09 Sierra 12v Battery Unhooked for 8 Months- Hybrid Battery Ok? - GreenHybrid - Hybrid Cars

09 Sierra 12v Battery Unhooked for 8 Months- Hybrid Battery Ok?

Reply

 
 
 
  #1  
Old 05-04-2018, 09:25 AM
Enthusiast
Thread Starter
Join Date: May 2018
Posts: 1
Default 09 Sierra 12v Battery Unhooked for 8 Months- Hybrid Battery Ok?

Hi Everyone,

I have an 09 Sierra 4X4 6.0 Hybrid that finally experienced the dreaded AFM lifter failure at 212K miles. I have had the truck down while rebuilding the engine on the side. The rebuild consisted of cylinder honing, having the heads done, replaced cam, cam bearings, all lifters, lifter trays, VLOM, oil pump, and crank shaft center line checked. Basically a brand new engine. I am finally getting to the point where the truck is ready to fire back up. My concern is that while I have been working on the engine, I have had the 12v battery unhooked. Is this going to cause a problem with my Hybrid battery? Ultimately resulting in the truck not to start when I turn it over soon?

Note: I have had the 12v hooked back up for 3 days on a trickle charge to ensure it is good to go when the time comes.

Any advice or direction to beneficial information would be greatly appreciated.
 
Reply With Quote
  #2  
Old 05-04-2018, 12:08 PM
Ridiculously Active Enthusiast
Join Date: Sep 2014
Location: Mesa, AZ
Posts: 2,635
Default Re: 09 Sierra 12v Battery Unhooked for 8 Months- Hybrid Battery Ok?

Highly likely that it's toast. Aged and high-mileage HV batteries tend to drop multiple cells and are ruined.

Personally, I recommend you remove the battery and check all 40 module voltages before attempting to start.
 
Reply With Quote
 
 
 
Related Topics
Thread
Topic Starter
Forum
Replies
Last Post
NorBurn
HCH II-Specific Discussions
1
06-22-2014 06:48 PM
MMH06
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
5
02-19-2010 07:08 AM
Droid13
Toyota Camry Hybrid
25
04-21-2008 05:07 PM
Jason
Hybrid & Related News
2
09-16-2004 02:04 PM
Jason
Hybrid & Related News
0
07-05-2004 02:47 PM


Thread Tools
Search this Thread
Quick Reply: 09 Sierra 12v Battery Unhooked for 8 Months- Hybrid Battery Ok?


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.