On vehicles with this
feature, the knob is
located on the front of the
driver seat lower cushion
on the inboard side.
Turn the knob clockwise or counterclockwise to increase or decrease the lumbar support.
Chevrolet Cobalt Service & Repair Manual. Timing Chain, Replace
Caution: With the timing chain
removed, avoid turning the camshaft or crankshaft. If movement is required,
exercise extreme caution to avoid valve damage caused by piston contact.
1.
Disconnect and isolate battery ground
cable.
...