Reference Information
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
Repair Instructions
Perform the DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
Perform the DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
Circuit/System Verification
Verify DTC C0550 is not current.
- If DTC C0550 is current, replace the CCM.
Perform the DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
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 - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
Perform the DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.
Schematic Reference: ALL-WHEEL DRIVE SCHEMATICS
Connector End View Reference: TRANSFER CASE CONTROL CONNECTOR END VIEWS
Description and Operation: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Description and Operation Reference: ALL-WHEEL DRIVE DESCRIPTION AND OPERATION
Electrical Information Reference
- «CIRCUIT TESTING»(ref-268410-S02883852162007102300000)
- «CONNECTOR REPAIRS»(ref-268413-S16594189052007102300000)
- «TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS»(ref-268410-S06240382452007102300000)
- «WIRING REPAIRS»(ref-268410-S19177984692007102300000)
Perform the DIAGNOSTIC REPAIR VERIFICATION - VEHICLE DIAGNOSTIC INFORMATION after completing the diagnostic procedure.
CONTROL MODULE REFERENCES for CCM replacement, setup, and programming
Noisy in Drive
| Cause | Correction |
|---|---|
| Inspect for proper gear oil levels prior to performing system diagnosis. | |
| Loose propeller shaft mounting bolts | Tighten the bolts as required. Refer to FASTENER TIGHTENING SPECIFICATIONS - PROPELLER SHAFT . |
| Worn propeller shaft constant velocity joint | Replace the propeller shaft assembly. Refer to PROPELLER SHAFT REPLACEMENT . A worn propeller shaft constant velocity joint may create a clicking, grinding, or snapping type noise. |
| Worn or loose center bearing assembly | Replace the center bearing assembly as required. A worn center bearing may cause vehicle vibration or a grinding, squealing type of noise. Refer to PROPELLER SHAFT REPLACEMENT . |
| Worn universal joints | Replace the universal joints as required. A worn universal joint may create a clicking or snapping type of noise. Refer to PROPELLER SHAFT REPLACEMENT . |
| Worn axle shaft constant velocity joints | Replace/repair the constant velocity joints as required. A worn axle shaft constant velocity joint may create a clicking, grinding, or snapping type of noise. Refer to SYMPTOMS - REAR DRIVE AXLE . |
| Transfer case noise | Refer to DIAGNOSTIC STARTING POINT - TRANSFER CASE . |
| Worn or damaged axle mounting bushings (side) | Replace bushings as required. A worn bushing may create a clunk type of noise during acceleration or deceleration. Refer to DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (FRONT) and DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (REAR) . |
| Worn or damaged axle mounting bushing (rear) | Replace bushings as required. A worn bushing may create a clunk type of noise during acceleration or deceleration. Check bushing orientation; the tuning slots must be in proper position. |
| Loose rear mounting bracket | Tighten the bracket bolts as required. Refer to FASTENER TIGHTENING SPECIFICATIONS - REAR DRIVE AXLE . |
| Loose or damaged prop guard | Repair or replace as required. A loose dust shield may contact the propeller shaft assembly and create a scraping or grinding type of noise. |
| Bearing noise within axle assembly | A grinding roar type of noise will increase or decrease relative to the vehicle speed. Check for proper fluid level. Refer to REAR AXLE LUBRICANT REPLACEMENT . If the noise continues, repair or replace the unit as required. |
| Gear set whine noise within axle assembly | A whine type of noise will increase or decrease relative to the vehicle speed, approximately 80-90 km/h (50-56 mph). Check for the proper fluid level. Refer to REAR AXLE LUBRICANT REPLACEMENT . Repair or replace the unit as required. |
