1) Remove the black trim around the cluster. This is held on by 2 7MM screws on the top of the trim piece. There are also 2 clips on the bottom. Remove the screws and give it a firm but gentle pull towards the wheel.
2) Now you will see 4 black 7MM screws holding the cluster in the dash and 8 silver T-1 torx screws holding the cluster together. First turn the key to the off position, not the lock position, and put the gear selector in Low 1.
3) Loosen the cluster by removing the 4 black screws and pull the cluster towards you. There are no other cables or clips holding it in. There are only two plugs in the dash that it plugs into. Just be careful not to break the shift indicator cable that is on the cluster. You can't buy just this piece from GM.
4) Now here is where you should take your time and be sure to pay attention to how this comes apart. Take out the 8 silver torx screws and put them aside. Now the whole front of the cluster is loose. Take off the clear cover, then the large black trim behind that, then the thin black piece, and the shift indicator with the green window. The indicator with the window you will have to put aside but remember BE CAREFUL of the cable.
5) Now you will see the display in front of you. There are 4 RED TORX screws holding this to the cluster. Remove these screws but be careful because these are the only things holding this display to the cluster. This is the problem. When you take this out, you will see two rows of soldered dots on the display, one on top and one on the bottom. Clean these with contact cleaner or alcohol. You will also see two black towers with little spring loaded tabs in the cluster. Clean these with alcohol also.
6) Now just reverse the procedure. Just be careful of the temp. gauge needle when you put the thin black trim piece back in place. Put the cluster back together and then just push it back into place before you put all the trim back.