Installed a 5.3 out of an 03 Suburban in my 95 GMC Sierra and was told by S & P that my tach won't work right. The reason is that the 5.3 tach signal shows as a 4 cylinder and won't work with a 8 cylinder gauge. Anyway, need to buy a dakota digital SGI-8 module to solve this problem. My question is from where does the 95 get its tach signal? The hanes manual shows that it comes from the " generator", which I think is the alternator, and that the wire is white. The only wire that came off that alternator was but a black wire, not white. So, where is the wire I need to find that is suppose to go to the 95 tach?? 
