Cruise Set Speed High Or Low

1987 Chevrolet Suburban R20, 7.4 N, 400/M40SECTION Cruise Set Speed High Or Low

Check vacuum hose routing for pinches, leaks or restrictions. Check servo linkage for excess slack and adjust as described in this article. Check control module part number to ensure that correct module is in place. Replace control module, if no system problem is found.

RENDER: 1.0x

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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.