2004 Chevrolet S10 PickupFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connectors

Powertrain Control Module (PCM) Connector C1

GM53524Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191110
  • 80-Way F Micro-Pack 100 Series (BLU)
Pin Wire Color Circuit No. Function
1 BLK/WHT 351 Ground
2 LT GRN 1867 12 Volt Reference
3 - - Not Used
4 LT BLU/BLK 844 Fuel Injector 4 Control
5-7 - - Not Used
8 GRY 2701 5 Volt Reference
9 DK BLU 496 Knock Sensor Signal
10-11 - - Not Used
12 YEL 573 CKP Sensor Signal
13-16 - - Not Used
17 DK BLU 1225 Transmission Fluid Pressure Switch Signal B (M30 only)
18 RED 1226 Transmission Fluid Pressure Switch Signal C (M30 only)
19 PNK 439 Ignition 1 Voltage
20 ORN 440 Battery Positive Voltage
21 PPL 574 Low Reference
22 - - Not Used
23 BLK 470 Low Reference
24 BLK/WHT 451 Ground
25 - - Not Used
26 TAN 1667 H02S Low Signal (Bank 2 Sensor 1)
27 BLK/WHT 451 Ground
28 TAN/WHT 1669 HO2S Low Signal (Bank 1 Sensor 2)
29 TAN/WHT 1664 HO2S Low Signal (Bank 1 Sensor 1)
30-31 - - Not Used
32 BLK/WHT 771 Transmission Range Switch Signal A (M30 Only)
33 PPL 420 TCC Brake Switch/Cruise Control Release Signal
34 WHT 776 Transmission Range Switch Signal P (M30 Only)
35 BRN/WHT 379 CPP Switch Signal
36 BLK 1744 Fuel Injector 1 Control
37 PNK/BLK 1746 Fuel Injector 3 Control
38-39 - - Not Used
40 BLK/WHT 351 Ground
41-42 - - Not Used
43 BLK/WHT 845 Fuel Injector 5 Control
44-45 - - Not Used
46 GRY 474 5 Volt Reference
47 - - Not Used
48 GRY 2704 5 Volt Reference
49 GRY 1716 Low Reference
50-52 - - Not Used
53 BLK 2762 Low Reference (M30 Only)
54 ORN 469 Low Reference
55-56 - - Not Used
57 ORN 440 Battery Positive Voltage
58 DK GRN 1049 PCM Class 2 Serial Data
59 YEL 710 Class 2 Serial Data
60 BLK 2752 Low Reference
61 PNK/BLK 632 Low Reference
62-63 - - Not Used
64 BLK/WHT 451 Ground
65 - - Not Used
66 PPL 1666 H02S High Signal
67 - - Not Used
68 PPL/WHT 1668 H02S High Signal
69 PPL/WHT 1665 H02S High Signal
70-71 - - Not Used
72 YEL 772 Transmission Range Switch Signal B (M30 only)
73 BRN/WHT 633 CMP Sensor Signal
74 YEL 410 ECT Sensor Signal
75 PNK 1020 OFF/RUN/CRANK Voltage (M30 only)
76 LT GRN/BLK 1745 Fuel Injector 2 Control
77 YEL/BLK 846 Fuel Injector 6 Control
78 - - Not Used
79 WHT 687 3-2 Shift Solenoid Valve Control (M30 Only)
80 BLK 2761 Low Reference
Powertrain Control Module (PCM) Connector C2

GM53524Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191110
  • 80-Way F Micro-Pack 100 Series (RED)
Pin Wire Color Circuit No. Function
1 BLK/WHT 351 Ground
2 BRN 418 TCC PWM Solenoid Valve Control (M30 Only)
3-5 - - Not Used
6 RED/BLK 1228 PC Solenoid Valve High Control (Solenoid A)- M30 only
7 - - Not Used
8 BLU/WHT 1229 PC Solenoid Valve Low Control (Solenoid A)- M30 only
9 DK GRN/WHT 465 Fuel Pump Relay Control
10 WHT 121 Engine Speed Signal
11-12 - - Not Used
13 LT BLU 396 Cruise Control Engaged Signal
14 - - Not Used
15 RED 225 Generator Turn On Signal
16 GRY/BLK 1694 4WD Low Signal
17 DK GRN/WHT 762 A/C Request Signal
18 - - Not Used
19 BLK/WHT 1695 Axle Switch Signal
20 LT GRN/BLK 822 VSS Low Signal
21 PPL/WHT 821 VSS High Signal
22-23 - - Not Used
24 DK BLU 417 TP Sensor Signal
25 TAN 472 IAT Sensor Signal
26 WHT 423 IC Timing Control
27-30 - - 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 351 Ground
41 - - Not Used
42 TAN/BLK 422 TCC Solenoid Valve Control (M30 Only)
43 DK GRN/WHT 459 A/C Clutch Relay Control
44 - - Not Used
45 WHT 1310 EVAP Canister Vent Solenoid Control
46 BRN/WHT 419 MIL Control
47 YEL/BLK 1223 2-3 Shift Solenoid Valve Control (M30 Only)
48 LT GRN 1222 1-2 Shift Solenoid Valve Control (M30 Only)
49 YEL/BLK 1827 Vehicle Speed Signal
50 DK GRN/WHT 817 Vehicle Speed Signal
51 YEL/BLK 1227 TFT Sensor Signal (M30 Only)
52 BRN 2391 HO2S Heater Low Control (Bank 1 Sensor 2)
53 - - Not Used
54 PPL 1589 Fuel Level Sensor Signal
55 DK GRN 603 A/C Low Pressure Switch Signal
56 - - Not Used
57 BLK 2760 Low Reference
58-61 - - Not Used
62 GRY 773 Transmission Range Switch Signal C (M30 Only)
63 PNK 1224 Transmission Fluid Pressure Switch Signal A (M30 Only)
64 DK GRN 890 Fuel Tank Pressure Sensor Signal
65-71 - - Not Used
72 BLK 3113 HO2S Heater Low Control (Bank 1 Sensor 1)
73 - - Not Used
74 LT GRN 3212 HO2S Heater Low Control (Bank 2 Sensor 1)
75 GRY 23 Generator Field Duty Cycle Signal
76 LT GRN/WHT 1749 IAC Coil B High Control
77 LT GRN/BLK 444 IAC Coil B Low Control
78 LT BLU/BLK 1748 IAC Coil A Low Control
79 LT BLU/WHT 1747 IAC Coil A High Control
80 - - Not Used
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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