03 trail blazer diagram

i have been looking for a wiring diagram for an 03 trailblazer.  Is it the same as the 02?  thanks

Yes it is the same

|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |

|              12V|red  (x2)           |+  |ignition harness            ||          STARTER|yellow              |+  |ignition harness            ||         IGNITION|pink                |+  |ignition harness            ||  SECOND IGNITION|white               |+  |ignition harness            ||        ACCESSORY|orange              |+  |ignition harness            || SECOND ACCESSORY|brown               |+  |ignition harness            ||       POWER LOCK|use Directed module |   |                            ||     POWER UNLOCK|part #455G *3       |   |                            ||       LOCK MOTOR|gray                |   |driver door module in door  ||     UNLOCK MOTOR|tan                 |   |driver door module in door  ||    DISARM DEFEAT|tan                 |   |relay box under rear seat   || PARKING LIGHTS +|brown               |   |driver kick panel           || PARKING LIGHTS -|gray/black          |   |headlight switch            ||       HEADLIGHTS|white               |-  |headlight switch            ||     DOOR TRIGGER|gray/black          |+  |underdash lt or dri A pillar|| DOME SUPERVISION|comes on with disarm|   |                            ||  TRUNK/HATCH PIN|pink/black *1       |-  |liftgate module             ||         HOOD PIN|pink/black          |-  |pin switch or BCM           ||  FCTRY ALARM ARM|                    |   |                            ||FCTRY ALRM DISARM|lt. green           |-  |driver door module in door  ||       TACHOMETER|white               |   |blue plug, pin 49 @ PCM *2  ||      SPEED SENSE|GREEN / WHITE         |   |blue plug, pin 32 @ PCM *2  ||       BRAKE WIRE|white               |+  |brake pedal switch          ||     HORN TRIGGER|black or blk/yel    |-  |steering column             ||           WIPERS|                    |   |                            ||  LF WINDOW UP/DN|blue - brown        |A  |driver door module          ||  RF WINDOW UP/DN|lt. blue - tan      |A  |front passenger door module ||  LR WINDOW UP/DN|blue - brown        |A  |LR window switch            ||  RR WINDOW UP/DN|blue - brown        |A  |RR window switch            || SUN RF OPN/CLOSE|blue/red - blue     |A  |sun roof motor              ||        RADIO 12V|orange              |+  |radio                       ||     RADIO GROUND|BLACK/ white         |-  |radio                       ||     RADIO SWITCH|                    |   |                            || RADIO ILLUMINATE|BROWN / white (dimmer)|+  |radio                       ||    POWER ANTENNA|gray                |+  |radio                       ||       LF SPEAKER|tan - gray          |   |radio                       ||       RF SPEAKER|lt. green - green   |   |radio                       ||       LR SPEAKER|brown - yellow      |   |radio                       ||       RR SPEAKER|blue - lt. blue     |   |radio                       |

Notes:

NOTE: This vehicle has the passlock II immobilizer system that, when adding a remote start, must be interfaced with. Use DEI part 555L.  *1 The liftgate glass ajar switch wire is purple. It is also located at the liftgate module in the liftgate.  *2 The PCM (Powertrain Control Module) is on the driver side of the motor.  *3 If Directed module part #455G is not available, refer to directfax document #1053.

Note: The 455G (I have only heard) does not work on the 03's. Theirs' a new one out that communicates with the BCM differently. Matter of fact I tried it on a Envoy with the 455G and it didnt work, I had to do it another way.