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 MANUALSGMC1986SUBURBAN C2500, 5.7 M, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)MAINTENANCEPROCEDURESMAINTENANCE INFORMATIONCAUTIONS & WARNINGSREAR WHEEL ANTI-LOCK BRAKE SYSTEM
1986 GMC Suburban C2500, 5.7 M, Standard
Rear Wheel Anti-Lock Brake System
1986 GMC Suburban C2500, 5.7 M, StandardSECTION Rear Wheel Anti-Lock Brake System
NOTE:
On models equipped with anti-lock brake systems, ALWAYS observe the following cautions:
- DO NOT attempt to bleed hydraulic system without first referring to appropriate ANTI-LOCK BRAKE SYSTEM article in the BRAKES Section.
- DO NOT mix tire sizes. As long as tires remain close to the original diameter, increasing the width is acceptable. Rolling diameter must be identical for all 4 tires. Some manufacturers recommend tires of the same brand, style and type. Failure to follow this precaution may cause inaccurate wheel speed readings.
- Use ONLY recommended brake fluids. DO NOT use silicone brake fluids in an ABS-equipped vehicle.
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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.