Would it be possible for a scan tool like his to log the class 2 traffic data that you’re looking for?
Here is a brief example of such a data file. These are the actual data messages being seen on the class II serial data network of my friends 2007 Rainier (5.3) as I inserted the key and turn only to the ACC position. Note the timestamps which register in milliseconds to see just how fast this rather "slow" Class II traffic is. The beginning is me setting up the OBD2 adapter. The key to ACC doesn't happen until 12:55:07.356 near the end of this logfile clipping. The last line of this clipping is the PCM reporting it is awake and online. In each message the third hexadecimal pair is the node address of the sending module. 40 is the BCM, A1 is PDM, A0 is DDM, A7 is RSA, and a host of others. Evidently for a 5.3 with both CANBUS and Class II Serial Data networks the PCM uses node address 11
on the class II network.
12:54:26.920 ath1
12:54:26.929 OK
12:54:26.929
12:54:26.929 >12:54:29.407 ats1
12:54:29.421 ats1
12:54:29.428 OK
12:54:29.428
12:54:29.434 >12:54:32.012 atal
12:54:32.029 atal
12:54:32.040 OK
12:54:32.040
12:54:32.040 >12:54:35.087 atma
12:54:35.168 atma
12:54:35.172 SEARCHING...
12:54:37.626
12:54:37.640 STOPPED
12:54:37.648
12:54:37.648 >12:54:47.164 attp2
12:54:47.233 attp2
12:54:47.238 OK
12:54:47.238
12:54:47.238 >12:54:51.072 atma
12:54:51.086 atma
12:54:53.793 88 FF 40 02 2E
12:54:53.897 28 FF 40 06 03 00 0F 7F
12:54:53.908 68 96 40 91 5D FF 4A
12:54:53.908 88 87 40 85 1F
12:54:53.908 68 CE 40 09 22 0E 0E FE
12:54:53.908 8A C3 A1 12 1E F1 12
12:54:53.918 8A C7 A1 21 26 4A
12:54:53.927 EB C6 40 61 26 16
12:54:53.927 88 CF A1 09 22 08 08 44
12:54:54.005 8A C7 A0 A1 22 78
12:54:54.005 49 FE A7 06 46
12:54:54.005 88 CF A0 09 22 04 04 C5
12:54:54.005 28 FF 40 06 03 00 0F 7F
12:54:54.005 88 CF A6 09 22 12 0E 77
12:54:54.005 8A C7 A2 21 40 1C
12:54:54.024 28 FF 40 06 03 00 0F 7F
12:54:54.024 8A C7 A2 21 41 01
12:54:54.024 6A EA 40 20 91 00 43
12:54:54.024 8A EB A0 12 22 00 70 00 F8
12:54:54.024 6A EA 40 20 9E 00 E0
12:54:54.024 88 CF A0 09 81 04 04 B9
12:54:54.024 88 CF 40 07 01 09
12:54:54.024 88 CF A1 09 81 08 08 38
12:54:54.058 88 DF 40 11 FF F4
12:54:54.058 AA EB 60 20 91 00 93
12:54:54.070 E9 DE 80 51 08
12:54:54.070 EB C6 40 61 22 62
12:54:54.070 E9 DE 60 51 5E
12:54:54.070 EB C6 40 61 40 CC
12:54:54.070 AA EB 60 20 9E 00 30
12:54:54.070 EB C6 40 61 41 D1
12:54:54.070 68 96 40 91 52 01 30
12:54:54.206 68 96 40 91 5D FF 4A
12:54:54.227 88 87 40 85 1F
12:54:54.325 88 CF 40 07 01 09
12:54:54.384 28 FF 40 06 03 00 0F 7F
12:54:54.717 AB C6 40 21 22 17
12:54:54.724 8A C7 A0 A1 22 78
12:54:54.724 AB C6 40 21 26 63
12:54:54.724 8A C7 A1 21 26 4A
12:54:54.724 EB C6 40 61 22 62
12:54:54.724 EB C6 40 61 26 16
12:54:54.724 08 FF 80 03 25
12:54:54.736 68 97 80 91 52 01 FB
12:54:54.736 CB C6 16 21 2A DC
12:54:54.762 CB C6 16 21 2E A8
12:54:54.789 68 97 80 11 52 00 26
12:54:54.828 68 96 40 91 5D FF 4A
12:54:54.853 68 97 80 91 5D FF 81
12:54:54.853 8A EB 60 30 01 01 16 02 12 01 17 73
12:54:54.876 88 87 40 85 1F
12:54:54.876 8A EB 60 30 03 01 16 02 12 01 17 C9
