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 MANUALSCHEVROLET1987FORWARD CONTROL 4.8 T, AUTOMATIC, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - DIESELSPECIFICATIONSALTERNATORS

1987 Chevrolet Forward Control 4.8 T, Automatic, 400/M40

Tune-Up - Diesel: Specifications: Alternators

1987 Chevrolet Forward Control 4.8 T, Automatic, 400/M40SECTION Alternators

On 6.2L, alternator supplies current to both batteries. There are no switches or relays in charging circuit.

ALTERNATOR SPECIFICATIONS

Application	Field Current Draw @ 12 Volts	Rated Amp Output
"C" & "K" Series	4.5-5.0	66
"G" Series	4.5-5.0	78
"P" Series	N/A	120

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.