quit running while going down the road. Will not restart. Codes P0101, P0530, P1626, P1810. Got rid of codes, got P1626,, U1301, B2948 and U1000. Security light varies whether is stays on or comes on just after cranking. Module communication with PCM, BCM, IPM. At Ignition switch, got 12v from BCM, 5v signal KOEO and 3.5V KOEC. Low Ref .25V. Tried to check Class @ Voltage from BCM to PCM. The wiring diagrams from Alldata and TIS do not match my BCM
JA: Does the light flash, blink or stay solid? Have you tried to reset the security system?
Customer: Does not flash, can not get it to go into relearn
JA: What is the model/year of your Chevy?
Customer: 2003 (Oct 2002) Chevy Suburban K2500, 8.1
JA: What year is your Suburban?
Customer: 2003 with a build date of 11 October 2002
JA: Are you fixing your Suburban yourself? What have you tried so far?
Customer: I am fixing it my self. My first paragraph is what I have done so far
JA: Anything else you want the mechanic to know before I connect you?
Customer: BCM has 5 connectors, the main 3 are 24 cavity connectors in stead of 3 connectors 2, 24 cavity and 1, 8 cavity connector