Where is the left side third row impact sensor located on a 2005 Yukon

Fuse box diagram.
https://www.autogenius.info/lincoln-ls-2000-2006-fuse-box-diagram/
Some good info on fan operation of you car on below link.
https://www.justanswer.com/ford-lincoln/7k3bc-lincoln-ls-05-lincoln-ls-cooling-fans.html

Just a thought: If you have two electric fans one comes on when you turn the A/C on the other does not come on till the car reaches normal operating engine coolant water temperature.

Located in the central junction box . Fuse F1.13 10amp. CJB - under right side of dash .

F1.8 10 Electronic Automatic Temperature Control (EATC) module (19980), Exterior

rear view mirror, left, Exterior rear view mirror, right

F1.5 7.5 Powertrain Control Module (PCM) (12A650), Deactivator switch, Third row

folding seat relay, left, Third row folding seat relay, right, Power lift gate

module, Brake pedal position switch (13480), Sunload sensor (19E663),

Clock (15000), Function selector switch assembly, front, Electronic Automatic

Temperature Control (EATC) module (19980). Don't think you have a fuse problem ! More then likely the HVAC control module is bad , they do go bad
Don't

1) Front End Sensor - Right--Located under the front hood in the engine compartment (2) I/P Air Bag--Located at the top right under the instrument panel (3) Roof Rail Air Bag - Right--Located under the headliner, extending from the passenger front windshield pillar to the passenger rear windshield pillar (4) Side Impact Sensor (SIS) - RF--Located under the right front door trim near the lower rear of the door frame (5) Sensing and Diagnostic Module (SDM)--Located underneath the vehicle carpet under the center console (6) Seat Belt Pretensioner - RF--Located under the trim near the bottom of the center pillar (7) Side Impact Sensor (SIS) - RR--Located under the right rear door trim near the lower rear of the door frame (8) Roof Rail Module - Right--Located behind the garnish molding on the upper rear pillar (9) Roof Rail Module - Left--Located behind garnish molding on the upper rear pillar (10) Side Impact Sensor (SIS) - LR--Located under the left rear door trim near the lower rear of the door frame (11) Seat Belt Pretensioner - LF--Located under the trim near the bottom of the center pillar (12) Side Impact Sensor (SIS) - LF--Located under the left front door trim near the lower rear of the door frame (13) Roof Rail Air Bag - Left--Located under the headliner, extending from the driver front windshield pillar to the driver rear windshield pillar (14) Steering Wheel Air Bag--Located on the steering wheel (15) Vehicle Battery--Located at the front left of the engine compartment. (16) Front End Sensor - Left--Located under the front hood in the engine compartment

There is a cable that connects the handle to the latch, the cables like to break/stretch, sometimes if you look close at the rear of the seat where it attaches to the floor you can see the latch and manually release it with a long screw driver or similar tool.
Cables are avaiable from GM dealer if thats the problem.

camshaft sensor located above crankshaft pulley, the camshaft sensor mounted on the front timing cover above the crankshaft pulley.

If you take off your radiator cap (COLD ENGINE) and look inside with a flashlight count the number of rows, or tubes. Most are 2 rows. Generally, changing from a 1 to a 2 row, or visa verse will not have an impact on your vehicle, but with a large SUV I would say stay with a 2 row or higher.

{: ) There are many components in the airbag system of a vehicle and each one plays a distinct function in order to ensure a reliable protection, and timely deployments of the airbag in cases of extreme collisions.
You may be referring to the front and side impact sensors. These sensors are always on the front lines, meaning they usually are the first, the closest, and receives the most impact in collision situations.
The front impact sensors (left and right) are located on the front frame crossmember.
The right side impact sensor is located under the right front door trim near the lower rear of the door frame. The left side impact sensor is located under the left front door trim near the lower rear of the door frame.

There is an insurance liability issue of you make this modification, and have an accident. You might want to consider having a shop make this modification. Your insurance may be void with this modification.

Hello: Sir, There are a total of 5 (five) modules in the Inflatable restraint system, ( airbag) I will list them, their purpose and location:
Sensing & Diagnostic Module, the main module located under the rear of center console, Driver side inflator module located left side driver seat back . driver side inpact sensor located left lower side of center left pillar. steering wheel inflator module under the horn pad in the steering wheel. passenger front side inflator module located under righ side of upper instrument panel . Right front passenger side impact module right side of passenger seat lower back. Rf passenger side impact sensor. lower part of center pillar. The left and right sensors are not modules . Note, Codes B0051 and B0053 require replacement and programming with a scanner. Hope this helps you