Overhaul Information

1983 GMC Pickup C1500, 6.2 C, StandardSECTION Overhaul Information
NOTE: The DA-6 compressor can be overhauled in the field, if proper fixtures, tools and gauges are used. Center cylinder and piston assembly is non-serviceable, and must be replaced as a single unit. Shaft seal and drive components (clutch, pulley, clutch coil) can be overhauled without disturbing the compressor's internal parts. Instructions for such service are at the end of this article.

Most major overhaul procedures require that the system be discharged and that the compressor be removed from the vehicle for bench repair. Special metric tools are required for the compressor.

Take every precaution to keep dirt or other contaminants out of compressor. Be sure work bench area is clean.

When overhauling compressor, drain oil, measure the amount removed, and discard it. Oil leaking from compressor during reassembly, should also be caught, measured, and discarded. When repairs are completed, new refrigerant oil should be added equal to measured amount.

RENDER: 1.0x

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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.