SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 368 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSEXHAUST MANIFOLD REPLACEMENT - LEFT (3.8L)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable.
  2. Remove the fuel injector sight shield. Refer to FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L36) or FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L67) .
  3. Remove the engine mount struts. Refer to ENGINE MOUNT STRUT REPLACEMENT - RIGHT and ENGINE MOUNT STRUT REPLACEMENT - LEFT
  4. Remove the exhaust crossover pipe from the left exhaust manifold. Refer to Exhaust Crossover Pipe Replacement (3.1L)  or Exhaust Crossover Pipe Replacement (3.8L) 
  5. Disconnect the left spark plug wires.
  6. Remove the oil level indicator tube bracket. Refer to OIL LEVEL INDICATOR AND TUBE REPLACEMENT .
  7. Remove the left engine lift bracket bolt and nut.
  8. Remove the engine lift bracket.
    Fig 1: Engine Lift Bracket
    G01766049Courtesy of GENERAL MOTORS CORP.
  9. Remove the exhaust manifold heat shield nuts.
  10. Remove the exhaust manifold heat shield.
    Fig 2: Exhaust Manifold Heat Shield Nuts
    G01766050Courtesy of GENERAL MOTORS CORP.
  11. Remove the exhaust manifold bolts and the nuts.
  12. Remove the exhaust manifold.
  13. Remove the exhaust manifold gasket.
    14. Fig 3: Exhaust Manifold And Gasket
    G01766051Courtesy of GENERAL MOTORS CORP.
  14. Clean and inspect the exhaust manifold. Refer to EXHAUST MANIFOLD CLEANING AND INSPECTION .
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.