Workshop Repair and Service Manuals GMC SIERRA
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Transmission Transaxle

1-3 Clutch Housing Overhaul Automatic      Table 1: 1-3 Clutch Housing Overhaul Table 2: 1–3 Piston Removal Table 3: 1–3 Piston Installation Table 4: 1–3 Clutch Plate Installation 1-3 Clutch Housing Overhaul Callout Component Name 1...
1-3 Clutch Housing Sun Gear Carrier and Sun Gear Installation Automatic      1-3 Clutch Housing, Sun Gear Carrier, and Sun Gear Installation Callout Component Name 1 Hybrid Direct, 2–3–4 Clutch HousingThrust Bearing Assembly 2 1-3 Clutch Housing Assembly ProcedureAlign the internal...
2-4 Band 3-4 Clutch Housing and Reverse Input Clutch Housing Assembly Removal Automatic Transmission Unit Trans Bands Brakes      Remove the band anchor pin-(41). Remove the input housing and shaft assembly-(621),along with the reverse input clutch housing and drumassembly-(605). Remove the 2-4 band assembly (602).
2-4 Band Installation Automatic Transmission Unit Trans Bands Brakes      Inspect the 2-4 band assembly (602) for damage orwear.Install the 2-4 band (602) into the case. Install the band anchor pin-(41) into thecase.Index the band to fit the band anchor pin into theband.
2-4 Band Servo 2nd Apply Piston Assembly Disassemble Automatic Transmission Unit Trans Band Servos      Special Tools J-22269-01Accumulator and Servo Piston Remover Use aJ-22269-01piston removerto compress the second apply piston assembly (17).Remove the second apply piston retaining ring (14).Remove the servo cushion...
2-4 Band Servo 2nd Apply Piston Assembly Installation Automatic Transmission Unit Trans Band Servos      Special ToolsJ-22269-01Accumulator and Servo Piston RemoverJ-29714-AServo Cover Depressor Inspect the 4th apply piston-(25), the2-4-servo cover-(28), the 2nd applypiston-(17), and the servo piston innerhousing-(20) for the...
2-4 Band Servo 2nd Apply Piston Assembly Removal Automatic Transmission Unit Trans Band Servos      Special Tools J-29714-AServo Cover Depressor For equivalent regional tools, refer toSpecial Tools. Install theJ-29714-Adepressor. Note:If cover does not move inwards with tool, use a block of woodor suitable material...
2-4 Band Servo Piston Pin Length Check Automatic Transmission Unit Trans Band Servos      Special Tools J-330372-4 Intermediate Band Apply Pin Gauge Disassemble the 2–4 servo assembly. Remove theapply pin retaining ring-(24), the servo apply pinwasher-(23), the servo apply pin spring-(22)and the 2nd apply...
2-4 Band Servo Piston Pin Length Check Automatic Transmission Unit Trans Band Servos      Special Tools J-330372-4 Intermediate Band Apply Pin Gauge Install the band apply pin-(13) and theJ-33037pin gauge.Install the servo cover retaining ring-(29) tosecure the tool. Apply 11-Y(98-lb-in) torque. If the...
2-4 Band Servo Piston Pin Selection Automatic Transmission Unit Trans Band Servos      2-4 Servo Pin Selection Pin Length Pin Identification mm inch 65.82–66.12 2.59–2.60 1 Groove 67.23–67.53 2.65–2.66 2 Grooves 68.64–68.94 2.70–2.71 No Groove
2-4 Servo Automatic Transmission Unit Trans Band Servos      Special Tools J 29714-A Servo Cover Depressor Removal Procedure Remove the catalytic converter pipe. Refer toCatalytic Converter Replacement.Remove the heat shield bolts.Remove the heat shield.Support the...
2-4 Servo Passages Automatic      2-4 Servo Fluid Passages (#7) 3rd Accumulator Retainer and BallAssembly (40) (#7) 3rd Accumulator Retainer and BallAssembly (40) (11) Case Servo Orificed Plug (11) Case Servo Orificed Plug (25) 2nd Clutch...
2-6 Clutch Backing Plate Inspection Automatic      Note:Perform the following measurements at 3 or morelocations. Measure the thickness of the 2–6 clutch backingplate at dimension A. Specification The 2–6 clutch backing plate minimum thickness is11.10-mm (0.4370-in).Measure...
2-6 Clutch Overhaul Automatic      Table 1: 2–6 Clutch Plates Removal Table 2: 2–6 Clutch Piston Replacement Table 3: 2–6 Clutch Plates Installation 2–6 Clutch Plates Removal 2–6 Clutch Plates Removal Callout Component Name 1 2–6...
2-6 Clutch Piston Removal Automatic      Important:The preferred method of dislodging the 2–6 clutchpiston is with compressed air. If compressed air is not available,remove the 2–6 clutch piston assembly using pliers. Ifcompressed air is used, note the following....
2-6 Clutch Plate Inspection Automatic      Note: Perform the following measurements at 3 or morelocations.Check the plates for coning on a level surface.Replace any parts not meeting specifications.Measure the thickness of each 2–6 clutch fiberplate-(1) at...
2WD Output Housing Extension Assembly - Rear Case Assembly Side Automatic      2WD Output Housing ExtensionAssembly-–-Rear Case AssemblySide (39) Seal Drainback
3-4 Accumulator Installation Automatic      Inspect the 3-4 accumulator piston (44) for the followingconditions:PorosityCracksScoringNicks and scratchesInstall the 3-4 accumulator piston oil seal ring (45) on the3-4 accumulator piston (44). Install the 3-4...
3-4 Clutch Housing with Input Shaft Inspection Automatic Transmission Unit Automatic Clutches      Inspect the input housing and shaft assembly for thefollowing conditions:PorositySpline wear-–-internal andexternalInput speed sensor models, rotor teeth for cracks ordamageThree turbine shaft ball check valves are present...
3-4 Clutch Plate Assemble Automatic Transmission Unit Automatic Clutches      Note:The part 654A may have 5, 6 or 7 plates. Inspect the 3rd and 4th clutch apply plate (653), the fiberplate assemblies (654A), the steel plates (654B) and the selectivebacking plate (655) for the following...
3-4 Clutch Plate Travel Check Automatic Transmission Unit Automatic Clutches      Use feeler gauges to check the 3rd and 4th clutch platetravel.Check the travel between the selective backing plate (655)and the first fiber plate assembly (654A). The 3rd and 4th clutch plate travel should be: Five...
3-5 Reverse Clutch Backing Plate Retaining Ring Measurement (6L80 6L90) Automatic Transmission Unit Automatic Clutches      3-5 Reverse Clutch Backing Plate Retaining Ring Measurement Callout Component Name Preliminary ProceduresInstall the 1–2–3–4 and 3–5 reverse clutch housing with the 1–2–3–4 and 3–5 reverseclutch plates installed, onto...
3-5-Reverse Clutch Piston Removal Automatic Transmission Unit Automatic Clutches      Important:The preferred method of dislodging the 3rd, 5th, and reverseclutch piston is with compressed air. Use a 9.5-mm(3/8-in) rubber hose on the air connection to reach intothe 3rd, 5th, and reverse clutch annulus port....
3rd 5th and Reverse Clutch Plate Inspection Automatic Transmission Unit Automatic Clutches      Note:Make the following measurements at 3 or more locations.Replace any parts not meeting specifications. Measure the thickness of each 3rd, 5th, and reverse clutchfiber plate-(1) at dimension A. Specification The 3rd, 5th,...