Multiple codes issue 2017 Tahoe Premier

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Flyboygt

TYF Newbie
Joined
Mar 8, 2019
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First off Ive been having issues with the suspension riding really rough, Ive replaced the Magneride and the rear Air shocks, ive done the suspension ride height reset and it still just rides like crap (i kinda expected it to be a bit better after new shocks)

I do have an AUTEL bidirectional scan tool:
i pulled all the codes today its a mess:

0073 Power steering control module
0073 steering wheel angle
0121 lost comm with electric brake control module
0073 suspension control module
0077 chassis expansion module
b2515:5a body control module
b3006:01 hood ajar battery short
0073 brake control module

ive come across the posts about cleaning the ground points and going thru and cleaning out all of the connectors thru the engine bay and transmission, checking wiring looms, fuses.

any other help would be awesome.
 

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