12:54:54.889 88 FB 40 04 37 32 31 37 CA
12:54:54.902 8A EB 80 0C B3 00 87
12:54:54.902 88 FB 40 05 30 37 33 39 E3
12:54:54.902 8A 94 80 05 B3 00 00 E6
12:54:54.914 6A 94 80 06 98 C5
12:54:54.926 AA 95 97 06 98 76
12:54:54.926 8A EB 80 30 00 01 0C 02 10 01 0D CB
12:54:54.932 AA 95 A7 05 B3 00 00 05
12:54:54.955 8A EB 80 30 03 01 0C 02 10 01 0D 2C
12:54:54.955 8A EB 80 30 04 01 0C 02 10 01 0D A2
12:54:55.043 AA 95 89 83 B2 9A
12:54:55.102 88 87 40 85 1F
12:54:55.124 CB C6 16 21 2A DC
12:54:55.141 CB C6 16 21 2E A8
12:54:55.204 88 CF 40 07 01 09
12:54:55.947 CB C6 16 21 2A DC
12:54:55.956 CB C6 16 21 2E A8
12:54:55.956 88 87 40 85 1F
12:54:56.087 88 CF 40 07 01 09
12:54:56.728 08 FF 80 03 25
12:54:56.740 CB C6 16 21 2A DC
12:54:56.740 CB C6 16 21 2E A8
12:54:56.831 88 87 40 85 1F
12:54:56.945 88 CF 40 07 01 09
12:54:57.524 CB C6 16 21 2A DC
12:54:57.538 CB C6 16 21 2E A8
12:54:57.707 88 87 40 85 1F
12:54:57.840 88 CF 40 07 01 09
12:54:58.304 88 CF A6 09 81 12 0E 0B
12:54:58.321 CB C6 16 21 2A DC
12:54:58.321 CB C6 16 21 2E A8
12:54:58.582 88 87 40 85 1F
12:54:58.691 88 CF 40 07 01 09
12:54:58.712 08 FF 80 03 25
12:54:59.111 CB C6 16 21 2A DC
12:54:59.122 CB C6 16 21 2E A8
12:54:59.441 88 87 40 85 1F
12:54:59.623 88 CF 40 07 01 09
12:54:59.920 CB C6 16 21 2A DC
12:54:59.960 CB C6 16 21 2E A8
12:55:00.710 08 FF 80 03 25
12:55:02.709 08 FF 80 03 25
12:55:04.707 08 FF 80 03 25
12:55:06.709 08 FF 80 03 25
12:55:07.356 28 FF 40 06 04 01 0F B9
12:55:07.387 08 FF 97 03 68
12:55:07.387 68 96 40 91 5D FF 4A
12:55:07.387 08 FF 11 03 14
Starting after this line"12:54:51.086 atma":
The BCM sends a "bus wake up" network control message to all listening modules.
The BCM sends a power moding message advising the listening modules of the desired vehicle network status or operation.
The BCM sends a message to the audible warnings system because the door is open and the key is inserted. (The radio acknowledges this message just under one second and like 40 something messages later and the radio sounds the chimes)
The BCM sends a message reporting that a key is inserted in the ignition.
The BCM sends a message to a manufacturer reserved function. I have not yet identified this one but I can see where the DDM, PDM, and one other module I have not identified yet respond to this BCM message.
The PDM reports a status of its' mirror.
The PDM reports its' door is closed.
The BCM acknowledges the PDM door closed message.
The PDM reports a status of that previously mentioned unknown function.
The DDM reports that door is open.
The RSA (rear seat audio) requests the status of the network.
The DDM reports that previously mentioned unknown function.
The BCM again sends the network status power moding message. (108 milliseconds after the first such message)
And so on and so on and so on....
An edit/footnote: I realized I said the BCM commanded the chimes on because a door was open but at that time the BCM didn't know a door was open as it had not been reported by a door module yet. So... it is true the chimes were commanded but I am unclear on why.