GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1534963  Size: SH
  1. Rotate the crankshaft until number 4 piston is at top dead center (TDC) on the compression stroke. Refer to the crankshaft damper-to-front-cover timing marks.
  2. Install a NEW camshaft position sensor housing seal.

  3. Object Number: 1534965  Size: SH
  4. Align the timing mark on the housing with the timing mark on the hex shaft.

  5. Object Number: 1534962  Size: SH
  6. Install the camshaft position sensor housing.
  7. Notice: Refer to Fastener Notice in the Preface section.

  8. Install the camshaft position sensor housing studs.
  9. Tighten
    Tighten the camshaft position sensor housing studs to 22 N·m (16 lb ft).