I have a 2001 olds intrigue and my abs, trac off, parking brake, service vehicle soon, pcs lights all come on at the same time. But when parked overnight and started in the morning its off and back on again when driven for about 1/2 hour or so. I took it to the shop and got an error code of c00550 which is a ecu malfunction. The mechanic told me its the brake control module under the hood that has an internal fault. Has anyone had the same problem with this? or could it be something else? I just want to make sure because it's very expensive to replace. Thanks in advance.