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)QUICK LOOKUPSFLUIDS
1986 GMC Suburban C2500, 5.7 M, Standard
Quick Lookups: Fluids
1986 GMC Suburban C2500, 5.7 M, StandardSECTION Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Refrigerant | 3.00 LBS. | 1.36 KG | R-12 | S | |||
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | S | |||
| Engine Coolant | Eng VIN M | w/Air Cond | 18.00 QTS. | 17.03 L | 56/44 mixture of Ethylene Glycol Base Antifreeze and water | GM Specification 1825-M. | S |
| Engine Coolant | Eng VIN M | w/o Air Cond | 17.50 QTS. | 16.56 L | 56/44 mixture of Ethylene Glycol Base Antifreeze and water | GM Specification 1825-M. | S |
| Engine Oil | Eng VIN M | w/Filter | 5.00 QTS. | 4.73 L | SAE 10W-30 Energy Conserving Engine | S | |
| Engine Oil | Eng VIN M | w/o Filter | 4.00 QTS. | 3.78 L | SAE 10W-30 Energy Conserving Engine | S | |
| Fuel Tank | Gas | NE2 Option | 40.00 GALS. | 151.41 L | S | ||
| Fuel Tank | Gas | NK7 Option | 31.00 GALS. | 117.34 L | S | ||
| Fuel Tank | Gas | Standard | 25.00 GALS. | 94.63 L | S | ||
| Manual Transmission Fluid | 1.80 QTS. | 1.7 L | Automatic Transmission Fluid DEXRON II | S | |||
| Power Steering Fluid | N/A | N/A | GM Power Steering Fluid | GM Part No. 1050017. | S | ||
| Transfer Case Fluid | 5.00 QTS. | 4.73 L | Automatic Transmission Fluid DEXRON II | S | |||
| Windshield Washer Fluid | N/A | N/A | Optikleen Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. | S | ||
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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.