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.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 743 (SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESMEMORY SEAT FEATURE INOPERATIVE
1999 GMC Forward Control 5.7 R, Automatic
Memory Seat Feature Inoperative
1999 GMC Forward Control 5.7 R, AutomaticSECTION Memory Seat Feature Inoperative
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Memory Seat Feature Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Memory Seats Schematics DEFINITION: When the memory 1 or 2 select switches are pressed the seat does not return to the stored position settings. |
|||
| 1 | Did you perform the Power Seat Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Attempt to operate the memory seat recall functions. Do the memory seat recall functions operate properly? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 6 | Go to Step 4 |
| 4 |
|
Go to Step 8 | Go to Step 5 |
| 5 | Test the memory select switch signal circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 10 |
| 6 | Test the position sensor 5 volt reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 7 |
| 7 | Test the position sensor low reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 8 | Inspect for poor connections at the LH door switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 9 |
| 9 | Replace the LH door switch. Refer to Front Door Switch Replacement
in Doors. Is the repair complete? |
Go to Step 14 | - |
| 10 | Inspect for poor connections at the LH door control module. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 11 |
| 11 | Replace the LH door control module. Refer to Door Control Module Replacement
in Doors. Is the repair complete? |
Go to Step 14 | - |
| 12 | Inspect for poor connections at the memory seat module. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 13 | Replace the memory seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |
RENDER: 1.0x
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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.