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Discussion Starter · #1 ·
Hi guys, I had my Cadillac checked for bad codes and up popped ECM. Can someone tell me how to correctly replace the ECM ? So far, I took the engine cover off and found the ECM near the battery compartment. Next, I will disconnect the battery.

Thanks for your help,

Tmac
 

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2016 Escalade ESV, 2017 GMC Sierra 6.2
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Don’t do it. It needs to be programmed by the dealer. Take it to any GM dealer for replacement and programming
 

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Discussion Starter · #3 ·
Okay Cutlass. Just waiting for my ECM to come in the mail by UPS and then contact a GM dealer. Maybe , I saved a little money by buying my own part. Have you heard of Flagship 1 ? This is the company that I purchased the ECM.
 

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2014 XTS V-Sport Platinum
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2,431 Posts
What was the car doing to make you think the ECM was bad?
 

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Discussion Starter · #6 ·
What was the car doing to make you think the ECM was bad?
Every warning light imagined came on and stayed on while driving. I also, lost power while accelerating and the door locks would lock and unlock. Advanced lighting, traction control, park assist, stabilizer etc. Then I took the car to a technician to check the diagnostic codes.
 
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