1987 Chevrolet Hi-Cube 6.2 J, 400/M40FACTORY OEM SERVICE PROCEDURE

"SET" Mode

With vehicle speed at or above 25 MPH (cruise control switch in "ON" position), depress and release set/coast switch. Vehicle speed will then be set at speed vehicle was traveling when "SET" button was released. Vehicle cruise speed should be within one MPH of vehicle speed when "SET" button was released. Speed will be maintained until cruise control switch is turned to "OFF" position, ignition is turned to "OFF" position or set/coast switch is fully depressed and held. Depressing brake or clutch pedal (M/T) releases vehicle speed, but will not shut system off. See Figure .

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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