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my 89 k1500 gets around 13-15
You can't by just looking at it. Just replace it.
4"x6" in dash and in rear
4x6 in the dash and 6x9 in the rear....
3/8" Allen
On top of the steering column, behind the dash.
Yes it will bolt right in there with no problems.
K means that it is a 4x4.
A short in the wiring.
Right behind the fuse block under the drivers side of the dash. Or on the steering column under the dash.
NO
Yes those 2 years are the same. Direct bolt in.