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Relay Block - I/P Bottom View

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Relay Block - I/P Bottom View
GM892417Courtesy of GENERAL MOTORS CORP.
Relay Block - I/P C1

GM365994Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12193905
  • 68-Way F Metri-Pack 280 Series Flexlock (GRY)
Pin Wire Color Circuit No. Function
A1 LT GRN 24 Backup Lamp Supply Voltage - BCM
LT GRN 24 Backup Lamp Supply Voltage - Junction Block - Rear
A2 DK BLU/WHT 149 Cargo Lamp Low Control - Cargo Switch
DK BLU/WHT 149 Cargo Lamp Low Control - BCM
A3 BLK/WHT 1704 Low Reference
A4 DK GRN/
WHT		 636 Ambient Air Temperature Sensor Signal
A5 BLK/WHT 1851 Ground - HVAC Module
BLK/WHT 1851 Ground - DLC
A6 WHT 193 Rear Defog Relay Control
A7 - - Not Used
A8 BRN/WHT 230 Instrument Panel Lamps Dimming Control
A9 YEL 1139 Ignition 1 Voltage
A10 DK GRN/WHT 817 Vehicle Speed Signal (SBA)
A11 BRN/WHT 230 Instrument Panel Lamps Dimming Control (NW7)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (NP8 or NP1)
A12 GRY/BLK 690 Courtesy Lamp Supply Voltage
B1 PNK 1045 Serial Communications Circuit
B2 ORN 3740 Battery Positive Voltage
B3 BLK/WHT 1851 Ground - Radio
BLK/WHT 1851 Ground - Fuse Block - I/P
B4 - - Not Used
B5 BLK/WHT 1851 Ground - C201
BLK/WHT 1851 Ground - C201
B6 ORN 1840 Battery Positive Voltage
B7 RED 642 Battery Positive Voltage
B8 BRN/WHT 230 Instrument Panel Lamps Dimming Control - Cargo Lamp
BRN/WHT 230 Instrument Panel Lamps Dimming Control (NYS)
B9 DK GRN/WHT 817 Vehicle Speed Signal
DK GRN/WHT 817 Vehicle Speed Signal (Y91)
B10 - - Not Used
B11 ORN 3240 Battery Positive Voltage
B12 - - Not Used
C1 ORN 340 Battery Positive Voltage
C2 BRN/WHT 230 Instrument Panel Lamps Dimming Control (AU3 w/o YE9)
C3 BRN/WHT 230 Instrument Panel Lamps Dimming Control (YE9)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (Export)
C4 - - Not Used
C5 BLK/WHT 1851 Ground
C8 BRN/WHT 230 Instrument Panel Lamps Dimming Control - Headlamp Switch
BRN/WHT 230 Instrument Panel Lamps Dimming Control - HVAC Module
C9 ORN 1340 Battery Positive Voltage
C10 BRN 2409 Interior Park Lamps Supply Voltage
C11-C12 - - Not Used
D1 WHT/BLK 5515 Inside Air Temperature Sensor Assembly Control (CJ2)
D2 BRN/WHT 230 Instrument Panel Lamps Dimming Control (T89)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (w/o YE9)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (C99)
D3 BRN/WHT 230 Instrument Panel Lamps Dimming Control (PTO)
BRN/WHT 230 Instrument Panel Lamps Dimming Control
D4 ORN 1732 Inadvertent Power Supply Voltage
D5 BLK/WHT 1851 Ground
D8 BLK/WHT 1851 Ground (Y91)
BLK/WHT 1851 Ground
D9 BLK 1050 Ground
D10 BRN 2409 Interior Park Lamps Supply Voltage (C99)
D11 - - Not Used
D12 ORN 2340 Battery Positive Voltage
E1 BRN 718 Low Reference (CJ2)
E2 PNK 1691 Automatic Day/Night Mirror Low Reference (DF5)
E3 - - Not Used
E4 PPL/WHT 1382 LED Dimming Signal (Export)
PPL/WHT 1382 LED Dimming Signal
E5 BLK/WHT 1851 Ground (Y91 w/UQ7)
BLK/WHT 1851 Ground (AU3 w/o YE9)
BLK/WHT 1851 Ground (LU3)
BLK/WHT 1851 Ground (HP2)
E6 DK GRN/WHT 817 Vehicle Speed Signal - I/P Cluster
DK GRN/WHT 817 Vehicle Speed Signal (NYS)
E7 PPL/WHT 1382 LED Dimming Signal - BCM
PPL/WHT 1382 LED Dimming Signal - Headlamp Dimmer Switch
E8 BLK/WHT 1851 Ground - BCM C2
BLK/WHT 1851 Ground - BCM C3
E9 - - Not Used
E10 RED 242 Battery Positive Voltage (w/o LU3)
E11-E12 - - Not Used
F1 DK GRN 734 Inside Air Temperature Sensor Signal (CJ2)
F2 GRY 1690 Automatic Day/Night Mirror Signal (DF5)
F3 PNK 739 Ignition 1 Voltage
F4 TAN/WHT 1384 Selective Ride Control Switch Signal (ZX3)
F5 BLK/WHT 1851 Ground (Y91 w/U2K/U2L)
BLK/WHT 1851 Ground (SBA)
BLK/WHT 1851 Ground (NP1/NP8)
F6 PPL/WHT 1382 LED Dimming Signal (T79)
PPL/WHT 1382 LED Dimming Signal (NYS)
F7 ORN 4540 Battery Positive Voltage
ORN 4540 Battery Positive Voltage (Export)
F8 BLK/WHT 1851 Ground (UE1/Y91)
BLK/WHT 1851 Ground (Export)
F9 LT BLU 1620 Trailer CHMSL Supply Voltage
F10 DK BLU 47 Trailer Auxiliary Supply Voltage
F11 YEL 243 Accessory Voltage
F12 - - Not Used
Relay Block - I/P C3

