2012 Suburban LTZ 4wd Inspection - Have questions

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cmatt

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BTW why do some GMT900 SUVs have steel CAs and some have aluminum?


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Doubeleive

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So here’s the $64,000 question. What do you like for brake and differential fluids? Any issues with putting 75W90 synthetic in both diffs?


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I usually just get whatever the dealer sells me, I bought power steering fluid off amazon (oem) but I think I saw the same stuff cheaper at the auto parts store.
 
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That pic of the underside where the spare tire goes, is all that light brown color dust?

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That pic of the underside where the spare tire goes, is all that light brown color dust?

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Yes. It’s coated the waxy GM frame pretty well. Hopefully next weekend I’ll have some time to put it up on ramps, get on the creeper and use the pressure washer (at a low psi).

First, I’ve got to get these K2XX suv harness orders out the door. Been crazy busy at my day job and time has been at a premium.


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swathdiver

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BTW why do some GMT900 SUVs have steel CAs and some have aluminum?

Weight and balance (fore and aft weight distribution).

"Thought" I had it all figured out and the more I learned, the less I knew! All I know for sure is that the XFEs got them as part of their weight reduction plan.
 
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cmatt

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Broken heat shield is very typical. Mine is broken....
Interesting. Any idea what causes it to break? I wouldn’t think anything from the chassis would come in contact with it.


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cmatt

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Discovered the rear HVAC/radio control module wouldn’t work. The buttons illuminate, but no display or function. I can turn on the rear air via the front control.

Pulled the back console panel off to investigate and it looks like a soft drink was spilled. The buttons depress and release very slowly. Prob gummed up with the left over syrup.

I guess I’m buying one. Do they have to be programmed?

I may have to look into picking up a Tech2.


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