Attention: For no heat/over heat issues

[icecruncher]

anyone know if this is covered under the powertrain warranty?

Or only under the bumper to bumper?

I've got 8 months left on the powertrain warranty only. I doubt it, but worth asking anyway.

Also what was the typical bill on having a dealer do this?

[icecruncher]

Let me share my experience on this.

It really started acting up and finally became unusable.

Car overheating got worse, in two miles to drive home Thursday night, I had to stop 4 times to let the engine cool down.

So, I went to take it in the next morning and same issue. Had to stop every 1/4 mile or so to cool down from 250 (light coming on). After about 5 times doing that, I was 1 block from the dealership (less than 2 miles from my house) and it wouldn't start at all.

So then I had to call a tow truck and have it towed the last block to the GMPP dealership I always go to.

They fixed it at no charge and paid for the tow along with checking complete system over and sent me on my merry way. I was stressing major on this.

It was there for two days but it's fixed now - for good I hope. Drove it tonight for 1 1/2 hours with no issues. Temp hovering at 194-199 most times. Stop and go it went to 205, but then right back down to 198 when started moving.

So, I got the issue fixed under warranty and it was marked that way on the paperwork from the dealership.

I don't know if this is typical, but just thought I'd share my experience in Charlotte, NC.

Maybe was nicer because we take both our cars there and the company I work for has a fleet account with them. But in any case I'm not complaining.

[DTYBOY]

Hey. i have a gxp coup and have had the same problem. First the dealer changed the thermostat didnt work then emptied and flushed and vacumed system didnt work . Then an employee found a bulliten somewhere and started tinkering with a bypass valve somewhere and low and behold .... problem fixed !
Just thought i would let you all know.

[GMCustomerSvc]

Sorry to hear about this issue. Please keep us updated. If you have it or plan on having it at the dealership, please let me know if a PM with your VIN#,name, situation, contact information, dealership information, and current mileage. I hope this is resolved quickly. Thank you.

Matt,

GM Customer Assistance

[icecruncher]

Actually, I don't think they did the TSB, I still have to check. It appears they just replaced a couple gaskets and refilled. I'll check matching the warranty info against the TSB.

I'd really like this fixed per the TSB bulletin, so I'll be looking into it once I get a spare moment.

[rob the elder]

I just got my second set of check valves. It looks like the installation procedure is simple and very straight forward. If / when I see any problems with the wife's 2.0 I will do the install.

I got mine is 3 days from CED.

[neurodaemon]

I just picked up a 2007 GXP with 82k miles on it, and I've had this overheating problem since the second day I took it home. Because it didn't seem consistent, I didn't think it was the thermostat, feared that it could be the water pump, but it turns out to be the bubbles. I read on a different thread that you could raise the reservoir and rev the engine to 5500 rpms to push the bubbles out, which worked... but only temporarily. I plan to go for a long drive this Sunday and hope that I can get it fully resolved before then. But it sounds like I can have a dealer vacuum my system until I can get the TSB solution installed.

[rob the elder]

Give this a look.

Coolant bleed procedure - Saturn Sky Forums: Saturn Sky Forum

GS Stage1 has also made his own video on the Sky forum demonstrating how you can manually force the air out of the system.

Driving it with an air bubble is not something I personally would do. You run the risk of overheating and causing expensive damage. If its the thermostat, with or without air bubbles you can get different symptoms and the potential for serious damage is ever present.

Were it my car, I would take it to my tech and have him follow the procedure to install the check valves and clear the air out of the system.