Not quite sure where to post this. I already posted a similar question at the LS1 forum in the conversion section. I just picked up a 2007 5.3 out of a Tahoe, for my 56 Chevy, and I plan to do the harness myself. Has someone mapped out the harness as far as what pin is what on the PCM?

 

Don't know if it helps, but painless makes a harness for LS1's. SDPC has them.

 

Thanks! Who is SDPC? The reason I want to make the harness myself is I want to hide all of them, if possible.

 

Scoggin Dickey Parts Center ( sponsor ). Nelson Performance also makes custom harnesses (sponsor).

 

Engine Control Module (ECM) C1



Connector Part Information
OEM: 15499466
Service: 88988931
Description: 73-Way F Receptacle 0.64 Sealed (BK)

Terminal Part Information
Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: A/5
Release Tool/Test Probe: 12094430/J-35616-4A (PU)
Pins: 1, 12-13, 16-17, 23-24, 29-36, 50-52, 56-59, 63, 68, 70-71
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 2, 9-11, 18-20, 27-28, 37-38, 41, 47, 49, 61, 64-65, 69
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C1 Pin
Wire Color
Circuit No.
Function

1
OG/BK
1786
Park/Neutral Signal

2
GY/BK
1694
4WD Low Signal (NP8)

3-8
--
--
Not Used

9
L-BU/WH
6311
Brake Switch Signal

10
PU/WH
1668
HO2S High Signal - Bank 1 Sensor 2

11
TN/WH
1669
HO2S Low Signal - Bank 1 Sensor 2

12
OG/BK
380
A/C Refrigerant Pressure Sensor Signal

13
TN
5514
Low Reference

14-15
--
--
Not Used

16
PU
1589
Fuel Level Sensor Signal - Primary

17
D-BU/WH
473
High Speed Cooling Fan Relay Control

18
D-BU
5985
Accessory Wakeup Serial Data

19
PK
439
Ignition 1 Voltage

20
RD/WH
440
Battery Positive Voltage

21-22
--
--
Not Used

23
PU
1272
Low Reference

24
D-GN
890
Fuel Tank Pressure Sensor Signal

25-26
--
--
Not Used

27
TN
2501
High Speed GMLAN Serial Data Bus -

28
TN/BK
2500
High Speed GMLAN Serial Data Bus +

29
D-BU
1161
APP Sensor 1 Signal

30
BN
1271
Low Reference

31
TN/BK
6049
Low Reference

32
L-BU
1162
APP Sensor 2 Signal

33
GY
2709
5-Volt Reference

34
GY/WH
2700
5-Volt Reference

35
--
--
Not Used

36
TN
1274
5-Volt Reference

37
TN/BK
472
IAT Sensor Signal

38
TN
2760
Low Reference

39-40
--
--
Not Used

41
YE
492
MAF Sensor Signal

42-46
--
--
Not Used

47
PK/BK
1339
Ignition 1 Voltage

48
--
--
Not Used

49
TN
1671
HO2S Low Signal - Bank 2 Sensor 2

50
D-GN/WH
465
Fuel Pump Relay Control - Primary

51
TN
1465
Fuel Pump Relay Control - Secondary (Except NQZ)

52
YE/BK
625
Starter Enable Relay Control

53-55
--
--
Not Used

56
WH/BK
1164
5-Volt Reference

57
YE/BK
1827
Vehicle Speed Signal (JH6/JH7)

58
D-GN
335
Low Speed Cooling Fan Relay Control

59
YE
5991
Powertrain Relay Coil Control

60
--
--
Not Used

61
WH
1310
EVAP Canister Vent Solenoid Control

62
--
--
Not Used

63
D-GN/WH
459
A/C Compressor Clutch Relay Control

64
OG/WH
3223
HO2S Heater Low Control - Bank 2 Sensor 2

65
GY/WH
3122
HO2S Heater Low Control - Bank 1 Sensor 2

66-67
--
--
Not Used

68
BN/WH
419
MIL Control

69
PU
1670
HO2S High Signal - Bank 2 Sensor 2

70
--
--
Not Used

71
OG/BK
6399
Replicated TOS Signal

72
--
--
Not Used

73
BK/WH
451
Ground

 

Engine Control Module (ECM) C2



Connector Part Information
OEM: 13511426
Service: 19115670
Description: 80-Way F Receptacle 0.64 2.8 Sealed (GY)

