Seat not working?

It seems every other function of seat works. When trying to apply more or less lumbar, nothing happens and lumbar just makes a motor working sound. It will move up and down but just not inflate.

Any ideas? How hard of a fix? Are there airbags in the seat which make it tricky to work on? It's a new truck for me.

Pulled the trim. Inspected the grounds. Traced the black wire in the harness (under the sill plate) to where it turns to go under the seat. Checked the ground to that point. Shows a good ground when probing the wire.

Thanks for your kind reply, though that's not exactly an answer to the issue. After further searching I've found out a bit more regarding a cheap plastic piece that could have broken. Shouldn't be a surprise as its American made.

How do I isolate these down to one.

"There's a break inside the switch assembly, most likely where the ground terminal is soldered to the circuit board"
Are we talking about the power seat switch here? No ground present at the switch.

I agree I don't believe all three seat adjuster switches are bad (in 1 assembly).

I have similar 2007 Yukon Denali driver's seat lumbar failure problem. Where can I get this repair manual you mentioned. I would like to rent one for a while to research my seat failure issue.

I have a power seat that won't go up or down in the back. I have power and believe that the worm gear is stuck in the up position. How would I 1) get to it and 2) how would I get the worm gear past it's bound state.

The motor wants to turn and I see the worm gear trying to turn when I hit the button.

The driver's side power seat won't go forward or backwards anymore. It is stuck in the far back position. All the other power functions for the seat still work. The dealer wants over 300 dollars just to diagnose the problem! I hate to think of paying that amount just to replace a switch or motor! Is there any way to move the seat forward without the power? I can still drive it, but my wife is just too short to reach the wheel and pedals, even with the power pedals all the way up!

I have a 2003 gmc yukon xl and the electric seat would not go back when exiting the auto it would go forwards now it is all the way back and wont move any place