SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 588 (AUTOMATIC TRANSAXLE - 4T65-E (INTRODUCTION, SERVICE & REPLACEMENT))REPAIR INSTRUCTIONSREVERSE SERVO REPLACEMENT (LY7)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 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the powertrain (engine, transmission and frame) from the vehicle. Refer to Engine Replacement in Engine Mechanical - 3.6L (LY7).
  2. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement (LA1) or Exhaust Crossover Pipe Replacement (LY7) in Engine Exhaust.
    3. Fig 1: Removing/Installing Reverse Servo Cover Snap Ring
    GM48166Courtesy of GENERAL MOTORS CORP.
  3. Use a large flat-bladed tool in order to depress the reverse servo cover (40).
  4. Use a small flat-bladed tool in order to remove the retaining ring (39).
    5. Fig 2: O-Ring Seal
    GM48171Courtesy of GENERAL MOTORS CORP.
  5. Use a small flat-bladed tool in order to pull the O-ring seal (41) out through the slot in the case.
  6. Use side cutting pliers in order to cut the servo cover O-ring seal (41).
  7. Use a large flat-bladed tool in order to depress the reverse servo cover (40), grasp one end of the cut seal (41) and pull the seal (41) out of the servo cover (40).
    8. Fig 3: Identifying Reverse Servo Assembly Components
    GM48173Courtesy of GENERAL MOTORS CORP.
  8. Remove the reverse servo cover (40).
  9. Remove the servo assembly (42-48).
  10. Remove the servo spring (49).
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.