My wife bought your remote-controlled Hummer H2suv. There was no controller. What can we do?

well first go to GM and ask for RPO look up from VIN
learn the engines (day1new) RPO code!
first.
the dealer can use the engine serial number too.
the service manual shows how to find, all VINs
engine and tranny seriels. in chapter 1.
Gm makes this all so easy so do it. ask them,.

Hummer reset bcm Questions & Answers (with Pictures) - Fixya

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please post a real question.?

above is a statement , only.
like do i have it.
how can i tell, what I have, answer read the operator guide i the glove box. it tells you how to use it and when not to ,etc.
so no use 4wd until you learn to use it, it can be dangerous.
on most cars, like this the knob shows the word lock, for AWD systems.
if not there, its locked all the time, called part time 4wd.
if really curious. why not photo post your controls and ask.
option vary.

ask a question, please above is a statement, a noun..
how does it work?
how to test it?
where to buy it.?
how to xxxxxx answer xxxxxx?

what is the question?, the above is a statement.?

I don't have a shop manual for a Hummer.
But GM trucks built in 2007 use something other than the alternator to control voltage. Sometimes its called a generator control module and sometimes it is inside the body computer or the ECM.
You may need to check with someone who specializes in Hummers for the answer.

rock auto . com

sorry but i think you will need a garage to re-programme the remote for you so you may need a hummer agent in italy ??? perhaps if you try again with a question when the american time zone is daytime then a american mechanic might know how to do it ?? but iam in spain so i dont see many hummers ,fiats yes

The remote is probably bad - Take it to AutoZone and ask them to test the radio frequency of the remote. If it is bad you will need to get a new one - if not - remote control door lock receiver in vehicle is bad...and will need to be replaced and reprogrammed - you need to have special tools to reprogram the remote control door lock receiver.