GM655838Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15328768
  • 12-Way F Metri-Pack 280 Series Flexlock (BRN)
Pin Wire Color Circuit No. Function
A LT GRN 24 Backup Lamp Supply Voltage (YE9)
B - - Not Used
C BLK 1050 Ground
D DK BLU/WHT 149 Cargo Lamp Low Control
E YEL 1139 Ignition 1 Voltage
F DK GRN 2308 Passenger Air Bag Off Indicator Control (AL0)
G BLK/WHT 1704 Low Reference (YE9)
H DK BLU 2307 Passenger Air Bag On Indicator Control (AL0)
J LT BLU 1620 CHMSL Supply Voltage
K DK GRN/WHT 636 Ambient Air Temperature Sensor Signal (YE9)
L GRY/BLK 690 Courtesy Lamp Supply Voltage
GRY/BLK 690 Courtesy Lamp Supply Voltage (w/ Crew Cab)
M ORN 1732 Inadvertent Power Supply Voltage
Relay Block - I/P C4

GM366003Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12193922
  • 6-Way F Metri-Pack 280 Series Flexlock (CRM)
Pin Wire Color Circuit No. Function
A - - Not Used
B PNK 1691 Automatic Day/Night Mirror Low Reference (DF5)
C GRY 1690 Automatic Day/Night Mirror Signal
D DK GRN 734 Inside Air Temperature Sensor Signal
E BRN 718 Low Reference
F WHT/BLK 5515 Inside Air Temperature Sensor Assembly Control
Relay Block - I/P C5

GM366015Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12193928
  • 6-Way F Metri-Pack 280 Series Flexlock (GRY)
Pin Wire Color Circuit No. Function
A - - Not Used
B PPL/WHT 1382 LED Dimming Signal (ZX3)
PPL/WHT 1382 LED Dimming Signal (5G4/5X7/5Y0/TRW)
C TAN/WHT 1384 Selective Ride Control Switch Signal (ZX3)
D PNK 739 Ignition 1 Voltage (ZX3)
E BLK 1050 Ground (ZX3)
F BRN/WHT 230 Instrument Panel Lamps Dimming Control (ZX3)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (5X7/5G4/TRW/5Y0)
Relay Block - I/P C7 (Z82 or T89)

GM886343Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12193924
  • 6-Way F Metri-Pack 280 Series Flexlock (BRN)
Pin Wire Color Circuit No. Function
A BRN 2409 Interior Park Lamps Supply Voltage (Z82 w/o T89)
B RED 242 Battery Positive Voltage (Z82 w/o T89)
C DK BLU 47 Trailer Auxiliary Supply Voltage (Z82 w/o T89)
D LT BLU 1620 Trailer CHMSL Supply Voltage (Z82 w/o T89)
E - - Not Used
F BLK 1050 Ground (Z82 w/o T89)
Relay Block - I/P C8 (5G4/5X7/5Y0/TRW)

GM366024Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12193930
  • 6-Way F Metri-Pack 280 Series (BLK)
Pin Wire Color Circuit No. Function
A ORN 2340 Battery Positive Voltage (5G4/TRW)
B-C - - Not Used
D YEL 243 Accessory Voltage (9L4)
E ORN 4540 Battery Positive Voltage (5G4/5X7/5Y0/TRW)
F BLK 1050 Ground (5X7/5Y0/5G4/TRW)
Relay Block - I/P C9

GM524807Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12194035
  • 12-Way F Metri-Pack 280 Series (BLK)
Pin Wire Color Circuit No. Function
A - - Not Used
B PNK 1045 Serial Communications Circuit
C - - Not Used
D ORN 3740 Battery Positive Voltage (UQ7 w/o Y91)
E ORN 340 Battery Positive Voltage (UQ7 w/o Y91)
ORN 340 Battery Positive Voltage (U2K/U2L w/o Y91)
F-G - - Not Used
H ORN 3240 Battery Positive Voltage (UE1 w/o Y91)
ORN 3240 Battery Positive Voltage (UE1 w/o Y91)
J ORN 3240 Battery Positive Voltage (U42 w/o Y91)
K BLK/WHT 1851 Ground (U42)
BLK/WHT 1851 Ground (UE1)
L BLK/WHT 1851 Ground (w/o Y91)
M BLK/WHT 1851 Ground (UQ7 w/o Y91)
BLK/WHT 1851 Ground (U2K/U2L)
Relay Block - I/P C10

GM831381Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15357030
  • 12-Way F Metri-Pack 280 Series Flex-Lock (NAT)
Pin Wire Color Circuit No. Function
A-C - - Not Used
D DK GRN 2308 Passenger Air Bag Off Indicator Control (AL0)
E ORN 1440 Battery Positive Voltage (AG2)
F BRN/WHT 230 Instrument Panel Lamps Dimming Control (YE9 and Crew Cab)
BRN/WHT 230 Instrument Panel Lamps Dimming Control (YE9 and Crew Cab w/o Y91)
G DK BLU 2307 Passenger Air Bag On Indicator Control (AL0)
H ORN 1440 Battery Positive Voltage (AG1)
J - - Not Used
K ORN 1340 Battery Positive Voltage (Crew Cab w/YE9)
L PPL 293 Rear Defog Element Supply Voltage (C49)
M YEL 1139 Ignition 1 Voltage (AL0)
YEL 1139 Ignition 1 Voltage (SIR SDM)
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