I have a 1996 Buick Gran Sport that the blower started making a noise like some insulation or something is flapping against the fan. How do you remove the blower housing to gain access?

run the fault codes to find the reason for the limp mode
fix the faulty parts
reset the ECM using the scan tool
if you don't fix it will go straight back to limp mode

It is normal for the fan to stay on after the engine is off. The clicking is not. Once the negine is cooled down and the fan is not running. check the fan by spinning it and try to locate the clicking noise. Make sure the fan doesn't wobble. If it does then the bearings are going out, replace the fan. The clicking could be something lodged in the shroud, clicking against the fan blade. Like a stick.

Most GM vehicles have little flaps or doors to redirect the air near the blower motor. If that gets out of place or falls down it will rub on the squirrel cage of the blower fan. Some older cars have insulation in that area that might come loose and rub on the squirrel cage. The insulation sometimes is covered with a stiff paper. Cutting away the stiff paper with allow more clearance.

did you check the battery cables. make sure they are tight.

Brake light switch. Should be against brake pedal arm under dash. May be loose or need adjusting.

Not likely getting a bad TPS.Your TPS runs off a 5volt reference wire.Using multimeter with key on engine off Check to make sure you have your 5volt reference check for any deformed terminals or broken wires inside insulation.

take it to dealer and get the scrappage on it against a new car.Most likely cause is low on fluid ---BUT --- anything from a worn pump to a worn front clutch

without more information sounds like dead starter

Hi ,that noise can be the blower fan rubbing against the housing ,this is a very comon problem in many sistems ,they get worn with time and out of balance and start making noise....C1