Question about 1998 Chevrolet K1500

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I have a 1991 chevy 1500 with air. The problem is a clicking or knocking noise coming fromthe air door behind the blower motor. I can lift the door with a screw driver a little and the noise stops. I need to know how to adjust the door or do I need to change something. I do not see how to get the heater out from under the dash. Any suggestions would help.

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Look over where the air dor is the is a deive with a two wire harness,the device usually has a yellow sticker on it, unplug the harness+ no more clicking just did last night 12/18/08

Posted on Dec 19, 2008

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Clicking noise coming from the heater blower motor


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How to remove the heater blower fan on 92 chevy 1500


Heater Core - REMOVAL & INSTALLATION
1991-92 R/V and 1991-98 C/K Series
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the instrument panel glove compartment.
  4. Tag and unplug all electrical leads as necessary.
  5. Remove the center air distribution duct from the floor.
  6. If necessary, remove the ECM and mounting tray.
  7. Remove the hinge pillar trim panels.
  8. Remove the blower motor cover and then remove the motor.
  9. Remove the steering wheel and tilt back the instrument panel slightly.
  10. Remove the coolant overflow tank. Disengage the heater hoses at the core connections.
  11. Unfasten the attaching screws and nut and then remove the heater case.
  12. Remove the seven screws and lift off the heater case cover.
  13. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case.
To install:
  1. Install the heater core in the case.
  2. Install the heater case bottom plate. Make sure there is a good seal.
  3. Install the heater case into the truck. Tighten the 4 lower screws to 17 inch lbs. (2 Nm); the upper screw to 97 inch lbs. (11 Nm); and the nuts to 25 inch lbs. (2.8 Nm).
  4. Connect the heater hoses at the core tubes.
  5. Install the coolant overflow tank.
  6. Install the instrument panel and the steering wheel.
  7. Install the blower motor and cover.
  8. Install the trim panels and if removed, the ECM. Install the air distribution duct and reconnect all electrical leads.
  9. Install the glove compartment. Fill the cooling system and connect the battery cable.


Blower Motor - REMOVAL & INSTALLATION
1992-98 Models
(see Figure 4)
  1. Disconnect the negative battery cable.
  2. Remove the right rear quarter panel trim.
  3. Disconnect the electrical lead at the fan.
  4. Remove the screws and if equipped, the cooling tube.
  5. If necessary, remove the fan retaining nut and lift out the blower fan.
  6. Remove the blower motor.
To install:
  1. Install the blower motor and then position the fan.
  2. Install the retaining nut and then tighten the mounting screws to 12 inch lbs. (2 Nm).
  3. If removed, install the cooling tube.
  4. Connect the electrical lead. Install the quarter panel trim cover.
  5. Connect the battery cable.
zjlimited_45.jpg

Fig. 4: Auxiliary heating and A/C system





Hope this helps (remember to rate this answer).

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Tapping noise near computer 1994 Chevy 1500 Silverado


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Knocking noise from air evap unit


2 fixes - read on - one quick and one long and hard
(little tip - take pics (camera phone) rather than try and remember how it should all go back together)

the knocking is a motor and gears that move the fresh air/recycle flap - it is up behind the dashboard behind the glovebox
the problem is that the gears wear and become misaligned
the flap then can not open fully, its doesnt reach its end stop which switches the motor off
so the motor keeps going the and the gears keep clicking over

the big cylindrical thing you are seeing is the blower motor - it should have a red and a black wire going to it

1. quick fix first
remove the wires to the blower motor
undo the 3 brass coloured cross head screw from around the blower motor
remove the blow motor and fan
turn on the ignition and put the air flow to fresh air (i.e not recycle)
the knocking should start
lay on your back with your head i the footwell
with torch and hands locate the motor/gears that are knocking
find the wires to the motor and remove or cut them (if cutting turn the ignition off first !!!)
make sure the flap is in the open position, tape,jam or wire it open (who uses the recycle position anyway ??)

2. long hard fix
remove the blower motor as described above
this leaves the fan casing
from the engine bay remove the plastic cover from the top where the windsceen wiper motor is (just below the windscreen)
depending on model you may have the engine management CPU on the right handside - this may need removing
on the right hand side there will be 3 (maybe 4) bolts just above where the fan housing is
undo these - note i have seen these with the bolt head in side the car and some with the bolt head on the engine side - dont know why ???
if they are inside the car - you need to remove air trunking, repostion wires and get a long thin socket extension and some flexible bit to be able to get a socket on the head.

once all this is out - locate the motor/gear making the noise (as above)

remove the motor wire and after removing any more obstructing object remove the motor and gears- you will need to be very flexible and have a good range of flexi and rightangle drive socket bits

now all you need to do is purchase the new gears (if peugeot have any) rebuild it all and refit, then put everything back as you found it

shouldnt take more than a day or two, or a finger or two

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Replacing a blower motor 1998 chevy 1500


pull glove box out blower is mounted behind it

Jan 05, 2009 | 1998 Chevrolet K1500

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