So i bet this has been asked a MILLION times, buttt i have a 1994 4 door 4x4 LS with the tachless Display. Can i install one with a tach, or is the harness just not there?

 

1995* sorry.

 

I am not sure the answer but hope this helps =)
https://blazerforum.com/forum/1st-generation-s-series-1983-1994-tech-40/installing-tach-51299/

 

Ok 95 then check https://blazerforum.com/forum/2nd-ge...19/#post479260 found that when searching for 94 haha

 

I haven't done it but I know a few members on here have! I'm sure they will be along to chime in sooner or later just give it time.

 

Yea, my dad can't understand why i need a tach on an automatic. I've grown up on nothing but standard shift. But its my winter beater. I just like tachs. Plus eventually i need to adjust the shift points, if i can. it seems to shift at like 3500-4000rpm in 3rd gear, under regular acceleration. . No matter if its in OD or D. I also figured out it likes middle grade gas better. Go figure.

 

I didn't even think about the fact, that if i swap the Cluster, that the mileage will be wrong, and turning them back is impossible. FML

 

If your willing to take both of them you can swap the odometers to keep the original miles

 

https://blazerforum.com/forum/2nd-generation-s-series-1995-2005-tech-41/speedometer-replace-7536/ this talks more about what your concerns are hope it helps.