Go to www.lmctrucks.com they will have nearly everything for it.
Whoops!! correction it's www.lmctruck.com
PAY ME
On a 1998 Chevy Blazer, the parking brake switch is located on the top of the parking brake assembly. There are 3 bolts that hold the switch to the parking brake assembly.
Depends upon what year the vehicle is. They all have a series of screws holding the lens/assembly in. 1982 and prior (K5 Blazer) are visible from the vehicle's exterior. 1982 through 2004 (S-10 style) have a series of screws on the inboard side of the assembly.
Behind the dash assembly inside the heater box. Dash assembly must be removed to gain access.
It is located behind the dsah assembly, attached to the HVAC assembly. You need to remove dash to gain access to it.
The temp blend door is located behind the dash assembly in the HVAC assembly. Unfortunately the entire dash assembly needs to be removed to gain access.
Buy a Haynes Manual or similar OR take it to a mechanic :-)
The library should have a shop manual...
You didn't mention what year Blazer you have but in most cases the blend door actuator is located on top of the HVAC box that is located behind the dash assembly. Unfortunately, the entire dash assembly must be removed to gain access to it.
Behind the dash assembly, big job for the faint at heart.
new weather stripping.caulkingor new window assembly
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008f53e