Drive Motor Generator Control Module (PIM) Part Restriction (PIT4539M)

WARNING: This page is about the Escalade Hybrid, 4WD, which is a different variant/trim than selected.

Publication date: 2011-08-31
Reference number: PIT4539M

DRIVE MOTOR GENERATOR CONTROL MODULE (PIM) PART RESTRICTION

TECHNICAL INFORMATION TIPS

Reference Number(s): PIT4539M, Date of Issue: August 31, 2011

MODELS

2009-2012 Cadillac Escalade
2009-2012 Chevrolet Silverado
2008-2012 Chevrolet Tahoe
2009-2012 GMC Sierra
2008-2012 GMC Yukon

This PI was superseded to update recommended field. Please discard PIT4539L

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

CONDITION/CONCERN

As part of our ongoing quality improvement process, effective November 12th, 2008 the (Drive Motor Generator Control Module, also known as PIM) for the 2-Mode Hybrid Utilities and Trucks is being placed on restriction through the GM TAC (Technical Assistance Center).

Parts on restriction are:

2008-2009 Full Size Trucks And Utilities PIM Part Number is: 12633548
2010-2012 Full Size Trucks And Utilities PIM Part Number is: 12636016

NOTE: If the part is being ordered for a non warrantable concern (i.e. collision, theft, fire..etc) proceed directly to step 5 below (Valid VIN and proof of ownership required).

RECOMMENDATION/INSTRUCTIONS

Please have a Trained 2Mode hybrid technician follow the procedures below prior to contacting TAC.
NOTE: Do NOT erase DTC's in any of the modules! (Especially on intermittent concerns.)
Please complete the customer questionnaire at the bottom of this document with as much information as possible and as accurately as possible so that it can be e-mailed to TAC.
Check and record all diagnostic codes in all modules on the vehicle. The DTC's should be checked by using the following path in the Tech 2. Build make and model and select hybrid / vehicle control system / select engine size / vehicle DTC information / DTC display
Be sure to record what module the DTC came from and any symptom codes associated with the DTCs (see latest version of bulletin 07-07-30-010A for snapshot information).
If DTC's are set in any of the modules below, please save the captured data for later use. Access the module that has the DTC's listed and use the following path to locate the captured data: Diagnostic Trouble Codes/Additional DTC
- Information/Store Information/ Refresh Capture Information
- Accessory Power Module
- Battery Energy Control Module
- Engine Control Module
- Fuel Pump Control Module
- Hybrid Control Module
- Motor Control Module 1 & 2
- Transmission Control Module
Once the above information has been obtained, please review all P.I and TSB information and all available S.I. diagnostics
If diagnostics lead to PIM replacement, contact TAC @ 877-446-8227 (U.S.) or in Canada 1-800-263-7740 (English) or 1-800-263-7960 (French) to review case details. Please have as much stored DTC and snapshot information as possible prior to contacting TAC.
After reviewing the diagnosis, if component replacement is needed, TAC will arrange for ordering of the new component.

NOTE: If the PIM will be replaced dealer tech will be required to order a new seal kit GM P/N: 19168315. The seal kit contains a seal that goes between the APM and the PIM to properly seal the APM to the PIM. This seal kit needs to be ordered by the dealer and is not a restricted part.

Driving Condition Customer Questionnaire

Please have the customer answer as many questions below and as accurately as possible.

What was the weather like during the event? (Circle) Sunny Rain Snow Overcast

What was the temperature outside at the time of the event?

Below 0F-32F (-17C-0C)32-60F (0C-15C) Above 60F (15C) Exact if possible_______

Were there any sounds at the time of concern? Y/N If yes what type?

Were there any odors at the time of concern? Y/N

If yes what type and from what area of the vehicle?

What were the driving conditions during the concern?

Highway

City

Combination

Estimate driving distance from starting point until the concern occurred. Mileage___ Kilometers ___ AND Had the vehicle been driven from a cold start or had the vehicle already been driven and warm when the concern occurred.

Does the vehicle get driven extensively in EV (electric) mode?

If so, do you shut the vehicle off right away or do you get it back up to higher speeds before shutting it off again?

What type of event was this?

Shutdown while driving No crank from initial Start No restart from Autostop

If the event is a shutdown Please answer the following questions.

Was the engine running when the event occurred?

What type of road were you driving on when the event happened? (Circle one) Paved Gravel Mud Other_______

Were you accelerating or decelerating at the time? How aggressive was this?

How long has it been since the vehicle was previously started? (Circle one) <1 hour 2-5 hours 5-8 hours >8 hours.

Approximately what temperature was the vehicle stored at prior to this drive cycle? (Circle one) Below 0F-32F (-17C-0C)32-60F (0C-15C) Above 60F (15C) Exact if possible_______

What gear were you in when the event occurred? (Circle one) Park Reverse Neutral Drive Manual Shifting

How fast were you going when the event occurred? (Circle one) Stopped 0-10 mph (0-16kph) 10-30mph (16-48kph) 30-50mph (48-80kph) above 50mph (80kph)

If the event is a no crank What % of driving is highway? What % of driving is city?

Does the vehicle sit for extended periods of time? If so, record number of days.

How often is the vehicle driven in EV (electric) mode?

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.