avalonandl
Full Access Member
Thats actually very good price. Drive it and take on a long test ride. Do corners, brake test, etc. Chk all lights power door switches etc.
Prices are high but what are your thoughts on this '09 LTZ?
- Thread starter DavidZ71
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Newbie here - I hope you do not mind me asking -- What is AFM? I just purchased a 2013 Chevy Tahoe LTZ with 95k miles. I found this forum and saw this message and wondered if its something I have or need to have done to mine?
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Hopefully a mod will move this to the Introduction section. Welcome to the forum from Oregon.
To answer your question. Lots of threads here about disabling AFM. My year rig does not have it so I don't have to deal with it but others here will chime in. Is best to join and introduce yourself in the Introduction section and then start a thread for your rig in the 2007 to 2014 section, about the AFM, and then you will get more responses.
No biggee, you will learn and the mods will help.
hi PNW VietVet - thank you so much for the info
I will go introduce myself. I truly appreciate it! Have a wonderful week/weekend!AFM is short for Active Fuel Management, also known as DoD (displacement on demand) and Cylinder Deactivation (I think the way GM refers to it internally). It is a software and hardware design that allows the engine to drop into 4 cylinder mode when loads are light.
AFM in later models (like yours) seems less problematic as earlier years (like mine, 2007). The most common issue is an AFM lifter collapsing causing that cylinder to misfire permanently. Later models have modification to the lifters and other parts of the system to make it more durable. You can turn it off in software a number of ways and also eliminate it in hardware, basically turning your engine into a non-AFM version.
I think if I were in your shoes, I would disable it in software, there are a number of ways to do that, with various pros and cons to each and forget about it.
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I would not buy it unless a independent mechanic or a Mobile mechanic checked it out from top to bottom just to be sure because I generally do not believe anything I hear and very little of what I see.
But that is just me.
With that said the price is good if all checks out. Hopefully it was serviced every 5K miles.
EvergreenZ71
Full Access Member
I’m still a newbie on here too but I don’t think it was confirmed that it was a 5.3L vs 6.2L which IMHO makes a huge difference on the value at that mileage.
Good question.
It is the 5.3. Here is a photo of the compression results... Does this look healthy for the 5.3? It was done very recently.
http://imgur.com/a/6HMqql7
http://imgur.com/a/6HMqql7
That looks good. Slight differences on driver's side but is ok.
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