testdrive

I had a dash mounted led light wired so it would turn on when the transfer pump would run. It would first come on about 2/3 tank and run for 5 minutes and then go off. Its time on cycles were between 2/3 and down to 1/2 tank. You never saw the gauge do anything except continue to drop in the normal 8.1L manner. My rear tank is 11 gallons, front is 26, total of 37. This method is used on all of the two tank Suburbans, Yukon, and medium duty 3500-5500 series trucks. I studied this in preparation for my transition from the 8.1L to a LBZ Duramax in my 2003 2500 Suburban. And the system will set a code if the sending units don't report readings properly.

GM has a fix for the loud chimes that are coming from the Bose type radio system. They have a re-flash for the radio that does 2 things. First it lowers the volume of the chime and second it changes the volume settings so the settings are not "stacked" up at the lower end of the volume control. In other words you will have a little more control of the audio at the lower volume setting. less level jump for each click of the knob... I am not sure of the part number of the flash, but talk to a service advisor and have him look it up under the radio system. First try this number 12572600, but I am not sure. This will make the chime much more normal. Mine was done under warranty. Also make sure that you have the chime volume set as to the chime level adjustment found on page 3-137 of your owner manual. And if they are willing, have them do the "dimming of the blue high beam indicator" It changes the brighness of the blue high beam indicator. I think the flash part number is 12572521. Good luck testdrive