I know that alot of people were wondering about the painless wiring harness for use on there Blazers, so here goes my two cents on the matter. I'm about finished re-wiring mine using the 18 circuit kit number 10205( for gm trucks from 73-86. I have a 86. The only real downfall I see to the system on the design side is they missed a few of the wiring needs, but it is for truck and not blazers. They don't have the wiring for the rear window which is not that hard to fix. On the other hand they do put alot of extras on the thing, like an electrical fan and electrical fuel pump provitions. Another thing that is lacking is the cruise control wiring. They don't give you the wiring that actually runs to the cruise control unit, which sucked for me because all my wires roasted when the thing caught fire. Also no exterior wires for the Torque converter on auto transmissions, and no wiring to the tranfer case indicator switch. It does, however, have the provision forht 4WD indicator light in the instrument panel. I hope this helps, I know some of you guys were thinking about buyingthe kit. I picked it up at AutoZone for $482,which I thought was over priced. I think that it is a good complete wiring harness forthe most part, with the exception of the things mentioned earlier. Sorry it took so longto tell you how the install went.