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I have never posted here before, but I can't find much on this bulletin. I have a 08 HHR and came across this bulletin when searching for multiple engine code issues. I have a lot of check engine codes and this bulletin looks like the fix and has something to do with replacing terminals on connector C3 on the VCIM at terminal 2,3,8, and 9. Trying to get my hubby some help. Illustrations and pictures would be helpful.

Google returns lots of info. I think the one you are talking about is the connector to the ECM.

Sometimes you can fix it by DISCONNECT the negative terminal on the battery, THEN remove and reinstall the connectors to the ECM and add some dielectric grease to the contacts. Sometimes one or two of the pins can be loose or have the wires get frayed.

The VCIM is the OnStar/Bluetooth module. That lives behind the rear quarter panel cover, passenger side (I think). The same fix is described.

Here is a fairly good link: http://www.justanswer.com/chevy/4oxq...107-u2107.html

Thank you for your help!! Will have my hubby check it out and see what happens. I will check back in and let you know what happens.

The codes we are getting are P0300, P0301, and P0354. It starts fine but the engine light is on and every so often the transmission jams into gear and the service traction control light comes on.

Welcome to the site:smile:

The p0300 is random cylinder misfire the p0301 is cylinder number one misfire and p0354 is coil number four primary fault.

You may have more than one thing happening here.

I'm thinking you have a bad coil on number four cylinder and maybe some carbon build up.

I would guess that if you fix the p0354 code and run some fuel cleaner through it the others may go away.

I didn't see those codes listed in the TSB.

Can you tell me where the ECM is located?

Yes.

It's under the "Darth Vader" hood in front of the under hood fuse box.

Thank you!! You guys are awesome with your help my hubby will know my HHR inside out.