I just purchased a 07 suburban 1500, used w/ no warranty. Now service tire monitor system light is coming on and service air bag light is coming on. I've repeatedly taken it back to the dealership where I purchased it and no results please help!

 

if the tpm light is on solid the air pressures are low. if the light is flashing, there is a system fault. Does the dic display all four tire pressures or a --?


For the airbags, you will need a code to start diagnosis. This system is not for a backyarder to repair. Try another shop.

 

Welcome to the forum...
Will need a bit more info to work with, do you have factory wheels on vehicle, its possible a previous owner changed the wheels and did not bother with the pressure monitors or used aftermarket ones or simply the factory ones have had their batteries die...
I agree with Tech2 on the airbag, need codes to address and is not something you want to poke around at without proper knowledge of how to properly disarm the system...

 

Factory wheels are still on my suburban

 

Since it is an '07, it's possible the battery in one of the monitors died. IIRC, there's a scanner than can detect battery life but I think it's a dealer thing.

As for the airbag sensors, if you can't find a OBDII scanner to read the diagnostics on it from an auto parts place, prior to going to the dealer you can check one thing on your own. Check the two sensors at the front bumper. Some were over torqued at the factory and ended up with cracked housings. Mine lasted 100k till the light came on. Checked them both this weekend and found one cracked. Swapped it with a new one and the lights gone.

Hope this helps some.

 

Discount tire here in Texas has the battery reader and they will read them for free, I'd check with a local tire shop, they'll likely read them for you if they think they can sell you set of sensors

 

I recently upgraded from passenger tires to truck (10 ply) tires on my 09 suburban. The recommended pressure in the tires is 55-60 psi when not towing my travel trailer, 75 psi when towing. Now every time I start the truck I get a warning: check left rear tire pressure, followed by the same thing for the right rear. I have not swapped the front tires yet but will be this week. I am thinking that 55 psi must be above the point where it triggers the warning, is there a way to set the warning to come on at a higher pressure? Or when I swap the front and there is no longer a 20 psi difference between the front tires and the rear tires will these warnings stop? I was just told by a coworker that the warning is triggered by the vast difference between the tire pressures

 

I have an 07 Tahoe sensor that went out. In order to replace the sensor I have to disconnect the battery for 30 min. As this disconnect will erase all memory can I use a 9v computer memory saver to keep the settings or will the airbags engage?

 

what sensor are you replacing?