contemptor

iTrader: (1)

The sides of my seats have a couple switches right beside each other. I'm guessing they are for some kind of tilt? However, they don't do anything. Bad fuse maybe?

quiksilver9531

yea same with me, I have no idea what they do, they make clicks when i press them but dont do anything, the only one that works is the one in the front to move the seat back and forth and up and down

BlkTARebel99

iTrader: (1)

one of them is a seat tilt, and another is lumbar support.

WhiteBird00

iTrader: (4)

Actually, one is lumbar support and the other is cushion bolster control (it inflates the two side bolsters on the seat to hold you in place. Tilt is controlled by the rectangular gray bar on the side of the seat - push up or down on the front or rear edge to adjust the height of the front and rear of the seat.

contemptor

iTrader: (1)

So is there a fuse or something I could try replacing to make them work?

quiksilver9531

yea mine also don't work but the power seat works, when i press the other two buttons all they do is make a click noise

WhiteBird00

iTrader: (4)

The power seat and rear window defogger are on the same fuse. If the fuse is OK and the seat motion switch works then check the air hoses under the seat to see if they are disconnected or leaking.

quiksilver9531

the fuse is fine, would it make sense for both seats to not work? I want my seats to work!!

quiksilver9531

contemptor, you have any luck?

contemptor

iTrader: (1)

Well if it's the same fuse, my window defogger works... seats don't.

quiksilver9531

ok I took a look under the seat and everything looks fine, if the two controls are for the cusion bolster and the lumbar then there has to be some kind of air compressor, I'm guessing this went bad? because neither seat works, and when i press them i can hear clicking but no air, so I'm thinking its a bad compressor, I don't really know how they work but I can't think of another reason why there not working.

quiksilver9531

just wanted to let you know that the probable reason its not working is that the power seat cushion air control module is bad, if your interested heres the part # 16801420, I work at a shop and my price from GM was 135.66 but at gmpartsdirect.com its 103.10

WhiteBird00

iTrader: (4)

Here are GM's steps for testing "Lumbar Support Inoperative":

1. Connect a test lamp between the power seat cushion air control module connector C1 terminal A and ground. (the air control module is under the driver's seat, connector C1 is the black 6-pin connector, terminal A has an orange wire) Does the test lamp light? Yes, go to step 2. No, go to step 3.

2. Connect a test lamp between connector C1 terminal A and connector C2 terminal D at the power seat cushion air control module connector. (connector C2 is the 4-pin black connector, terminal D has the black wire) Does the test lamp light? Yes, go to step 4. No, go to step 6.

3. Repair a poor connection or an open in the battery voltage circuit of the power seat cushion air control module. Test seat operation.

4. Inspect for and repair a poor connection at the power seat cushion air control module. Did you find and repair a poor connection? Yes, test seat operation. No, go to step 5.

5. Replace the power seat cushion air control module. Test seat operation.

6. Repair a poor connection or an open in the ground circuit of the power seat cushion air control module. Test seat operation.