FMG good find, I've never seen that.

Obviously I don't read directions

 

So I can drive it? ??

 

Yes, but the CEL will come on, might run poorly.

 

So I got the sensors put on tonight then drove home (((half hour))) never coded and the HHR drove fine... tomorrow morning we begin the tune...

 

You will smile from ear to ear. Hope the tune goes problem free and easy.

 

So long story short... got tune loaded... worked for about 10 mins then got these two codes p0557 and p258a both codes are there because i do not have the Vacuum assist break mod.... so at this point not sure what to do...

 

Why was the tune set to the vac assist? The tuner should have tuned for the absence of the mod.

A member was trying to sell that kit a while ago, check in the classifieds.

 

I should have said this is 2005hhrautos e47 tune and he did tell me about the break assit issue and I absolutely forgot when it came time to load it...I have emailed Dave/2005hhr if the tune can be changed for a car without the mod but have not heard back yet...

 

This ad!

https://www.chevyhhr.net/forums/inac...e-issue-57075/

Send him a PM

 

You don't need that. It's literally as simple as switching off those codes. Now, how exactly did you "tune" this. (I'll find out more tonight) but for our readers I'm curious. Another thing to note, Dave's tune is layered on the GMTU "base". Whereas yours and mine are on the stock "base"

You have a friend or a tuner with HPT, which is it? How are you loading Dave's tune? You should be using his as a guide and modifying ("calibrating") your tables accordingly. If you're just straight copy/pasting every table, that's asking for trouble if you don't have experience with the LNF.