2006 envoy 4.2L no crank no start!!

Motocross103

Original poster
Member
Oct 31, 2020
7
Muskegon mi
So acouple months ago I had to change motors. Once I got them swamped I had a no crank no start condition. I've read everything I could find on here and looked at "what I thought was everything"! Today I finally looked at the bcm. Once I unhooked the top connector the interior lights came on.. so I'm guessing the bcm is bad???? Here are 2 pictures of the green/gold ground strap and where it connects to the fuse box!! Any insight would be greatly appreciated!!
 

Attachments

  • 16148258189953849062193301616025.jpg
    16148258189953849062193301616025.jpg
    493.1 KB · Views: 7
  • 20210303_204804.jpg
    20210303_204804.jpg
    445.4 KB · Views: 8

TJBaker57

Member
Aug 16, 2015
2,900
Colorado
So acouple months ago I had to change motors. Once I got them swamped I had a no crank no start condition. I've read everything I could find on here and looked at "what I thought was everything"! Today I finally looked at the bcm. Once I unhooked the top connector the interior lights came on.. so I'm guessing the bcm is bad???? Here are 2 pictures of the green/gold ground strap and where it connects to the fuse box!! Any insight would be greatly appreciated!!

That's not a ground strap. That is a flat cable connecting a boatload of essential circuitry.
 

Mooseman

Moderator
Dec 4, 2011
25,317
Ottawa, ON
Which PCM are you using? The one that was in the truck or the one that came with the replacement motor? You should use your old PCM to avoid having to do a security and CASE relearn. If the security light is on, that's your problem.
 

Motocross103

Original poster
Member
Oct 31, 2020
7
Muskegon mi
Which PCM are you using? The one that was in the truck or the one that came with the replacement motor? You should use your old PCM to avoid having to do a security and CASE relearn. If the security light is on, that's your problem.
I'm using the pcm that came with the motor. Only reason I'm not using mine is because its junk.
 

TollKeeper

Supporting Donor
Member
Dec 3, 2011
8,052
Brighton, CO
Then you need to do a security relearn..
 

Mooseman

Moderator
Dec 4, 2011
25,317
Ottawa, ON
PCM Security Relearn

Ignore what I said about the CASE relearn since it's the PCM that came with the motor and will have the crank angle still learned from it.
 
  • Like
Reactions: Motocross103

Forum Statistics

Threads
23,312
Posts
637,820
Members
18,517
Latest member
javier perez

Members Online