Heated seat not working right

2003 CHEVROLET SILVERADO

300,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC

GHOLLMAN

MEMBER
1 POST

Heated seat driver side has a mind of its own! Turns on, steps down, turns off then turns itself back on intermittently. Also cannot lock rear and passenger doors from drivers door.

Nov 4, 2018 at 11:22 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Hello,

It sounds like the seat memory module is going out which is common. Here is the module location and the seat heater wiring diagrams so you can see how it works.

If a new memory seat module was installed, the seat needs to synchronized:
Operate the seat in all directions:
Front tilt
Rear tilt
Horizontal
Recline
If the seat stops part way due to programmed soft stop, release the switch and operate again in the same direction tilt the seat touches the mechanical stop.
Repeat the above for all seat positions.

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Nov 5, 2018 at 3:56 PM