[raptor]

I don't know if this has been posted or not but this is the PCM pin-out for the L99 and LS3. There are two connectors on the PCM, X1 and X2. X1 is a 73-way connector while X2 is an 80-way.

X1 pinout (73 way):
pin# wire color description________________________________
1 OG/BK Park/Neutral Switch (MYC)
2-7 N/A N/A
8 L-GN Backup lamp switch signal (M10)
9 BU/WH Brake pedal switch signal
10 PU/WH HO2S High Signal Bank 1 Sensor 2
11 PU/WH HO2S Low Signal Bank 1 Sensor 2
12 OG/BK A/C Refrigerant Pressure Sensor Signal
13 TN Low Reference
14-15 N/A N/A
16 D-BU Fuel Level Sensor Signal
17 D-BU High Speed Cooling Fan Relay Control
18 D-BU Serial Data Wake-Up Signal
19 PK Ignition Voltage
20 RD/WH Battery Positive Voltage
21 OG Brake Booster Vacuum Sensor Signal
22 YE/BK Low Reference (L99)
23 PU Low Reference
24 D-GN Fuel Tank Pressure Signal
25 N/A N/A
26 YE Clutch Pedal Position Sensor (M10)
27 TN Hi Speed GMLAM Serial Data Bus-
28 TN Hi Speed GMLAM Serial Data Bus+
29 D-BU APP Sensor 1 Signal
30 BN Low Reference
31 BN/WH Low Reference
32 L-BU APP Sensor 2 Signal
33 GY 5 volt Reference 1
34 GY 5 volt Reference 1
35 N/A N/A
36 TN 5 volt Reference 1
37 L-BU Intake Air Temp Sensor Signal
38 TN Low Reference
39-40 N/A N/A
41 YE MAF Sensor Signal
42 WH Low Reference (M10)
43-46 N/A N/A
47 PK/BK Ignition Voltage
48 N/A N/A
49 TN HO2S Low Signal Bank 2 Sensor 2
50 D-GN/WH Fuel Pump Relay Control
51 N/A N/A
52 PU/WH Starter Relay Control
53 GY 5 volt Reference 2 (L99)
54 TN 5 volt Reference 2 (M10)
55 N/A N/A
56 WH/BK 5 volt Reference 2
57 N/A N/A
58 D-GN Low Speed Cooling Fan relay Control
59 YE Powertrain Relay Control
60 N/A N/A
61 WH EVAP Canister Vent Solenoid Control
62 N/A N/A
63 D-GN/WH A/C Compressor Clutch Relay Control
64 OG/WH HO2S Heater Low Control Bank 2 Sensor 2
65 GY/WH HO2S Heater Low Control Bank 1 Sensor 2
66 GY Skip/Shift Solenoid Control (M10)
67 N/A N/A
68 BN/WH MIL Control
69 PU HO2S High Signal Bank 2 Sensor 2
70 L-BU Fuel Level Sensor Signal-Secondary
71 GY/BK VSS Signal High (M10)
72 PU/WH VSS Signal Low (M10)
73 BK/WH Ground
-----------------------------------------------------------------


X2 pinout (80 way):
pin# wire color description________________________________
1 N/A N/A
2 PU/WH 5 Volt Reference 2
3 GY 5 Volt Reference 2
4 N/A N/A
5 BN TAC Motor Control -2
6 YE TAC Motor Control -1
7 N/A N/A
8 D-GN/WH EVAP Canister Purge Solenoid Control
9 GY Valve Lifter Oil Manifold (VLOM) Assy Cyl 6 Shutoff Solenoid (L99)
10 D-BU Valve Lifter Oil Manifold (VLOM) Assy Cyl 1 Shutoff Solenoid (L99)
-----------------------------------------------------------------------------------------
11 OG Valve Lifter Oil Manifold (VLOM) Assy Cyl 4 Shutoff Solenoid (L99)
Reverse Lockout Solenoid Control (M10)
-----------------------------------------------------------------------------------------
12 GY/WH HO2S Heater Low Control Bank 1 Sensor 1
13 L-GN HO2S Heater Low Control Bank 2 Sensor 1
14 L-GN Valve Lifter Oil Manifold (VLOM) Assembly Cylinder 7 Shutoff Solenoid (L99)
15 N/A N/A
16 PU CMP Actuator Solenoid Control-Intake Bank 1 (L99)
17 D-BU/WH Fuel Injector 8 Control
18 TN/WH Fuel Injector 5 Control
19 YE/BK Fuel Injector 6 Control
20 TN Fuel Injector 1 Control
21 YE ECT Sensor Signal
22 TN Low Reference
23 TN/WH Transmission Fluid Temp Sensor Signal (M10)
L-BU Oil Temp Sensor Signal (MYC)
24 OG/BK Low Refernce (M10)
25 N/A N/A
26 D-BU Knock Sensor (KS) 1 Signal
27 GY Knock Sensor (KS) 1 Signal
28 N/A N/A
29 L-BU Knock Sensor (KS) 2 Signal
30 GY Knock Sensor (KS) 2 Signal
31 N/A N/A
32 GY Generator Field Duty Cycle Signal
33 BN Oil Level Switch Signal
34 BK Low Reference
35 TN Low Reference
36 N/A N/A
37 L-GN/BK Fuel Injector 2 Control
38 PK/BK Fuel Injector 3 Control
39 L-BU/BK Fuel Injector 4 Control
40 OG/BK Fuel Injector 7 Control
41 GY 5 Volt Referencve 1
42 N/A N/A
43 GY 5 Volt Referencve 1
44 D-BU 5 Volt Referencve 1
45 N/A N/A
46 N/A N/A
47 N/A N/A
48 N/A N/A
49 N/A N/A
50 TN/Wh Oil Pressure Sensor Signal
51 N/A N/A
52 TN Low Reference (L99)
53 OG/BK Low Reference
54 N/A N/A
55 N/A N/A
56 TN HO2S Low Signal- Bank 1 Sensor 1
57 PU/WH HO2S High Signal- Bank 1 Sensor 1
58 L-GN MAP Sensor Signal
59 PU HO2S High Signal- Bank 2 Sensor 1
60 TN HO2S Low Signal- Bank 2 Sensor 1
61 BN Charge Indicator Control/Charge Indicator Signal
62 N/A N/A
63 PU TP Sensor 2 Signal
64 D-BU/WH Camshaft Position Signal
65 D-GN TP Sensor 1 Signal
66 BN Low Reference
67 N/A N/A
68 WH/BK Crankshaft Position Sensor Signal
69 GY/BK Low Reference
70 PU IC 1 Control
71 PU/WH IC 8 Control
72 OG IC 7 Control
73 OG/WH IC 2 Control
74 BU/WH IC 6 Control
75 D-GN IC 5 Control
76 D-GN/WH IC 4 Control
77 L-BU IC 3 Control
78 BN Low Reference
79 BN/WH Low Reference
80 N/A N/A