| Shutter or moan at slow speeds or slow turns | A shutter or moan type of noise in slow sharp turns. RDM could be contaminated with the wrong fluid type/water. Replace the fluid; fill as required and retest under conditions. Refer to REAR AXLE LUBRICANT REPLACEMENT . Replace the drum. |
NOISY IN DRIVE CAUSE
Noisy When Coasting
| Cause | Correction |
|---|---|
| Inspect for proper gear oil levels prior to performing system diagnosis. | |
| Loose propeller shaft mounting bolts | Tighten the bolts as required. Refer to FASTENER TIGHTENING SPECIFICATIONS - PROPELLER SHAFT . |
| Worn propeller shaft constant velocity joint. | Replace the propeller shaft assembly. Refer to PROPELLER SHAFT REPLACEMENT . A worn propeller shaft constant velocity joint may create a clicking, grinding, or snapping type of noise. |
| Worn or loose center bearing assembly | Replace the center bearing assembly as required. A worn center bearing assembly may cause vehicle vibration or a grinding or squealing type of noise. |
| Worn universal joints | Replace the universal joints as required. A worn universal joint may create a clicking or a snapping type of noise. Refer to PROPELLER SHAFT REPLACEMENT . |
| Worn axle shaft constant velocity joints. | Replace or repair the constant velocity joints as required. A worn axle shaft constant velocity joint may create a clicking, grinding, or snapping type of noise. Refer to SYMPTOMS - REAR DRIVE AXLE . |
| Transfer case noise | Refer to SYMPTOMS - TRANSFER CASE . |
| Worn or damaged axle mounting bushings (Side) | Check the bushing position and replace the bushings as required. A worn bushing may create a clunk type of noise during acceleration or deceleration or wrong orientation. Refer to DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (FRONT) and DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (REAR) . |
| Worn or damaged axle mounting bushings (Rear) | Replace the bushings as required. A worn bushing may create a clunk type of noise during acceleration or deceleration. Refer to DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (FRONT) and DIFFERENTIAL HOUSING SUPPORT BUSHING REPLACEMENT (REAR) . |
| Loose rear mounting bracket | Tighten the bracket bolts as required. Refer to FASTENER TIGHTENING SPECIFICATIONS - REAR DRIVE AXLE . |
| Loose or damaged prop guard | Repair or replace as required. A loose dust shield may contact the propeller shaft assembly and create a scraping or grinding type of noise. |
| Bearing noise within axle assembly | A grinding or roar type of noise will increase or decrease relative to vehicle speed. Check for the proper fluid level. Refer to REAR AXLE LUBRICANT REPLACEMENT . If the noise continues, repair or replace the unit as required. |
| Gear set whine noise within axle assembly created by incorrect gear backlash | A whine type of noise will increase or decrease relative to vehicle speed. Check for the proper fluid level. Refer to REAR AXLE LUBRICANT REPLACEMENT . Repair or replace the unit as required. |
NOISY WHEN COASTING CAUSE
Noisy on Turns
| Cause | Correction |
|---|---|
| Inspect for proper gear oil levels prior to performing system diagnosis. Operate the vehicle turning in tight circles, in both left and right directions. Moan, groan, chatter, or a pulsing type concern may indicate a pump or clutch park problem within the axle assembly. | |
| Worn or loose rear axle mounts | Repair or replace as required. |
| Worn axle shaft constant velocity joints | Replace the constant velocity joints as required. |
| Worn wheel bearings | Replace the wheel bearings as required. |
| Incorrect gear oil | Replace with gear oil, GM P/N 12378514 (Canadian P/N 88901045). Refer to REAR AXLE LUBRICANT REPLACEMENT . |
| Worn differential side and/or idler gears and worn cross-pin | Replace gears and pin as required. |
| Worn clutch plates | Replace clutch drum. |
NOISY ON TURNS CAUSE
Sealers, Adhesives, and Lubricants
| Application | Type of Material | GM Part Number |
|---|---|---|
| Differential Lubricant | Synthetic Gear Oil 75W-90 | 89021677 (Canadian P/N 89021678 |
| Propeller Shaft Mounting Bolts | Threadlocker | 89021297 (Canadian P/N 10953488) |
GM PART NUMBER TABLE