Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Chevrolet Avalanche 2WD V8-5.3LFACTORY OEM SERVICE PROCEDURE
Memory Seat Module (MSM) (AN3)
Passenger Compartment/Roof Component Views
Driver Seat Components (2 of 2)
1 - Driver Seat Cushion
2 - Driver Seat Back Cushion
3 - Heated Seat Element - Driver Back (AN3 or KA1)
4 - Heated Seat Element - Driver Cushion (AN3 or KA1)
5 - Seat Recline Motor - Driver (AN3)
6 - Seat Recline Postion Sensor - Driver (AN3)
7 - Seat Lumbar Switch - Driver (AN3)
8 - Seat Adjuster Switch - Driver
9 - Memory Seat Module (MSM) (AN3)
10 - Inflatable Restraint Seat Position Sensor - Driver
11 - Seat Adjuster Motor Assembly - Driver (except HP2)
12 - Inflatable Restraint Seat Belt Tension Sensor - Driver
13 - Seat Belt Switch - Driver
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.