GM Service Manual Online
For 1990-2009 cars only
Table 1: Electronic Power Steering (EPS) Control Module C1
Table 2: Electronic Power Steering (EPS) Control Module C2
Table 3: Electronic Power Steering Control Module (PSCM) C3

Electronic Power Steering (EPS) Control Module C1


Object Number: 823283  Size: CH

Connector Part Information

    • OEM: 10721337
    • Service: See Catalog
    •  2-Way F 375 58 (BK)

Pin

Wire Color

Circuit No.

Function

1

RD/BK

642

Battery Positive Voltage

2

BK

1150

Ground

Electronic Power Steering (EPS) Control Module C2


Object Number: 1413003  Size: CH

Connector Part Information

    • OEM: 15438391
    • Service: See Catalog
    •  6-Way F 040 (GY)

Pin

Wire Color

Circuit No.

Function

1

TN/BK

2500

High Speed GMLAN Serial Data (+) (1)

2

TN

2501

High Speed GMLAN Serial Data (-) (1)

3

--

--

Not Used

4

BN/WH

2500

High Speed GMLAN Serial Data (+) (1)

5

BN

2501

High Speed GMLAN Serial Data (-) (1)

6

PK

1539

Run/Crank Ignition 1 Voltage

Electronic Power Steering Control Module (PSCM) C3


Object Number: 823278  Size: CH

Connector Part Information

    • 7123-4123-30
    • 2-Way F (BU)

Pin

Wire Color

Circuit No.

Function

+

RD

5

Motor Control

-

BK

5

Motor Control