Hummer H2. Manual - part 85

Example: The customer desires improved ride and/or handling, but the vehicle's shocks or struts have not failed. 
In this case, replacement may be suggested to satisfy the customer's wishes. In this case, replacement of the 
shocks or struts may not be sold as a requirement.  

A customer, of course, has the choice of whether or not a shop will service his or her vehicle. He or she may 
decide not to follow some of your suggestions. When a repair is required , a MAP shop must refuse partial 
service on that system if, in the judgment of the service provider, proceeding with the work could create or 
continue an unsafe condition. When a procedure states that required or suggested repair or replacement is 
recommended, the customer must be informed of the generally acceptable repair/replacement options 
whether or not performed by the shop. 

When presenting suggested repairs to the customer, you must present the facts, allowing the customer to draw 
their own conclusions and make an informed decision about how to proceed.  

The following reasons may be used for required and suggested services. These codes are shown in the "Code" 
column of the MAP Uniform Inspection & Communications Standards that follow:  

Reasons to Require Repair or Replacement 

A - Part no longer performs intended purpose  

B - Part does not meet a design specification (regardless of performance)  

C - Part is missing  

Reasons to Suggest Repair or Replacement 

1 - Part is close to the end of its useful life (just above discard specifications, or weak; failure likely to 
occur soon, etc.)  

2 - To address a customer need, convenience, or request (to stiffen ride, enhance performance, eliminate 
noise, etc.)  

3 - To comply with maintenance recommended by the vehicle's Original Equipment Manufacturer (OEM) 

4 - Technician's recommendation based on substantial and informed experience  

NOTE:

When a repair is required , the shop must refuse partial service to the system in 
question, if the repair creates or continues an unsafe condition. 

NOTE:

IMPORTANT -When a procedure states that a required or suggested repair or 
replacement is recommended, the basis for the recommendation MUST be 
explained to the customer. If the customer asks whether there are alternatives 
to the recommendation, generally acceptable repair/replacement options must 
be explained, whether performed or not by the shop.

NOTE:

Suggested services are always optional. When presenting suggested repairs to 
the customer, you must present the facts, allowing the customer to draw their 
own conclusions and make an informed decision about how to proceed. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

DRIVE/POWER TRAIN ASSEMBLIES 

AUTOMATIC TRANSMISSION/TRANSAXLE ASSEMBLIES 

Automatic Transmission/Transaxle Assemblies 

DIFFERENTIAL AND FINAL DRIVE ASSEMBLIES 

Differential and Final Drive Assemblies 

MANUAL TRANSMISSION/TRANSAXLE ASSEMBLIES 

Manual Transmission/Transaxle Assemblies 

TRANSFER CASE ASSEMBLIES

NOTE:

Whenever transmission or drivetrain service is performed that affects the 
suspension alignment, for example, removing the engine cradle, it is required 
that the alignment be checked and corrected if necessary. 

Condition 

Code 

Procedure 

Any internal component failure that 
requires removal of the assembly from 
the vehicle for service. See note below. 

A 

Require repair or replacement of the 

automatic transmission/transaxle 

assembly. See note below. 

NOTE: It is Required that the torque converter and all other failure-related components 
be inspected for cause and condition. 

NOTE: For components not requiring removal of the assembly, refer to the component 
listing in this document. 

NOTE:

Does not include half shafts. 

Condition 

Code 

Procedure 

Any internal component failure that requires 
removal of the assembly from the vehicle for 
service. See note below. 

A 

Require repair or replacement 

of the differential assembly. 

NOTE: For components not requiring removal of the assembly, refer to the component 
listing in this document. 

Condition 

Code 

Procedure 

Any internal component failure that 
requires removal of the assembly from the 
vehicle for service. See note below. 

A 

Require repair or replacement of the 

manual transmission/transaxle 

assembly. 

NOTE: For components not requiring removal of the assembly, refer to the component 
listing in this document. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

Transfer Case Assemblies 

DRIVE/POWER TRAIN COMPONENTS 

The conditions listed for the components included in this section assume that the problem has been isolated to 
the specific component through proper testing.  

ACTUATORS (ELECTRICAL) 

Actuators (Electrical) 

Condition 

Code 

Procedure 

Any internal component failure that requires 
removal of the assembly from the vehicle for 
service. See note below. 

A 

Require repair or replacement of 

the transfer case differential 

assembly. 

NOTE: For components not requiring remoaval of the assembly, refer to the component 
listing in this document. 

Condition 

Code 

Procedure 

Attaching hardware broken 

A 

Require repair or replacement of 

hardware. 

Attaching hardware missing 

C 

Require replacement of hardware. 

Attaching hardware not functioning 

A 

Require repair or replacement of 

hardware. 

Connector broken 

A 

Require repair or replacement. 

Connector (Weatherpack type) leaking 

A 

Require repair or replacement. 

Connector melted, affecting 
performance 

A 

Require repair or replacement. See note 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Connector melted, not affecting 
performance 

2 

Suggest repair or replacement. See note 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Connector missing 

C 

Require replacement. 

Inoperative 

A 

Require replacement. See note below. 

NOTE: Inoperative includes intermittent operation or out of OEM specification. 

Missing 

C 

Require replacement. 

Noisy 

2 

Suggest repair or replacement. 

Out of adjustment 

B 

Require repair or replacement. 

Terminal broken 

A 

Require repair or replacement. 

Terminal burned, affecting performance 

A 

Require repair or replacement. See note 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Terminal burned, not affecting 

1 

Suggest repair or replacement. See note 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

  

ACTUATORS (VACUUM) 

Actuators (Vacuum) 

performance 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Terminal corroded, affecting 
performance 

A 

Require repair or replacement. 

Terminal corroded, not affecting 
performance 

1 

Suggest repair or replacement. 

Terminal loose, affecting performance 

B 

Require repair or replacement. 

Terminal loose, not affecting 
performance 

1 

Suggest repair or replacement. 

Condition 

Code 

Procedure 

Attaching hardware broken 

A 

Require repair or replacement of 

hardware. 

Attaching hardware missing 

C 

Require replacement of hardware. 

Attaching hardware not functioning 

A 

Require repair or replacement of 

hardware. 

Connector broken 

A 

Require repair or replacement. 

Connector (Weatherpack type) leaking 

A 

Require repair or replacement. 

Connector melted, affecting 
performance 

A 

Require repair or replacement. See note 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Connector melted, not affecting 
performance 

2 

Suggest repair or replacement. See note 

below. 

NOTE: Determine cause and correct prior to repair or replacement of part. 

Connector missing 

C 

Require replacement. 

Inoperative 

A 

Require replacement. See note below. 

NOTE: Inoperative includes intermittent operation or out of OEM specification. 

Leaking (vacuum) 

A 

Require repair or replacement. 

Linkage bent, affecting performance 

A 

Require repair or replacement of linkage. 

Linkage bent, not affecting performance 

2 

Suggest repair or replacement of linkage. 

Linkage binding, affecting performance 

A 

Require repair or replacement of linkage. 

Linkage binding, not affecting 
performance 

1 

Suggest repair or replacement of linkage. 

Linkage broken 

A 

Require repair or replacement of linkage. 

Linkage loose, affecting performance 

A 

Require repair or replacement of linkage. 

Linkage loose, not affecting 
performance 

1 

Suggest repair or replacement of linkage. 

Linkage missing 

C 

Require replacement. 

 

1998 Chevrolet Pickup C1500 

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION