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Makes 🢒 Pontiac 🢒 2005 🢒 Grand Prix 🢒 Bulletins 🢒 Gurgle Type Noise Coming From Instrument Panel (IP)/Heater Core Area at Start Up (Replace Heater Hoses)

Gurgle Type Noise Coming From Instrument Panel (IP)/Heater Core Area at Start Up (Replace Heater Hoses)

Subject:Gurgle Type Noise Coming From Instrument Panel (IP)/Heater Core Area at Start Up (Replace Heater Hoses)

Models:2006 Chevrolet Impala SS Built Prior to November 1, 2005
2005-2006 Pontiac Grand Prix GXP
with 5.3L Engine (VIN C -- RPO LS4)


Condition

Some customers may comment on a gurgle type noise coming from the IP/heater core area at start up.

Cause

Coolant flow within the heater core may be causing this noise.

Correction
Object Number: 1829675 Size: SH
(1)Lower Engine Heater Pipe
(2)Upper Engine Heater Pipe

Replace the inlet and outlet heater hoses to reverse the coolant flow though the heater core. Refer to the Inlet and Outlet Heater Hose Replacement procedures in SI. Be sure to install the hose ends as marked. The hose ends have a different diameter and are NOT interchangeable.

For the Impala SS only: After replacing the heater hoses, reprogram the HVAC control module using SPS with the latest software contained in TIS. This new software will allow the controller to properly bias the airflow to maintain correct heat output for the HVAC system.

Parts Information

Part Number

Description

Qty

15845682

Hose, Heater Inlet

1

15845674

Hose, Heater Outlet

1

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

D9706*

Replace Heater Hoses and Reprogram HVAC Control Module with SPS

(Impala SS Only)

1.0 hr

D2787

Hoses, Heater (All) - Replace

(Grand Prix GXP Only)

Use Published Labor Operation Time

*This labor operation is for bulletin use only. It will not be published in the Labor Time Guide.