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In my last vehicle, a 2005 GMC Envoy, I could put the recirc air on in about half the settings, the Tahoe only 2... I understand why it does what it does, but I would like to have control over it. Apparently the GM engineers never drive in the NYC outskirts where we have 20 year old vehicles...

I love my 2008 Tahoe that I've owned for almost 5 months, but there are a couple little things it does (or doesn't do) that really annoy me. I think a simple re-program of certain parameters in the computer would probably take care of them but I'm not sure if it can be done and if so, by whom...

It does it approx every third time I drive the truck. My trips are generally 20 to 30 minutes. Once it's down around 12.5V it doesn't go back up to 14 until I shut it off and start it again. Then it usually runs high around 15V for a few minutes until it settles down to either 14V or 12.5V...

That's what I figured... Brodg wasn't clear with his posts.

I had a similar problem, though no chimes, just dropping voltmeter. Copied from another post: Document ID# 2000522 2007 GMC Truck Yukon XL Denali -------------------------------------------------------------------------------- Subject: Voltmeter Gage Fluctuation - keywords...

I too have a 2008 2LT Tahoe with power mirrors, but without memory or power fold. Are you saying that all power mirrors have power fold? If so, how do I activate this feature?

I just got my 2008 Tahoe back from the dealer for the same issue. It seems the service writer hadn't heard of this either. It's very disconcerting... Especially as it didn't exhibit this behavior for the first 3 to 4 weeks of ownership. Perhaps it doesn't do it until it hits the 1000 mile...