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Home >> Cadillac >> 2004 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.8L, 5.3L & 6.0L (Introduction) >> Component Locator >> Powertrain Control Module (PCM) Connectors
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Powertrain Control Module (PCM) Connectors

Powertrain Control Module (PCM) C1

GM655733Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191489
  • 80-Way F Micro-Pack 100 Series (BLU)
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 LT GRN 1867 12-Volt Reference
3 PNK/BLK 1746 Fuel Injector 3 Control
4 LT GRN/BLK 1745 Fuel Injector 2 Control
5-6 - - Not Used
7 GRY 2705 5-Volt Reference
8-10 - - Not Used
11 LT BLU 1876 Knock Sensor 2 Signal
12 DK BLU/
WHT		 1869 CKP Sensor Signal
13 ORN/BLK 463 Requested Torque Signal (NW7)
14 ORN/BLK 1061 UART Serial Data
15 DK BLU/
WHT		 774 UART Serial Data
16 - - Not Used
17 DK BLU 1225 Transmission Fluid Pressure Switch Signal B (A/T)
18 RED 1226 Transmission Fluid Pressure Switch Signal C (A/T)
19 PNK 439 Ignition 1 Voltage
20 ORN 440 Battery Positive Voltage
21 YEL/BLK 1868 Low Reference
22 - - Not Used
23 BLK 470 Low Reference
24 BLK/WHT 451 Ground
25 TAN 1671 HO2S Low Signal - Bank 2 Sensor 2
26 TAN 1667 HO2S Low Signal - Bank 2 Sensor 1
27 BLK/WHT 451 Ground
28 TAN/WHT 1669 HO2S Low Signal - Bank 1 Sensor 2
29 TAN 1664 HO2S Low Signal - Bank 1 Sensor 1
30 LT GRN 1478 Coolant Level Switch Signal
31 - - Not Used
32 BLK/WHT 771 Transmission Range Switch Signal A (A/T)
33 PPL 420 TCC Brake Switch/Cruise Control Release Switch Signal
34 WHT 776 Transmission Range Switch Signal P (A/T)
35 GRY 48 CPP Switch Signal (M/T)
36 BLK 1744 Fuel Injector 1 Control
37 YEL/BLK 846 Fuel Injector 6 Control
38 PNK/WHT 1101 Damping Lift/Dive Signal
39 YEL/BLK 625 Starter Enable Relay Control
40 BLK/WHT 451 Ground
41-42 - - Not Used
43 RED/BLK 877 Fuel Injector 7 Control
44 LT BLU/BLK 844 Fuel Injector 4 Control
45 GRY 2700 5-Volt Reference (A/C)
46 GRY 474 5-Volt Reference (EVA)
47 - - Not Used
48 GRY 597 5-Volt Reference
49-50 - - Not Used
51 DK BLU 496 Knock Sensor 1 Signal
52 - - Not Used
53 GRY 720 Low Reference (A/T)
54 ORN/BLK 469 Low Reference
55 - - Not Used
56 WHT 1579 Fuel Temperature/Composition Signal (L59)
57 ORN 440 Battery Positive Voltage
58 DK GRN 1049 Class 2 Serial Data
59 YEL 710 Class 2 Serial Data
60 - - Not Used
61 PNK/BLK 632 Low Reference
62 - - Not Used
63 BLK 2755 Low Reference
64 BLK/WHT 451 Ground
65 PPL 1670 HO2S High Signal - Bank 2 Sensor 2
66 PPL 1666 HO2S High Signal - Bank 2 Sensor 1
67 BLK/WHT 451 Ground
68 PPL/WHT 1668 HO2S High Signal - Bank 1 Sensor 2
69 PPL/WHT 1665 HO2S High Signal - Bank 1 Sensor 1
70 BRN 1174 Oil Level Switch Signal
71 - - Not Used
72 YEL 772 Transmission Range Switch Signal B (A/T)
73 BRN/WHT 633 CMP Sensor Signal
74 YEL 410 ECT Sensor Signal
75 PNK 1020 Off/Run/Crank Voltage
76 BLK/WHT 845 Fuel Injector 5 Control
77 DK BLU/
WHT		 878 Fuel Injector 8 Control
78 - - Not Used
79 WHT 687 3-2 Shift Solenoid Valve Control (M30/M32)
80 BLK 407 Low Reference
Powertrain Control Module (PCM) C2

