Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- «Differential Clutch Drum Assembly Replacement»(ref-365263-S03473370902010070600000)
- «Control Module References»(ref-365276-S01454229382010070600000) for CCM replacement, setup, and programming
Reference Information
Schematic Reference
All-Wheel Drive Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
All-Wheel Drive Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-365275-S00040570812010070600000)
- «Connector Repairs»(ref-365275-S19060558252010070600000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-365275-S00287822652010070600000)
- «Wiring Repairs»(ref-365275-S21384576672010070600000)
Scan Tool Reference
Control Module References for scan tool information
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- «Differential Clutch Drum Assembly Replacement»(ref-365263-S03473370902010070600000)
- «Control Module References»(ref-365276-S01454229382010070600000) for rear differential clutch control module replacement, setup, and programming
Schematic Reference
All-Wheel Drive Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
All-Wheel Drive Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-365275-S00040570812010070600000)
- «Connector Repairs»(ref-365275-S19060558252010070600000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-365275-S00287822652010070600000)
- «Wiring Repairs»(ref-365275-S21384576672010070600000)
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify DTC C0550 is not current.
- If DTC C0550 is current, replace the CCM.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for CCM replacement, setup, and programming
Schematic Reference
All-Wheel Drive Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
All-Wheel Drive Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-365275-S00040570812010070600000)
- «Connector Repairs»(ref-365275-S19060558252010070600000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-365275-S00287822652010070600000)
- «Wiring Repairs»(ref-365275-S21384576672010070600000)
Scan Tool Reference
Control Module References for scan tool information
Verify that DTC C0558 is not set.
- If the DTC is set, calibrate the CCM. If the DTC resets, replace the CCM.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for CCM replacement, setup, and programming
Schematic Reference
All-Wheel Drive Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
All-Wheel Drive Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-365275-S00040570812010070600000)
- «Connector Repairs»(ref-365275-S19060558252010070600000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-365275-S00287822652010070600000)
- «Wiring Repairs»(ref-365275-S21384576672010070600000)
Scan Tool Reference
Control Module References for scan tool information
Verify that no DTCs are set in the ECM or EBCM.
- If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-365273-S02566515352010070600000) .
Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.
Noisy in Drive
| Cause | Correction |
|---|---|
| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. Refer to Transfer Case Fluid Replacement . | |
| Water or contamination within the lubricant Water or contamination within the lubricant, causing excessive torque converter clutch slip rate, may create a grind, growl, or moan in the rear differential or torque tube under light or steady load conditions. | Replace the lubricant and flush the transfer case of the contaminated fluid. Refer to Transfer Case Fluid Replacement . |
| Loose propeller shaft mounting bolts | Tighten the bolts, as required. Refer to Propeller Shaft Replacement . |
| Worn propeller shaft constant velocity joints | Replace propeller shaft assembly. Refer to Propeller Shaft Replacement . |
| Worn axle shaft constant velocity joints | Replace the constant velocity joints, as required. |
| Loose rear axle torque tube bracket or a worn bracket bushing | Tighten the bracket bolts or replace the bracket, as required. |
| Worn bearing in the rear differential torque tube assembly | Replace the torque tube assembly. |
| Torque tube dampener loose or missing A moan or exhaust leak type noise at higher engine speeds, approximately 2,000-2,500 RPM, may indicate a loose or missing dampener. | Tighten the dampener retaining bolt or replace the torque tube assembly, as required. |
| Incorrect gear oil in the transfer case | Replace the gear oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . |
| Bearing noise within the transfer case A grinding or roar type noise will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. |
| Gear set whine noise within the transfer case Whine type noises will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. Contributing factors may include: Incorrect backlash between the gear sets Worn or damaged gear teeth Transaxle assembly noise Rear differential noise |
Noisy When Coasting
| Cause | Correction |
|---|---|
| Inspect for the proper transaxle and gear oil levels prior to performing system diagnosis. Refer to Transfer Case Fluid Replacement . | |
| Loose propeller shaft mounting bolts | Tighten the bolts, as required. Refer to Propeller Shaft Replacement . |
| Worn propeller shaft constant velocity joints | Replace the propeller shaft assembly. Refer to Propeller Shaft Replacement . |
| Worn axle shaft constant velocity joints | Replace the constant velocity joints, as required. |
| Loose rear differential torque tube bracket or a damaged bracket bushing | Tighten the bracket bolts or replace the bracket, as required. |
| Worn bearing in the rear axle torque tube assembly | Replace the torque tube assembly. |
| Incorrect gear oil in the transfer case | Replace the gear oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . |
| Bearing noise within the transfer case A grinding or roar type noise will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. |
| Gear set whine noise within the transfer case Whine type noises will increase or decrease relative to the vehicle speed. | Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the internal components, as required. Contributing factors may include: Incorrect backlash between the gear sets Worn or damaged gear teeth Transaxle assembly noise Rear differential noise |
2008 Mid-Model Intermediate Drive Shaft (IDS) Seal Update
The IDS seal design was updated in the mid-model year 2008 Getrag 760/790 Transfer Cases.
Replacing the IDS seal with the correct seal requires identification between first and second design transfer cases. Refer to the table below.
| Seal Design Usage | First Design | Second Design |
|---|---|---|
| Transfer Case P/N | 24244527 | 24246213 |
| Original IDS Seal P/N | 19132951 / 19178698 | 19206322 |
| Original Seal Color | Yellow or Blue | Green |
| Replacement Service Seal | 19180998 | 19206322 |
| Replacement Service Seal Color | Green | Green |
| VIN Breakpoint - 12/19/2007 | 1GKEV23788J217964 |
Scheme 29
First design, pre-breakpoint seals were built with IDS seals that have yellow or blue shaft guides and are replaced with unique, short neck seals (1) with a green shaft guide.
Second design, post-breakpoint seals were built with IDS seals that have green shaft guides (1) and are serviced with unique, long neck seals (2) with green shaft guides.
Seal Design
Second design IDS seals have sealing lips extended about 5 mm (0.20 in) from the first design sealing location.
Second design IDS seals are not compatible with first design transfer cases. Installing a second design seal in a first design transfer case will create a transmission fluid leak due to interference with the input shaft.
Scheme 30
Installing the replacement seal to the proper depth is critical. Use DT-48078 Inner Drive Shaft Seal installer with J 8092 Driver Handle to install the seal 2.8 mm (0.11 in) (a) from the end of the input shaft. Refer to Front Drive Axle Inner Shaft Seal Replacement .
Scheme 31
| Callout | Component Name |
|---|---|
| 1 | GM Part Number |
| 2 | Getrag Serial Number |