Project HUD

the info control switch ... that's to the left of the cluster next to the driver's side a/c vent outlet?
if so, that's
#25827229
$59.44 - list price
$42.35 - your price

and the connector
#88988295
$34.00 - list price
$21.25 - your price

the HUD connector
#88986454
$244.74 - list price
$152.96 - your price

the dash pad comes in two colors (ebony/black and cocoa/brown)
your vin might help in getting the correct color but it's possible you have an interior that the HUD option was not available with
(it was only available with RPOs 4AL, 4BF, & 4BC)
either way the price is very similar
list price ~$123
forum price ~$88

all parts still available from GM

with regards to MDI/SPS programming vs the TechII if you want to flash a module or option that a vehicle doesn't have you have to call GM TechLine and get them to add that option to the VIN so when you program it with the MDI using the VIN the option is there

we ran into this recently turning on cruise control for a chevy cruze
(oh the irony of a cruze that didnt' have cruise)

the customer didn't explain themselves clearly to us and the tech and I worked for about a half hour trying to figure out why the customer would say that cruise wasn't working when the car clearly didn't come with the cruise control option

when we went back to the customer they explained better that they wanted us to turn cruise on... that was news to me
so my tech called techline and they said that this is the new normal - lots of simple options will no longer require new parts but just new software
so techline added the option and my tech reflashed with the MDI and all was good