Quote:
Originally Posted by maxwedge
There is a GM service bulletin for this. 08 06 04 028.
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Thanks for that info, I hadn't seen that bulletin. While it may be related, that bulletin covers 4.3L engine in Silverado and Sierra trucks. As it was dated 4-28-2008, I assume this was an issue on brand new vehicles, and required new ECM software to fix the problem.
This van has run well for me for a couple years before this started, so it seems like I should be able to get it back to the state that it doesn't throw this code without changing ECM software. Any other ideas?