Hey guys im josh i have a 03 monte carlo ss 3800 motor. i just installed a dash from a 07 need a little help with wiring up the lights and cluster. On the 03 it has 11 wires for the gauges on the 07 it has 12 wire the colors dont match anyone have a color coded chart or has any one done this? Ive seen it done but they switched motors and whole wiring harness . I just wanted the dash and updated light switch and gauges. Any help would be much appreciated. I have pictures if needed

 

Just got an 06 SS. And good luck without changing all that. At least wiring harness. I had an 01 and still have 05. And 06 and 07 completely different than rest. And all wiring schematic I find online for 06 are not what they actually are