GM684875Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191488
  • 80-Way F Micro-Pack 100 Series (GRN)
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 BRN 418 TCC PWM Solenoid Valve Control (A/T)
3 TAN 1465 Fuel Pump Relay Control - Secondary (Dual Tanks)
4 - - Not Used
5 TAN/BLK 464 Delivered Torque Signal (NW7)
6 RED/BLK 1228 PC Solenoid Valve High Control (A/T)
7 - - Not Used
8 LT BLU/WHT 1229 PC Solenoid Valve Low Control (A/T)
9 DK GRN/
WHT		 465 Fuel Pump Relay Control - Primary
10 WHT 121 Engine Speed Signal
11-13 - - Not Used
14 RED/BLK 380 A/C Refrigerant Pressure Sensor Signal (A/C)
15 BRN 25 Charge Indicator Control
16-17 - - Not Used
18 DK GRN 1433 Clutch Start Switch Signal (M/T)
19 BLK/WHT 1695 Axle Switch Signal (NP2)
20 LT GRN/BLK 822 VSS Low Signal
21 PPL/WHT 821 VSS High Signal
22 RED/BLK 1230 AT ISS High Signal (4WD w/MT1)
23 DK BLU/
WHT		 1231 AT ISS Low Signal (4WD w/MT1)
24 - - Not Used
25 TAN 472 IAT Sensor Signal
26 PPL 2121 IC 1 Control
27 RED 2127 IC 7 Control
28 LT BLU/WHT 2126 IC 6 Control
29 DK GRN/
WHT		 2124 IC 4 Control
30 - - Not Used
31 YEL 492 MAF Sensor Signal
32 LT GRN 432 MAP Sensor Signal
33 - - Not Used
34 DK GRN/
WHT		 428 EVAP Canister Purge Solenoid Control
35-38 - - Not Used
39 RED 631 12-Volt Reference
40 BLK/WHT 451 Ground
41 - - Not Used
42 TAN/BLK 422 TCC Solenoid Valve Control (M30/M32)
43 DK GRN/
WHT		 459 A/C Compressor Clutch Relay Control (A/C)
44 - - Not Used
45 WHT 1310 EVAP Canister Vent Solenoid Control (EVA)
46 BRN/WHT 419 MIL Control
47 YEL/BLK 1223 2-3 Shift Solenoid Valve Control (A/T)
48 LT GRN 1222 1-2 Shift Solenoid Valve Control (A/T)
49 YEL/BLK 1827 Vehicle Speed Signal
50 DK GRN/
WHT		 817 Vehicle Speed Signal
51 YEL/BLK 1227 TFT Sensor Signal (A/T)
52 BRN 2391 HO2S Heater Low Control Bank 1 Sensor 2
53 RED/WHT 3223 HO2S Heater Low Control Bank 2 Sensor 2
54 PPL/WHT 1589 Fuel Level Sensor Signal - Primary
55-56 - - Not Used
57 BLK 552 Low Reference
58 TAN/WHT 332 Oil Pressure Sensor Signal
59 PPL 806 Crank Voltage
60 BRN 2129 Low Reference
61 BRN/WHT 2130 Low Reference
62 GRY 773 Transmission Range Switch Signal C (A/T)
63 PNK 1224 Transmission Fluid Pressure Switch Signal A (A/T)
64 DK GRN 890 Fuel Tank Pressure Sensor Signal (EVA)
65 - - Not Used
66 PPL/WHT 2128 IC 8 Control
67 RED/WHT 2122 IC 2 Control
68 DK GRN 2125 IC 5 Control
69 LT BLU 2123 IC 3 Control
70-71 - - Not Used
72 BLK/WHT 3113 HO2S Heater Low Control Bank 1 Sensor 1
73 DK BLU 1936 Fuel Level Sensor Signal - Secondary
74 LT GRN 3212 HO2S Heater Low Control Bank 2 Sensor 1
75 GRY 23 Generator Field Duty Cycle Signal
76-79 - - Not Used
80 BLK 2751 Low Reference (A/C)
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