NEED HELP 2006 Trailblazer 4.2 engine stall P2431 Code

ar7

Member
Engine was cold and attempted to stall out, check the codes and got a Pending P2431 (not hard set - sure it will).

Anyone run across this and/or any help advice?

thanks
 
Last edited:

Mooseman

Moderator
This is related to the SAIS system. A Failure prone and useless system. What we recommend is to delete it and have the codes deleted from the PCM with a tune. As a quick fix to get it going again right now is to go to a pick-a-part yard and get a block off plate, remove the SAIS valve and block off that port just above the exhaust manifold. Pull the SAIS fuse. You can drive it like this until you can get the PCM tuned.


Removing Secondary Air Injection System
Air Check Valve delete parts: GM 2574378 & GM 24577193 ...
SAIS gasket (Reasons to delete SAIS and tune)
 
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