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Home >> Chevrolet >> 2007 >> Uplander Base, 3.9 1 >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Exhaust Crossover Pipe Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Identifying Exhaust Crossover Pipe
    GM1679429Courtesy of GENERAL MOTORS CORP.
  1. Install the exhaust crossover pipe seals to the exhaust manifolds.
  2. Install the exhaust crossover pipe (2).
    3. NOTE: Refer to Fastener Notice .
  3. Install the exhaust crossover pipe nuts (1).

    Tighten:  Tighten the nuts to 20 N.m (15 lb ft).

    4. Fig 2: Removing/Installing Exhaust Crossover Pipe Shield Bolts & Shield
    GM1679427Courtesy of GENERAL MOTORS CORP.
  4. Install the exhaust crossover heat shield (2).
  5. Install the exhaust crossover heat shield bolts (1).

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  6. Position the heater pipes back to the original position.
  7. Install the nuts holding the heater pipes on the throttle body.
  8. Connect the heater hoses onto the heater pipes.
  9. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
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