GM: Car Port for XT4 2023

[garrettpall]

Car
Cadillac XT4 2023

Route
162796f1469f2f1b/00000005--6f334eda14

Checklist

• added entry to CarInfo in opendbc/car/*/values.py and ran selfdrive/car/docs.py to generate new docs
• test route added to routes.py
• route with openpilot: 162796f1469f2f1b/00000005--6f334eda14
• route with stock system: 162796f1469f2f1b/00000003--79f5d5854f (old harness design)
• car harness used (if comma doesn't sell it, put N/A): N/A GM SDGM Harness openpilot#32471

Supersedes commaai/openpilot#30420

[github-actions]

Thanks for contributing to opendbc! In order for us to review your PR as quickly as possible, check the following:

• Convert your PR to a draft unless it's ready to review
• Read the contributing docs
• Before marking as "ready for review", ensure:
  • the goal is clearly stated in the description
  • all the tests are passing
  • include a route or your device' dongle ID if relevant

[adeebshihadeh]

This ports looks smaller than I remember? If this is it, I think we're good to merge it.

[garrettpall]

This ports looks smaller than I remember? If this is it, I think we're good to merge it.

Let me test it on Friday. I haven’t tested since the switch of cars to opendbc. But the smaller port is due to an updated harness design (intercept different pins).

[adeebshihadeh]

Converting to draft until then. We should also update the test route.

[garrettpall]

Tested with car moved to opendbc. Everything works as expected.

Route: 162796f1469f2f1b/0000009d--717c2e1c0a

(note: I have a SASCM (sdsu variant) installed that broadcasts 767, 4, this was added to the fingerprint for testing locally but should not be included upstream. This route demonstrates the port works, the route in the PR should be used as good, clean data)

[jyoung8607]

CI test route still needs to be uploaded: