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 MANUALSGMC1984PICKUP K2500, 5.7 M, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 18 (SERVICING - M/T)LUBRICATIONRECOMMENDED FLUIDTRANSMISSION
1984 GMC Pickup K2500, 5.7 M, Standard
Recommended Fluid: Transmission
1984 GMC Pickup K2500, 5.7 M, StandardSECTION Transmission
WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 1991 Oldsmobile Bravada, 1991 GMC Vandura, 1991 GMC Value Van, 1991 GMC Sonoma, and 1991 GMC S15 Jimmy. However, it is still accessible from the selected car via links, so may be relevant.
The 77mm 5-speed and 4500 5-speed use Dexron-II ATF. The 117mm 4-speed uses API GL5 SAE 80W90 gear lubricant. Manufacturer recommends using Manual Transmission Fluid (1052931) in 85mm 5-speed.
RENDER: 1.0x
NO RELATED
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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.