NP.... You're Quite Welcome, Brother... When you have a few spare minutes… Please visit this link taken from
@Mooseman ‘s Signature line and Download a GM OEM Digital Service Manual as what follows comes right from that source ...mentioned at the courtesy
@JerryIrons when he was over at TV:
********* Please note that the FireFox browser has issues with the password handling and that these downloads are not under HTTPS, flagging them as security risks. Chrome and Edge work fine once you allow the download. ********* ATSG 4L60E Manual 4L60E Rebuild Manual 2005 GMC Envoy XUV...
gmtnation.com
“This is right out of my service manual. It is based on battery reserve capacity, divided by
4. (or, amp hour rating divided by 2.4):
"The parasitic current drain should not exceed this number. Example: If a battery has a reserve capacity of 100 minutes (60A/H), the current drain should not exceed 25 mA."
Excerpt from:
forums.trailvoy.com
The PCM and BCM maintain a need for Battery Power beyond the moment of “Key-Off” for around 15 Minutes… so ALL Parasitic Drain Down Testing should proceed after that. Also… When I edited this link some time ago…
If you keep suffering from the "Dreaded Dead Battery" problem at the most inconvenient of times...which means ALWAYS... THIS Video has laid out the very best procedures and links to related Fuse-Type vs, Voltage Drops vs. Amperage Loss Tables and the Best means to seek and find any Parasitic...
gmtnation.com
I included a VERY important Video from Eric “O” over at South Main Auto in which he was FINALLY able to run a Parasitic Draw to ground after contacting an Instrument Cluster Repair Professional and Eric recorded their live telephone conversation for his YouTube Channel Viewers to hear. THAT Technician basically said… “The IC Green Boards in GM Vehicles can suffer from “Silver Creep” which essentially causes Power Wires to ground out across the IC MOBOs and Short Circuit." If you think that your IC Board is involved… When you can... do all of these things:
(1) Test and prove out that your SUV battery is NOT suffering from a Dead Cell.
(2) Properly Charge the Battery to at LEAST a steady 12.5 Volts,
(3) Pull the Instrument Cluster Panel and Dis-Connect the Blue Cable Plug.
(4) Wait a Minimum of 15 Minutes before beginning the Parasitic Draw Down Test.
(5) Proceed with your Parasitic Draw Test following EXACTLY the Same Procedures as on prior Tests.
(6) Compare the results of the Two Different Tests for variance that points to the IC Cluster being BAD.
(7) If this proves ot be the source of the short-out… Replace the IC Board from a PROFESSIONAL RE-BUILDER that uses ‘Unpopular Pb’ Pure Lead Solder as the problems with the Chemistry of the other non-lead solders apparently invites these “Silver Migration Short Outs”. I encourage
everyone concerned with this being the possible source of the issue to download and Watch Eric’s Video in this Link:
https://gmtnation.com/forums/thread...s-for-performing-a-parasitic-draw-test.18966/
You are a Loyal, Long-Time Owner and Driver of the Trailblazer...and You deserve to have this problem 'run to ground'. Keep us updated please... as your ultimate success will help more people than you know.