1976 Buick Skyhawk Base, Automatic TransFACTORY OEM SERVICE PROCEDURE

Compressor Output

  1. With ignition and all accessories off, deflate system through service valve on compressor. Remove high pressure line at regulator adapter and connect a suitable test gauge (see Figure). Inflate reservoir to 70 psi through service valve and watch test gauge for evidence of leak.
  2. If compressor leaks, remove from vehicle and perform LEAK TEST . If compressor is not leaking proceed as follows: Operate engine at slow idle and observe reservoir pressure buildup for five minutes. Reservoir pressure should build to a minimum of 100 psi (Cadillac) or 90 psi (Buick and Pontiac).
  3. If compressor does not cycle, ensure all lines are open and connected correctly before removing compressor. If pressure buildup is too slow and no restrictions are present in lines, compressor is faulty. If buildup is satisfactory, trouble is in control system.
Factory Service Tools

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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.

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