GM Repair Problems? Ask GM Repair Expert Now.
Can you run the following tests? You will need a multimeter.
Check for the relay in the Memory Seat Module (MSM) to click when the heated seat button is pressed.If it does, disconnect the MSM.Test the resistance of the seat heater elements from the MSM connector. They should all be 1.5-5.5 ohms.If ok, have an assistant sit in the seat and retest.Check each circuit for continuity to the seat frame. There should be no continuity- your meter should read ol when set to ohms.
Here is a diagram of the heated seat. The module is #3 and 4.
Here are the two connector maps you will need for #3 and 4.
You will check from pin 1 of connector 3 to pin 2 of connector 4 for resitance between 1.5-5.5 ohms. Then also from pin 11 to 13 of pin 4 for resistance.
I'm sorry C3 pin 1 to C4 pin 14 (not pin 2).
And C4 pin 2 to C4 pin 11. I was looking at the diagram wrong.
Next C3 14 to C4 12 for resistance. It should be 1.5-5.5 ohms.
And C4 22 to C4 1- also 1.5-5.5 ohms. These two are the seat back heaters.
I just wanted to check whether you still need help with this.
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