Noise Diagnosis - Instrument Panel and Header. Opel Sintra 1999

For 1990-2009 cars

### Front Dash Chirp (Right Side)

#### Symptom

There may be a chirp noise coming from the front of the dash on the passenger side.

#### Possible Cause

The HVAC air inlet seal (1) may not be fully seated against the front of the dash sheet metal.

#### Diagnosis

1. Remove the pollen filter. Refer to Passenger Compartment Air Filter Replacement in HVAC Systems with A C - Manual.
2. Remove the I/P trim pad. Refer to Instrument Panel Trim Pad Replacement in Instrument Panel, Gauges and Console.
3. Reach through the Pollen filter access hole and verify there is a gap between the HVAC air inlet seal (1) and the front of the dash sheet metal.

#### Corrective Action

Carefully move the HVAC to maximize the amount of clearance between the seal (1) and the front of the dash sheet metal. once you have obtained a small gap, lubricate the HVAC air inlet seal (1) with dielectric grease GM P/N 12345579.

### Front of Dash Chirp

#### Symptom

There may be a chirp noise coming from the front of the dash area.

#### Possible Cause

The HVAC air inlet grille (1) may be contacting the lower edge of the windshield (2).

#### Diagnosis

Isolate the HVAC air inlet grille (1) at the locations indicated with a piece of paper. Record any changes heard.

#### Corrective Action

Attach a piece of 1-2 mm (0.039-0.079 in) thick foam tape to the back side of the HVAC air inlet grille (1) at the points of contact on the windshield (2).