What did you do to your NNBS GMT900 Tahoe/Yukon Today?

Worked some on the physical ethanol sensor conversion. Repinned some wires, made an adapter harness, stared and thought moderately deep thoughts. I'm at a standstill so I'm taking a lunch break. Might go do a little fun work afterward.

Installed new front wheel bearings. SKF xtracker hybrids, thanks to all for the suggestions on wheel bearings.




And disconnected 3rd pin from headlight switch. Because "off" is actually AUTO (on/off) and "auto" is actually OFF! Only noticed because I had BTDieselworks turn off my auto headlamps, and if I accidentally turned them all the way past "auto" to "off" position, it would activate the auto headlights on next near-term startup.




Pulled the pin out somehow? after I ground down a pick tool.. Not sure how I did it, but it took some doing! Ordered some terminal pin removal tools from ebay for next time!

replaced bank 2 upstream oxygen sensor and also replaced the plug for oil level one of the wires was messed up. Wasn’t as bad to do as I thought.

Doubeleive said:

how did you find the leak? were you able to see it from the inside?

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I was doing the typical tests with a hose by the sunroof, top of door seals, and the cowl area and none resulted in any water inside.
Then I decided to take the fender off and sprayed water at the seam sealer and water immediately made it inside.
I had already pulled the carpet away from the corner under the MBEC junction block and was able to see the water pooling.

What are the names/part numbers for those rubbery flappy panels on each side of the radiator that help direct airflow into the radiator?

I've seen them posted and talked about in the forums, but don't know what to search for

@swathdiver @Geotrash

gooffeyguy said:

What are the names/part numbers for those rubbery flappy panels on each side of the radiator that help direct airflow into the radiator?

I've seen them posted and talked about in the forums, but don't know what to search for

@swathdiver @Geotrash

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I ended up making my own sets for thecopcar and theothertwin using coreten.

Sparksalot said:

I ended up making my own sets for thecopcar and theothertwin using coreten.

View attachment 397596View attachment 397597View attachment 397598View attachment 397599View attachment 397600

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I have a sheet of that in the garage, but I hate mocking it up/figuring out the dimensions and cutouts for lines, etc.

gooffeyguy said:

What are the names/part numbers for those rubbery flappy panels on each side of the radiator that help direct airflow into the radiator?

I've seen them posted and talked about in the forums, but don't know what to search for

@swathdiver @Geotrash

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It shouldn't baffle you (or maybe it should). https://www.gmpartsgiant.com/parts-...l_system/radiator_mounting_related_parts.html

gooffeyguy said:

I have a sheet of that in the garage, but I hate mocking it up/figuring out the dimensions and cutouts for lines, etc.

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Honestly, it took longer to paint them, than fabrication.

gooffeyguy said:

What are the names/part numbers for those rubbery flappy panels on each side of the radiator that help direct airflow into the radiator?

I've seen them posted and talked about in the forums, but don't know what to search for

@swathdiver @Geotrash

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Here are the numbers for mine, should be the same but double check: