2008 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 KFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: Transmission Support & Frame Mounting Bolts
    GM851495Courtesy of GENERAL MOTORS CORP.
  1. Install the transmission support crossmember to the vehicle.
    2. NOTE: Refer to Fastener Notice .
  2. Install the transmission support crossmember to the frame mounting bolts.

    Tighten: 

    • Tighten the bolts to 50 N.m (37 lb ft), except Cutaway.
    • Tighten the bolts to 65 N.m (48 lb ft), Cutaway.

    3. Fig 2: View Of Transmission Mount & Transmission Support Retaining Nuts (4WD Vehicles)
    GM829718Courtesy of GENERAL MOTORS CORP.
  3. Install the transmission mount to the transmission support crossmember retaining nuts, for 4WD vehicles.

    Tighten:  Tighten the nuts to 60 N.m (44 lb ft).

    4. Fig 3: Transmission Mount & Transmission Support Retaining Nut (RWD Vehicles)
    GM829715Courtesy of GENERAL MOTORS CORP.
  4. Install the transmission mount to the transmission support crossmember retaining nut, for RWD vehicles.

    Tighten:  Tighten the nut to 60 N.m (44 lb ft).

    5. Fig 4: View Of Fuel Filter Bracket & Transmission Support Retaining Bolts
    GM829088Courtesy of GENERAL MOTORS CORP.
  5. Install the fuel filter bracket to transmission support crossmember retaining bolts.

    Tighten:  Tighten the bolts to 30 N.m (22 lb ft).

    6. Fig 5: View Of Brake Combination Valve & Transmission Support Mounting Bolt
    GM1199229Courtesy of GENERAL MOTORS CORP.
  6. Install the brake combination valve to transmission support crossmember mounting bolt.

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

  7. Remove the safety stands.
  8. Lower the vehicle.
Factory Service Tools

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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.

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