Doonatic

Hello all, has anyone experience the "brown" mirror issue. seems as if the reflection has became brown, and the auto dimming feature no longer works. IF so, can anyone provide some more insight, a possible part number, description on what type of mirror it is, if it is heated or not (without taking it apart of course)….

RPO code?

Old guy, i thought that as well, however when it is in reverse the noise that is emmitting from underneath is coming from the transfer case, not the transmission. Its as if it is a solenoid motor that is not engaging.

Hey yall, got a question for you. For the 2003 2500hd’s, Chevy offered 3 different types of transfer cases. Does anyone know how to identify which transfer case is installed in the vehicle one may have. I am moving into my 3RD transfer case (factory installed chain ground a hole through the case years ago, dealer installed a “new” used one, and now this one will not engage reverse). I am vigorously searching for a new case NOW, because I am afraid my vehicle will leave me stranded very soon. (Side note: I get a grinding noise-like the chain is rubbing ONLY during coasting.) So if anyone can help me find the part numbers or the direction to locate said replacement parts, that would be amazing.

Zebebad, what steps did you actually take to rectify the situation?

Thanks for the information. I have a 03 2500hd, 6L, with 204k, and a week after my last oil change (I do it myself) I was traveling on the interstate, and climbing a steep grade, and lost oil pressure four times. Truck did not shut off, but did scare me right away. I stopped and checked, and nothing was leaking, so I thought pump problem too, but if it was the pump, the motor would have seized. So I knew I had to do process of elimination, and I started with the pressure switch, and was hoping it was not the instrument cluster (again). My pressure gauge before the change read about 60#, but now lingers around 40#. The blocks between 5.3 and 6.0L should be very close to the same. What I did not know is about the filter on the pressure switch. I will check to see if I have one next week when I do an oil change. It may not be installed on an 03.