C 1500 Truck 2WD V6-4.3L VIN W (2001)
Heater Hose: All Technical Service Bulletins
Interior - Noise/Vibration With A/C ON
File In Section: 01 - HVAC
Bulletin No.: 01-01-39-005A
Date: February, 2002
TECHNICAL
Subject:
Noise or Vibration in Passenger Compartment with A/C On Between 2000-2400 RPM (Replace Heater Outlet Hose)
Models:
2001-02 Chevrolet and GMC C/K Pickup Models
With 4.3L V6 Engine (VIN W - RPO L35) and Air Conditioning (RPO C60)
This bulletin is being revised to add additional procedures and graphics. Please discard Corporate Bulletin Number 01-01-39-005 (Section 01 - HVAC).
Condition
Some customers may comment on a resonating noise or vibration in the passenger compartment with the A/C on between 2000-2400 RPM.
Cause
The resonating noise or vibration may be transferred from the water pump through the heater outlet hose into the passenger compartment.
Correction
Follow the service procedure below to correct this condition.
1.
Disconnect the negative battery cable. Refer to the Battery Negative Cable Disconnect/Connect procedure in the Engine Electrical sub-section of
the Service Manual (SI2000 Document ID # 527201).
2.
Remove the generator cable from the generator and perform the following steps:
^
Reposition the boot in order to expose the stud.
^
Remove the generator cable nut.
^
Remove the generator cable from the stud and position the cable out of the way of the heater outlet hose.
3.
Partially drain the cooling system. Refer to the Draining and Filling Cooling System procedure in the Engine Cooling sub-section of the Service
Manual (SI2000 Document ID # 523104).
4.
using the J 43181, disconnect the heater hoses from the heater core outlet.