Terminal Part Information
Pins: 2-3, 16, 34-35, 41-53, 58, 63-69
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 5-14, 17-33, 37-40, 56-57, 59-61, 70-79
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 5-14, 17-22, 29-33, 37-40, 56-57, 59-61, 70-79: J/J
Core/Insulation Crimp: Pins 26-27: K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C2 Pin
Wire Color
Circuit No.
Function

1
--
--
Not Used

2
PU/WH
6270
5-Volt Reference

3
GY
2701
5-Volt Reference

4
--
--
Not Used

5
BN
582
TAC Motor Control - 2

6
YE
581
TAC Motor Control - 1

7
--
--
Not Used

8
D-GN/WH
428
EVAP Canister Purge Solenoid Control

9
GY
5493
Cylinder Shutoff Solenoid Control (3) (LY5/LMG/L76/LC9)

10
D-BU
5491
Cylinder Shutoff Solenoid Control (1) (LY5/LMG/L76/LC9)

11
OG
5494
Cylinder Shutoff Solenoid Control (4) (LY5/LMG/L76/LC9)

12
GY/WH
3113
HO2S Heater Low Control - Bank 1 Sensor 1

13
L-GN
3212
HO2S Heater Low Control - Bank 2 Sensor 1

14
L-GN/BK
5492
Cylinder Shutoff Solenoid Control (2) (LY5/LMG/L76/LC9)

15
--
--
Not Used

16
PU
5284
Camshaft Actuator Solenoid Control (L76,L92,LY6)

17
D-BU/WH
878
Fuel Injector 8 Control

18
TN/WH
845
Fuel Injector 5 Control

19
YE/BK
846
Fuel Injector 6 Control

20
TN
1744
Fuel Injector 1 Control

21
YE
410
ECT Sensor Signal

22
TN
2761
Low Reference

23-25
--
--
Not Used

26
D-BU
496
Knock Sensor 1 Signal

27
GY
1716
Low Reference

28
--
--
Not Used

29
L-BU
1876
Knock Sensor 2 Signal

30
GY
2303
Low Reference

31
--
--
Not Used

32
GY
23
Generator Field Duty Cycle Signal

33
BN
1174
Oil Level Switch Signal

34
BK
2755
Low Reference

35
TN
2752
Low Reference

36
--
--
Not Used

37
L-GN/BK
1745
Fuel Injector 2 Control

38
PK/BK
1746
Fuel Injector 3 Control

39
L-BU/BK
844
Fuel Injector 4 Control

40
OG/BK
877
Fuel Injector 7 Control

41
GY
2705
5-Volt Reference

42
--
--
Not Used

43
GY
2704
5-Volt Reference

44
D-BU
6259
5-Volt Reference

45-49
--
--
Not Used

50
TN/WH
331
Oil Pressure Sensor Signal

51
--
--
Not Used

52
TN
2199
Low Reference (L76, L92, LY6)

53
OG/BK
469
Low Reference

54-55
--
--
Not Used

56
TN
1664
HO2S Low Signal - Bank 1 Sensor 1

57
PU/WH
1665
HO2S High Signal - Bank 1 Sensor 1

58
L-GN
432
MAP Sensor Signal

59
PU
1666
HO2S High Signal - Bank 2 Sensor 1

60
TN
1667
HO2S Low Signal - Bank 2 Sensor 1

61
BN
25
Charge Indicator Control/Charge Indicator Signal

62
--
--
Not Used

63
PU
486
TP Sensor 2 Signal

64
D-BU/WH
6265
CMP Sensor Signal

65
D-GN
485
TP Sensor 1 Signal

66
BN
6266
Low Reference

67
--
--
Not Used

68
WH/BK
6271
CKP Sensor Signal

69
GY/BK
6272
Low Reference

70
PU
2121
IC 1 Control

71
PU/WH
2128
IC 8 Control

72
OG
2127
IC 7 Control

73
OG/WH
2122
IC 2 Control

74
L-BU/WH
2126
IC 6 Control

75
D-GN
2125
IC 5 Control

76
D-GN/WH
2124
IC 4 Control

77
L-BU
2123
IC 3 Control

78
BN
2129
Low Reference

79
BN/WH
2130
Low Reference

80
--
--
Not Used

 

WHOA! Thanks Grumpy! WHere do you find that info? That is for the 07 Tahoe?

 

yes that is for the 07 tahoe, its 4wd, you didnt specify, they should be the same though.... working at the stealership has its perks
If you need anything else let me know


Brian

 

That's great to know, thanks for the awesome information. I was reading somewhere about the V4 system, does this one have it? Yes. it's a 2wd.

 

WOW