My 06 malibu rear seat will not go down due to stuck switch

check and inspect the latch for damage

Did you take it to a qualified repair shop? Do you know what DTC'S - diagnostic trouble code's are ?
DTC B1010 08: System Sensors Data Mismatch signal invalid
DTC B1296 01: Movable Roof Header Unlatched Sensor Circuit short to battery
DTC B1296 06: Movable Roof Header Unlatched Sensor Circuit short to ground or open
DTC B1296 58: Movable Roof Header Unlatched Sensor Circuit incorrect reaction after event
DTC B1296 59: Movable Roof Header Unlatched Sensor Circuit circuit/component protection time out

DTC B1307 58: Movable Roof Latch Signal Circuit incorrect reaction after event
DTC B1307 59: Movable Roof Latch Signal Circuit circuit/component protection time out

DTC B1395
S3 and S4 are part of the Rear Compartment Lid Release switch. The folding top control (FTC) module uses S3 and S4 to determine whether the claws at the rear of the deck lid are latched into the deck lid or unlatched. S3 closes and supplies a 12-volt reference to the signal circuit when the claws are unlatched. S4 closes and supplies a 12-volt reference to the signal circuit when the claws are latched.

DTC B3669 01: Deck Lip Position Sensor Circuit short to battery
DTC B3669 06: Deck Lip Position Sensor Circuit short to ground or open
DTC B3669 58: Deck Lip Position Sensor Circuit incorrect reaction after event
DTC B3669 59: Deck Lip Position Sensor Circuit circuit/component protection time out
DTC B366A 58: Deck Lid Latched Left Front Sensor Circuit incorrect reaction after event
DTC B366A 59: Deck Lid Latched Left Front Sensor Circuit circuit/component time out

Your best bet , take it to a qualified repair shop .

there is a cable that runs from outer handle on the seat and connects to a rotating tube/latch at the inner seat frame. you will need to use a long flat scew driver from behind that part of he seat to slip in theat latch and twist to unlatch that seat then you canr repair the cable.

Most rear seats need to be unlatched from the very bottom on each side. Try sliding the driver and passenger seats fully forward. With your back against the front seat press forward toward the trunk on the bottom of the rear seat on one corner at a time near the floor and lift up. This should release the latch. To replace the seat simply slide the seat back into place with the front slightly raised upward and push the seat in toward the trunk then push down til you hear the latch catch.

Check from behind the seat to see that the lever actually moves the latch free. Usually it is like a cam locking on notches that hold the seatback up.

To fold-down rear seat on 2007 Chevy Malibu, follow these steps:
1. Open the trunk
2. Pull on one or both the handles located on the upper side of the trunk
3. The handle located on the driver's side will unlatch the bigger part of the read seat
4. The handle on the passenger side will fold down the smaller portion of the rear seat.
5. Once done, you will have a seat that's nicely folded down.

Remove the rear seat back and cushion and crawl through and manually unlatch the trunk

remove the 4- 40 torque tip screws at bottom of seat lift bottom up remove 18mm bolts on each side these also hold down the seat belts besure to install correctly when reinstalling then fold top of rear seat down and remove 15mm bolts be sure to torque seat belt bolts to 40_45 ft lbs.it can now be removed, two people will help to keep from scratching interior

THE SEAT RELEASES ARE IN THE TRUNK IN THE AREA WHERE THE SPEAKERS ARE NEAR THE EDGE OF THE TRUNK OPENING.

You need to remove the entire rear seat, the bottom & the seat back. Remove both of the rear inner C pillar trims, remove the rear parcel shelf, under the back window.
The speakers come UP from where they are mounted. You cannot take them out thru the trunk.
Hope this helps, and thanks for choosing FixYa.