My father has a 2008 Chevy Silverado LT1 4.8 V8 1500 Series. Recently he changed the battery and when he hooked the new battery up the truck would not start or crank. He ended up having it towed to the mechanic and they eventually found the problem was that the truck needed a new ECM and reprogrammed the BCM. The mechanic said more than likely my father did not unhook and hook up the battery in the correct order and it fried the ECM and BCM. He was instructed to disconnect the battery in this order: (-) than (+). And reconnecting it in this order: (+) than (-), this will prevent the ECM and BCM from being damaged.
Can connecting the battery in the incorrect order really cause damage to ECM and BCM?
Can connecting the battery in the incorrect order really cause damage to ECM and BCM?