Park/Neutral (P/N) Switch

1991 GMC C3500 HD 6.2 J, Standard, NV4500/MT8SECTION Park/Neutral (P/N) Switch

Disconnect P/N switch (located on transmission) harness connector. Connect ohmmeter between the P/N switch terminals. See Fig 1. Continuity should be present only when gear shift selector is in Park or Neutral. If continuity is not present, check P/N switch adjustment or replace defective P/N switch.

Fig 1: Typical P/N Switch Circuit
G90B15736Courtesy of GENERAL MOTORS CORP.
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