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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 41 (ENGINE CONTROLS - 4.3L - COMPONENT LOCATOR)COMPONENT LOCATORPOWERTRAIN CONTROL MODULE CONNECTOR END VIEWSPOWERTRAIN CONTROL MODULE (PCM) - C2
2001 Chevrolet Suburban C1500

Powertrain Control Module (PCM) - C2

2001 Chevrolet Suburban C1500SECTION Powertrain Control Module (PCM) - C2
WARNING: This page is about a different car, the 2001 GMC Sierra and 2001 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Control Module (PCM) - C2

GM684875
Connector Part Information
  • 12191488
  • 80-Way F Micro-Pack 100W Sealed (NAT)
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 BRN 418 TCC PWM Solenoid Valve Control
3-5 - - Not Used
6 RED/BLK 1228 PC Solenoid Valve High Control (Sol. A)
7 RED 1676 EGR Valve Supply Voltage
8 LT BLU/WHT 1229 PC Solenoid Valve Low Control (Sol. A)
9 DK GRN/WHT 465 Fuel Pump Relay Control [- Primary]
10 WHT 121 Engine Speed Signal
11 DK BLU 604 A/C High Pressure Recirculation Switch Signal
12 - - Not Used
13 LT BLU/BLK 396 Cruise Control Engaged Signal
14 - - Not Used
15 BRN 25 Charge Indicator Control
16 GRY/BLK 1694 4WD Low Signal
17 DK GRN/WHT 2523 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 DK GRN 1614 Recirculation Door Control
34 DK GRN/WHT 428 EVAP Canister Purge Solenoid Control
35 - - Not Used
36 BRN 436 AIR Pump Relay Control
37-38 - - Not Used
39 RED 631 12 Volt Reference
40 BLK/WHT 451 Ground
41 WHT 257 EGR Solenoid Control
42 TAN/BLK 422 TCC Solenoid Valve Control
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 or Shift Solenoid B) Valve Control
48 LT GRN 1222 (1-2 Shift Solenoid or Shift Solenoid A) Valve Control
49 YEL/BLK 1827 Vehicle Speed Signal
50 DK GRN/WHT 817 Vehicle Speed Signal
51 YEL/BLK 1227 TFT Sensor Signal
52 GRY 23 Generator Field Duty Cycle Signal
53 - - Not Used
54 PPL 1589 Fuel Level Sensor Signal [- Primary]
55 DK GRN 603 A/C Low Pressure Switch Signal
56 - - Not Used
57 BLK 552 Low Reference
58 61 - - Not Used
62 GRY 773 Transmission Range Switch Signal C
63 PNK 1224 Transmission Fluid Pressure Switch Signal A
64 DK GRN 890 Fuel Tank Pressure Sensor Signal
65-75 - - Not Used
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
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • 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.