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 PROCEDURESSYMPTOMS - SEATSNOTES
1999 GMC Forward Control 5.7 R, Automatic
Symptoms - Seats: Notes
1999 GMC Forward Control 5.7 R, AutomaticSECTION Notes
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.
IMPORTANT:
The following steps must be completed before using the symptom tables.
- When diagnosing a memory seat system condition perform the Diagnostic System Check - Power Seat Systems before using the symptom tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control module(s) can communicate via the serial data link.
- Refer to the system description and operation from the following list in order to familiarize yourself with the system functions:
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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.