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General Motors — Service Procedure

A General Motors service procedure — check it applies to your exact model before use.

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Procedure

  1. Measure valve spring free length, installed height and pressure (tension). Replace valve
  2. Measure installed height between cylinder head spring seat (or top of shim, if

Source: manual:1995 ENGINE 4.3L VIN W_text.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.