2008 Yukon XL Denali hood open fault/ tow mode, manual mode issues

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MrMushu

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Got a new to me 2008 Denali.

I'm trying to sort through a few bugs that were present but were not mentioned when purchased. The seller is going to fix all issues but I have to troubleshoot before hand.

My cruise isn't working. I have a hood open fault and I'm wondering if that's causing the issue with the cruise.

Which wires can I jump together to get the hood open error to go away? There are three wires. I've searched on google but can't find anything solid.

Also, when I put it in tow mode it runs fine until around 45-55 mph. It doesn't want to shift up. When it does it down shifts back down really hard with rpms really high.

Lastly, it won't go into manual mode. Nothing I do will make it go into manual mode.
 
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MrMushu

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Fixed the hood open fault. Tied the purple and black wires together on the plug side of the harness.

Got a brake sensor switch from the auto parts store and fixed the cruise control.

Still having an issue with tow mode and not going into manual mode.
 

97audia4

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Tow mode is harsh, how much are you towing?

I towed a 2500 lb trailer up to NY hills and back from PA and tow mode as over kill.

It also wont shift in tow mode if you try to use it.
 

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