called crutchfield and they never heard of your tach not working.

 

nobody can confirm what crutchfield said. will the tach still work on a 2003 with an rds radio if i go to an aftermarket hu?

 

I have a 2001 chevy blazer and I am looking to run a subwoofer cable cleanly from the HU to the cargo area, any tips or tricks?

 

i have a 96 blazer and i ran the wires from the head unit across the steering column inside the dash and down past the parking brake and all the way to the back i tucked it under the plastic on the edge of the floor so it cant be seen at all its pretty clean look for small openings to run the wires through just make sure nothing is going to pinch or squeeze the wires where you run them

 

The rds runs through the class 2 data bus to figure out what the tach signal is. there is no tach wire that goes to the radio. so you will be fine with replacement of the factory radio with the after market. still unsure if the 03-05 blazer extreme dash bezel will fit into a standard s10. because they redesigned the frame of the dash. everyone ive talked to either fiberglassed the dash or went with a flip out. even tho a double din navi looks so much nicer.

 

So if you have a 03-05 Blazer, and not S10 I should be good with fitting a double din in there? I found a double din on crutchfield and it says it should fit.

 

to my knowledge, as far as the blazers go, they changed to the double din in 03. i have an 01 xtreme and i cant fit a double din...
edit: also my tach still works fine...

 

Can somebody tell me if it's possible to run an aftermarket sub and wire it into the stock radio? Somebody I know is saying it's impossible and I know it is possible.