Bulletin No.: PIC6238C
Published date: N/A

Preliminary Information
PIC6238C TAC Part Restriction 2017-2019 Chevy Bolt (Cabin
Heater Control Module) CHCM
Models
Brand:
Chevrolet

Model:
Bolt

Model Years:
2017 - 2019

VIN:
from
All

Engine:

to
All

All

Transmissions:
All

Involved Region or
Country

North America

Condition

As part of our ongoing quality improvement process, effective
November 21st, 2016 the Cabin Heater Control Module (CHCM) is
being placed on restriction through the GM Technical Assistance
Center (TAC).

Cause

Ongoing review by Engineering and TAC

Correction:
1) Please have a certified Bolt EV technician follow the procedures below prior to contacting
TAC.
IMPORTANT Note: Do NOT erase DTC's in any of the modules (Especially on intermittent
concerns) and do NOT attempt to reprogram software!
2) Please complete the following information below with as much information as possible
and as accurately as possible so that it can be e-mailed to TAC.
3) Check and record all diagnostic codes in all modules on the vehicle.
4) Be sure to record what module the DTC came from and any symptom codes associated
with the DTCs (see latest version of bulletin 10-07-30-002A for snapshot information).
5) Once the above information has been obtained, please review all P.I and TSB information
and all available S.I. diagnostics.
6) If diagnostics lead to a Cabin Heater Control Module (CHCM) 42539734 replacement,
contact TAC @ 877-446-8227
(U.S.) or in Canada 1-800-263-7740
(English) or 1800-263-7960
(French) to review case details. Please have as much stored DTC and
snapshot information as possible prior to contacting TAC.
7) After reviewing the diagnosis, if component replacement is needed, TAC will arrange for
ordering of the new component and request that it be shipped overnight.
NOTE: After reviewing the diagnosis, if component replacement is needed, GM Goodwrench
TAC will arrange for ordering of the part(s). When this occurs, record the last 8 of VIN # to
be used by the parts department (in conjunction with the part #) as the CONTROL NUMBER
to track shipment of the part. It is not necessary to call TAC for part tracking information.

Parts Information
Description

Part Number

Quantity

Heater Coolant Heater (CHCM)

42597802, FSU: 42691833

1

Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following
labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage
information.

Labor Operation
4414090

Description
Heater Coolant Heater Replacement

Labor Time
Use published Labor
Times

Version History
Version

4

Modi ed

Created on 12/16/2016
3/16/2018 - Updated to add model years
10/22/2018 - Updated to add model years and part number.
12/04/2018 - Updated FSU part number

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