My second row seats wont fold down

You will need to take the seat apart to determine what is not fastened to release it.

My ford had same problem. I resolved it as follows:

on the side of the seat that has the cable handle that isn't working remove the INSIDE plastic covering. This will just pull off. This is thee plastic piece underneath the seat. Once this is done you have access to the lever that the cable pulls against. My was frozen stuck. I took a long screwdriver and placed it against the top of the lever and struck the end with a hammer. This unseized the lever. At this point the seat could be pulled up but pulling on cable. I then sprayed wd40 on lever joint.

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.

The passenger side 2nd row release lever is at the lower right corner. On the driver side, there is no release lever, just a pull ******** the center of the seat, that sometimes falls between the seat.

Cable is broken or stretched. pick up the bottom seat and see the cable end if broken or slack from being stretched pull that cable and then the back should fold down. Ibelieve you will need to remove seat to repair the cable. the bottom seat when lifted pulls on a cable that releases the backs lock to fold down

Okay so im just going to start from the seat being upright in a normal riding position.

1. You need to fold the head rests first. Pull the black tab under both headrests. They should spring into a folded position.

2. pull the side seat lever (on the door side of the seat). This will fold the top/back support down to an angle.

3. There is one more lever on the backside of this seat. Its in plain sight on the angled portion of your seat. Lift the big plastic lever.

4. While keeping the handle lifted, grasp the back of the seat and pull it torwards the front of the car. The seat should come unlocked and roll forward and down more towards the floor. If you have a bunch of junk on the floor, it obviously wont work. clear the path and the seat will fold completely flat.

Also, your drivers seat and front passenger seat cannot be all the way back, they need to come forward some in order for the second row seats' head rests to clear and fold flat.

i am talking from memory,and i may be wrong........but
look under the front base of the rear seats,you should find 2x screws,undo these and lift the seat squab up and frontwards out the flat possition then you will be able to find the screws that hold the backrest in possition and remove....

On W-Body vehicles, the front seats are secured to the floorpan by two front hook attachments and two rear bolts installed to nuts welded to the floorpan.
The manually operated two-way front adjusters provides only fore and aft movement of the seat. When the seat adjuster handle located on the front seat is pulled up, the seat adjusters unlock, permitting travel of the seat. When the seat is in the desired position and the seat adjuster handle is released, the seat locks in place.
A power operated six-way seat adjuster is available. The adjusters are activated by three 12 volt, reversible, permanent magnet motors with a built-in circuit breaker. The motors are energized by a switch bolted on the seat side panel.
The three motors drive the front seat and rear vertical actuators and a horizontal actuator. When the adjusters reach the limit of travel, torque is absorbed through the rubber mounted grommets located between the motor and the support. An overload relay is provided in the circuit and will open should excessive stall be applied.
The optional 60/40 split bench front seats have seat back head restraints on the driver's and passenger's seat back. The head restraints are designed so they cannot be removed from the seat back without first inserting a small rounded tool inside the head restraint support tube to release the locking tab. The 60/40 split bench seat is equipped with a reclining mechanism on both the driver's and passenger's side. The recliner lever is located on the outboard side of the spring cushion. When the lever is pulled upward, the spring loaded dual linear reclining unit located in the cushion frame is released, allowing the seat back to be pushed rearward or allowing the spring loaded reclining unit to bring the seat back forward.
Bucket seats are equipped with manual reclining mechanisms. An optional six-way power seat adjuster is available. Some bucket seats are equipped with inertia seat back locks. This system allows the seat back to fold forward without requiring the occupant to release a locking lever or access to the rear seat area. During a sudden stop or deceleration, or if the front of the vehicle is nose down, the inertia system of the seat back lock will engage, holding the seat back in its rest position. A release lever is provided to allow manual release of the seat back lock when the vehicle is in the nose down position. The release lever is located at the lower rear outboard corner of the seat back.
Some W-Body vehicles (notably Pontiac coupes) have passenger front seats equipped with an E-Z Entry device. This is actuated, in an unoccupied seat, by completely folding the seat back forward disengaging the adjuster, and sliding the front seat forward to gain access to the rear seat area. To return the seat to its normal position, return the seat back to its rest position, and slide the entire seat rearward, engaging the adjuster.
W-Body rear seats are available in several styles including a rear seat with an integral child restraint device.

I had the same problem. The dealer wanted $400 to replace the latch. I didn't wnat to pay that much so I looked at it and found that the release strap was twisted and jammed in the mechanism. Here's how I fixed it.

I removed the screw from the lever and removed the lever. I pulled apart the plastic housing. It does not come apart all the way but enough to work on it. Pull the release strap that comes out of the back and pull it clear of the mechanism and straighten it out. slip the lever back on and the seat should fold. Fold it up all the way to make it easier to reassemble. Pull the lever back off and slip the release strap back into the slot and make sure it is not twisted or kinked. Snap the housing back together, put the lever back on, and screw it in. Test it and it should work fine. Hope this helps,

Got it, with the help and eyes of my wife. The rear latch releases as the seat back is lowered. This release is ALMOST seat back down (about 3 inches above the seat bottom). As the seat back lowers, apply constant lift on the rear latch, and it will release as the seat back lowers. Hard-won knowledge - I think I invented some bad words in the process.