| 97 3.8 PCM to Dash Harness | 99 LS1 PCM to Dash Harness | |||||||
| Black Plug | ||||||||
| A | Purple | Starter | ||||||
| B | Back w/Stripe | Ground | ||||||
| C | Orage | PCM 20 | Battery Feed (Underhood) | White (220) Plug | ||||
| D | Red | Fuel Pump Test Feed | A | TAN | Oil Pressure | |||
| B | GRY | PCM 32 | Clutch Anticipate Switch Signal | |||||
| White Plug | C | PNK | C105-B | IGN Power for TCC Stop Lamp Switch | ||||
| A | Red | PCM 16 | Alternator IND CTRL | D | PPL | PCM 33 | TCC/Cruse Brake Switch | |
| B | Beige | Oil PSI Sensor | E | BLK/WHT | Ground | |||
| C | Brown | Oil Level Sensor | H | ORN/BLK | PCM 34 | PNP Switch Signal | ||
| E | Pink | PCM 19 | Ignition Feed (Underhood) | J | YEL/BLK | Low Coolant Indicator | ||
| G | Green w/Stripe | PCM 13 | VSS Output | K | DK GRN/WHT | PCM 50 | VSS Output | |
| J | Green w/Stripe | PCM 8 | Fuel Pump Relay Control | |||||
| K | Green | Coolant Temp Sensor | Blue (230) Plug | |||||
| A | GRY | PCM 46 | 5V Feed (Fuel tank pressure) | |||||
| Blue Plug | B | BRN/WHT | PCM 46 | MIL Control | ||||
| B | Brown w/Stripe | PCM 25 | MIL Lamp Control | C | WHT | PCM 45 | EVAP Canister Vent Valve Control | |
| D | White | ICM Pin E | Engine Speed | E | DK BLU | PCM 30 | Theft Detterent Fuel Enable | |
| E | Blue | PCM 55 | Theft Deterrent Fuel Enable | F | DK GRN/WHT | PCM 17 | A/C Request | |
| F | Green w/Stripe | PCM 62 | A/C Request | G | GRY | PCM 23 | Fuel Ground | |
| G | Pink | C105-B | IGN Power for TCC Stop Lamp Switch | H | DK GRN | PCM 64 | Fuel Tank Pressure | |
| H | Lght Blue w/Stripe | PCM 67 | TCC Brake Switch | J | PPL | PCM 54 | Fuel Level Input | |
| K | Purple | PCM 59 | Serial Data (Class 2) | K | DK GRN | PCM 58 | Serial Data (Class 2) | |
| 97 3.8 PCM to Front Harness | 99 LS1 PCM to Front Harness | |||||||
| Large Plug | C100 Plug | |||||||
| A | Pink | A | PNK | Hot in Run and Start (IGN/INJ Bank 1 15A) | ||||
| B | Green W/Stripe | PCM 35 | A/C Compressor Clutch Relay Control | B | DK GRN/WHT | PCM 43 | A/C Clutch Relay Control | |
| C | Green | (A/C compressor) | C | DK GRN | PCM 18 | A/C Clutch Status | ||
| F | Brown | PCM 68 | Power (Ignition) | D | GRY | TPS +5v to TCS | ||
| G | Pink | E | DK BLU | TPS signal to TCS | ||||
| H | Blue | PCM 31 | Hi Speed Cool Fan Control | G | PNK | Hot with IGN 1 Relay Engaged (Tranny/EGR 15A) | ||
| J | Green | PCM 32 | Low Speed Cool Fan Control | H | DK BLU | PCM 33 | Cooling Fan 2 and 3 Relay Control | |
| J | DK GRN | PCM 42 | Cooling Fan 1 Relay Control | |||||
| K | BLK | TPS sensor low to TCS | ||||||
| C101 Plug | ||||||||
| A | YEL/BLK | Low Coolant Sensor | ||||||
| B | PNK | Hot in Run and Start (IGN/INJ Bank 2 15A) | ||||||
| C | BRN | PCM 36 | Air Pump Relay Control | |||||
| D | DK GRN/WHT | PCM 9 | Fuel Pump Relay Control | |||||
| E | PNK/BLK | PCM 19 | Ignition Positive Voltage for PCM | |||||
| G | ORN | PCM 57 | Battery Positive Voltage for PCM | |||||
| Small Plug | H | BLK/WHT | Ground | |||||
| B | Pink | K | GRY/BLK | PCM 53 | TCS Spark Retard Signal to Brake Control Module | |||
| D | Green | PCM 13 | Cruise Control Inhibit | |||||
| E | Tan | PCM 15 | Serial Data (UART) | C105 Plug | ||||
| F | White | PCM 75 | Cruise Engaged Signal | B | PNK | Hot with IGN 1 Relay Engaged (TCC Stop Lamp Switch/MAF/O2 20A) | ||
| G | Purple w/Stripe | PCM 26 | 2nd Gear Start Indicator (A4) | D | DK GRN | PCM 37 | Cruise Control Inhibit | |
| H | Brown w/Stripe | PCM 33 | 2nd Gear Start Signal (A4) | F | WHT | PCM 13 | Cruise Engaged Signal | |
| G | WHT | PCM 10 | Tach out to Brake Control Module | |||||
| H | PPL | PCM 4 | AIR Solenoid Relay Control | |||||