GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Body and Accessories 🢒 Seats 🢒 Power Seat Does Not Tilt Forward

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Seats System Check?

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Go to Step 2

Go to Power Seats System Check

2
  1. Ensure that the motor connector is connected.
  2. Using a J 39200 digital multimeter (DMM), backprobe the seat front height motor connector terminal A to ground.
  3. Operate the power seat adjuster switch to the FRONT UP position.

Is voltage present?

--

Go to Step 3

Go to Step 5

3
  1. Ensure that the motor connector remains connected.
  2. Using the J 39200 DMM, backprobe the seat front height motor connector terminal B to ground.
  3. Operate the power seat adjuster switch to the FRONT DOWN position.

Is voltage present?

--

Go to Step 4

Go to Step 6

4

Replace the seat front height motor.

Is the repair complete?

--

Go to Power Seats System Check

--

5
  1. Access the power seat adjuster switch.
  2. Using the J 39200 DMM, backprobe the C1 terminal F to ground.
  3. Operate the power seat adjuster switch to the FRONT UP position.

Is voltage present?

--

Go to Step 7

Go to Step 9

6
  1. Access the power seat adjuster switch.
  2. Using the J 39200 DMM, backprobe the terminal G to ground.
  3. Operate the power seat adjuster switch to the FRONT DOWN position.

Is voltage present?

--

Go to Step 8

Go to Step 9

7

Locate and repair the open or high resistance in CKT 286 (LH) or CKT 297 (RH) between the power seat adjuster switch and the seat front height motor.

Is the repair complete?

--

Go to Power Seats System Check

--

8

Locate and repair the open or high resistance in CKT 287 (LH) or CKT 298 (RH) between the power seat adjuster switch and the seat front height motor.

Is the repair complete?

--

Go to Power Seats System Check

--

9

Replace the power seat adjuster switch.

Is the repair complete?

--

Go to Power Seats System Check

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