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Automatic Transmission - Removal & Installation: Application Chevrolet TrailBlazer I

Automatic Trans 11 illustrations ~574 words

APPLICATION

ApplicationTransmission Model (RPO Code)
Bravada, Envoy, Envoy XL, TrailBlazer4L60-E (M30)

TRANSMISSION APPLICATION

WARNINGVehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system-related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. If necessary, deactivate SIR system before servicing components. See appropriate AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.
CAUTIONWhen battery is disconnected, vehicle computer may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

Note. Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Scheme 5

Scheme 5: Removal (4.2L)
Scheme 5: Removal (4.2L)

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9
Scheme 9

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15
  1. Disconnect the battery.
  2. Remove the filler tube nut (2) located on the right side of the engine. (Scheme 5)
  3. Raise the vehicle.
  4. Drain the transmission fluid if necessary. See appropriate SERVICING article as follows: For 2002 models, see SERVICING - BRAVADA, ENVOY & TRAILBLAZER article. For 2003 models, see «SERVICING - BRAVADA, ENVOY & TRAILBLAZER»(ref-154782) article.
  5. Remove the rear driveshaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
  6. Support the transmission with a transmission jack.
  7. Remove the nuts securing the transmission mount to the transmission support. (Scheme 6)
  8. Remove the evaporative emission (EVAP) canister from its mounting bracket on the left inside of the frame to gain access to the transmission support bolts. Do not disconnect the canister lines.
  9. Remove the fuel tank shield.
  10. Remove the transmission support from the vehicle. (Scheme 7)
  11. Remove the transmission mount bolts (1 and 2). (Scheme 8)
  12. Remove the transmission mount from the vehicle. (Scheme 9)
  13. Remove the front exhaust pipe assembly.
  14. Lower the transmission to gain access to the top and sides of the transmission.
  15. Remove the transfer case, if equipped. See appropriate REMOVAL & INSTALLATION article.
  16. Remove the range selector cable end from the transmission range selector lever ball stud (6) and the bracket (1). (Scheme 10)
  17. Remove the transmission heat shield. (Scheme 11)
  18. Disconnect the transmission vent hose, the Park/Neutral Position (PNP) switch connector, and the main electrical connector from the transmission. See PARK/NEUTRAL POSITION SWITCH under REMOVAL & INSTALLATION in appropriate SERVICING article as follows: For 2002 models, see SERVICING - BRAVADA, ENVOY & TRAILBLAZER article. For 2003 models, see «SERVICING - BRAVADA, ENVOY & TRAILBLAZER»(ref-154782) article.
  19. Remove the bolt that secures the fuel line bracket to the left side of the transmission.
  20. Remove the torque converter access plug. (Scheme 12)
  21. Mark the flywheel and torque converter orientation for reassembly.
  22. Remove the flywheel-to-torque converter bolts. Use care not to drop the bolts into the bell housing.
  23. Disconnect the transmission oil cooler lines from the transmission. See OIL COOLER HOSE/PIPE under REMOVAL & INSTALLATION in appropriate SERVICING article as follows: For 2002 models, see SERVICING - BRAVADA, ENVOY & TRAILBLAZER article. For 2003 models, see «SERVICING - BRAVADA, ENVOY & TRAILBLAZER»(ref-154782) article.
  24. Plug the transmission oil cooler line connectors in the transmission case.
  25. Install a safety chain around the transmission.
  26. Remove the bolt that secures the fuel line bracket-to-bell housing. (Scheme 13)
  27. Remove the bolts (1 and 2) that secure the coolant pipe to the bell housing. (Scheme 14)
  28. Remove the remaining nuts, studs and/or bolts that secure the transmission to the engine. (Scheme 15)
  29. Install the Converter Holding Strap (J-21366) onto the transmission bell housing to retain the torque converter.
  30. Pull the transmission straight back.
  31. Remove the transmission from the vehicle.

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