I bought a 2008 White Base H3 in January. It was brand new with 24 miles on it. I have a few questions
1. I have around 9200 miles on it and still no oil change. A tech at Hummer told me wait till the "Oil Change Light" came on. Is this normal and should i be worried??
2. I have put 24 inch rims on a few months ago and the "TPM" light has been on ever since. I was wondering if there is a problem with that and what i should do to fix it?
3. Also i was wondering if anybody had any problems with the bigger rims and what there solution was??

If anybody could answer any of these that would be great.

Thanks
Pat

 

Pat,
On a new engine I would have changed the oil at 1,000 miles. Then every 8-10,000 using Mobil 1 synthetic oil.

Going to a 24" rim is a bit extreme. What size tire did you use to compensate for the increased diameter? This can throw a lot of your electronics like stabilitrac, speedo and odometer.

Welcome to the Forum.

 

HueyIII: Take a read through your manual at this section below, follow the steps, and at the end at step 9. if you heard the horn chirp from step 8. LR tire, you are good. The TPMS warning light does not need to be flashing.

[align=left]TPMS Sensor Identification Codes[/align][align=left]Each TPMS sensor has a unique identification code. Any time you rotate your vehicle’s tires or replace one or[/align][align=left]more of the TPM sensors, the identification codes will need to be matched to the new tire/wheel position.[/align][align=left]The sensors are matched to the tire/wheel positions in the following order: left front (LF), right front (RF),[/align][align=left]right rear (RR) and left rear (LR).[/align][align=left]You will have one minute to match the first tire/wheel position, and five minutes overall to match all four[/align][align=left]tire/wheel positions. If it takes longer than one minute, to match the first tire and wheel, or more than five[/align][align=left]minutes to match all four tire and wheel positions the matching process stops and you will need to start over.[/align][align=left]The TPM sensor matching procedure is outlined below:[/align][align=left]1. Set the parking brake.[/align][align=left]2. Turn the ignition switch to ON with the engine off.[/align][align=left]3. Turn the exterior lamp switch from AUTO to ON four times within three seconds. A double horn[/align][align=left]chirp will sound and the TPMS low tire warning light will begin to flash. The double horn chirp and[/align][align=left]flashing TPMS warning light indicates the TPM matching process has started. The TPMS warning[/align][align=left]light should continue flashing throughout the matching procedure. The SERV TPM message will[/align][align=left]be displayed on the Driver Information Center (DIC).[/align][align=left]4. Start with the left (driver’s side) front tire.[/align][align=left]5. Remove the valve cap from the valve cap stem.[/align][align=left]Activate the TPMS sensor by increasing or decreasing the tire’s air pressure for 10 seconds,[/align][align=left]then stop and listen for a single horn chirp. The single horn chirp should sound within[/align][align=left]15 seconds, confirming that the sensor identification code has been matched to this tire and wheel[/align][align=left]position. If you do not hear the confirming single horn chirp, you will need to start over with step[/align][align=left]number one. To let air-pressure out of a tire you can use the pointy end of the valve cap, a pencil-style[/align][align=left]air pressure gage or a key.[/align][align=left]6. Proceed to the right (passenger’s side) front tire, and repeat the procedure in Step 5.[/align][align=left]7. Proceed to the right (passenger’s side) rear tire, and repeat the procedure in Step 5.[/align][align=left]8. Proceed to the left (driver’s side) rear tire, and repeat the procedure in Step 5.[/align][align=left]9. After hearing the confirming horn chirp for the left rear tire, check to see if the TPMS warning light is[/align][align=left]still flashing. If yes, turn the ignition switch to LOCK.[/align][align=left]10. Set all four tires to the recommended air pressure level as indicated on the Tire and Loading[/align][align=left]Information label.[/align][align=left]11. Put the valve caps back on the valve stems.[/align][align=left][/align][align=left]And.....welcome to the forums.[/align]

 

First, are the TPMS stems even in the tire? If you have a rubber, flexible valve then they didn't move the sensors from the original rims to your 24s. If they are in, then follow the calibration above. FYI the spare in 08s does not have a TPMS sensor; pre-08 all five tires do.

On the oil, I like Vader's recommendations for the H3. I think you can respect the oil life monitor that GM does but it doesn't hurt, except having to pay for it, to do an oil change early. I usually change my oil in the 40% range and use synthetic. (One tangential note - my 05 Civic you specifically did NOT change the oil until recommended by the mfr. as they put in engine conditioning additives in the oil that they wanted in there for 7000 miles or so).

Don't have bigger rims (Bad, bad for offroad) so I can't help there.

 

I just assumed any reputable tire/wheel shop would transfer his TPMS to the new rims. Alrock might have something there, do you still have the TPM Sensors in your new rims?????

If the tire/wheel shop kept your sensors, I would be asking for them to put in new ones at their cost?

 

You know what they say about assuming, right Doc?

 

Yes. [&o]

 

Yeah I would be pretty pissed if they didnt swap my TPMS. out to hte new tires or atleast see if you want to buy a second set for your newwheels. As far as big rims go... 24's are a bit extreme for the H3. I mean you can definatly tuck them but man 35 series tires are expensive when you have to replace 2 a year due to pot holes and other road hazards. Tahts why I went with 22's. Taht way I have a nice lookin' wheel plus plenty of rubber to cover the road and any hazards along the way. Propson the 4's though.