My non bose Trailblazer had cardboard "blanks" in the dash where the bose speakers would be if it had bose.
First, I made a cardboard prototype for tweeter placement and test fitting
I used 1/4" wood for the final version
Since RF didn't give a spec, I had to improvise
Its easier to drill all the holes while the wood is still one big piece, then jig the plates out
Test fit
Painted (if you leave the wood raw, it can be seen at certain angles - not a big deal to some people, but worth mentioning)
Installed (I later found that missing bolt)
Finished pic
NOTE: If you don't have the bose system, there are NO speaker leads in the dash. You will have to run them yourself.
First, I made a cardboard prototype for tweeter placement and test fitting

I used 1/4" wood for the final version

Since RF didn't give a spec, I had to improvise


Its easier to drill all the holes while the wood is still one big piece, then jig the plates out

Test fit

Painted (if you leave the wood raw, it can be seen at certain angles - not a big deal to some people, but worth mentioning)

Installed (I later found that missing bolt)

Finished pic

NOTE: If you don't have the bose system, there are NO speaker leads in the dash. You will have to run them yourself.