Noice From A/c When Accelerating

[GMC_DENMARK]

Hi'

 

I live in Denmark, Europe and I'm in need of some help.

 

I have a 2003 GMC Savana 5.3 G1500.

 

When my A/C compressor is engaged, there is a lot of noise under acceleration... *I discovered that the tensioner was bouncing around, sometimes even hitting the oillines from the transmission cooler.

 

I've changed the tensioner, and it may have helped a little, but the problem is not solved.

 

Is this a known problem? If so, what will I need to do? If not, any ideas?

 

Any help is very welcome, since there is no GMC dealers in my country. I own one of perhaps 5 to 10 Savana's here in Denmark...

 

Btw. it's a Explorer conversion with rear A/C. Don't know if that matters?!?

 

Best regards

Brian

[Zembonez]

Generally when there is a lot of movement (or vibration) in the tensioner, it is the result of a bad idler pulley. When the pulley's bearing goes, it can make the belt fluctuate and vibrate wildly. They also usually make some noise.

 

Pull off the serpentine belt off and spin all of the pullies, checking for smoothness or side to side play. I bet you have one going bad. It is a very common problem.

[ChevyTech007]

Subject: Underhood Rattle Noise Heard On Acceleration (Check A/C System Performance and Compressor Operation)

 

 

Models: 2003-2004 Cadillac CTS

 

2002-2004 Cadillac Escalade, Escalade EXT

 

2003-2004 Cadillac Escalade ESV

 

2002-2004 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe

 

2002-2004 GMC Denali, Denali XL, Savana, Sierra, Yukon, Yukon XL

 

2002-2004 Commercial Upfitter Chassis Vehicles

 

2003-2004 HUMMER H2

 

with Air Conditioning (A/C)

 

 

 

 

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This bulletin is being revised to update the service procedure and parts information. Please discard Corporate Bulletin Number 03-01-38-019 (Section 01 -- HVAC).

 

 

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Condition

Some customers may comment about an underhood rattle noise heard on acceleration or a sudden loss of A/C system performance.

 

Cause

This condition may be caused by liquid slugging of the A/C compressor. This condition may cause an internal failure in the A/C compressor. The serpentine belt tensioner and serpentine belt may also be damaged.

 

Correction

Technicians are to check the A/C system performance and compressor operation using the following repair procedure:

 

Open the hood and inspect the A/C compressor for damage and to see if the compressor is seized. Verify that the serpentine belt is not damaged or missing. If the A/C compressor is seized, proceed to step 5.

Perform the A/C System Performance test. Refer to the Heating, Ventilation and Air Conditioning (HVAC) section of SI. Correct any performance concerns or refrigerant leaks that are found.

Inspect the vehicle for other possible sources of A/C compressor noise or performance concerns. Refer to Corporate Bulletin Number 01-01-38-013 for more information.

After all other possible sources of A/C compressor noise or performance concerns have been eliminated, only then should the A/C compressor be replaced.

Remove the A/C compressor. Refer to the A/C Compressor Replacement procedure in the HVAC section of SI.

Inspect the transmission cooler lines for damage due to contact from the serpentine belt. Replace the transmission cooler lines if necessary.

Install an inline A/C system filter. Refer to Corporate Bulletin Number 01-01-38-006C for more information about A/C system flushing and filter installation procedures. An A/C system flush is not to be done unless prior authorization is given by the GM Area Service Manager (in Canada, the District Service Manager).

Install an A/C Suction Screen. Refer to Corporate Bulletin Number 01-01-39-003A for more information about A/C suction screen repair recommendations and procedures.

Install a new A/C compressor. Refer to the Compressor Replacement procedure in the HVAC section of SI.

Install a new orifice tube for the front A/C system. Refer to the Expansion (Orifice) Tube Replacement procedure in SI.

If the vehicle is a 2003 model year Chevrolet Express or GMC Savana van, the vehicle may require a new accumulator. Refer to Corporate Bulletin Number 03-01-38-016 for more information. This bulletin refers to an updated design accumulator that may improve the performance of the A/C system.

Install a new serpentine belt tensioner and serpentine belt if they have been damaged due to A/C system slugging or an A/C compressor seizure. The serpentine belt tensioner may have broken stop tabs and/or a missing front cap.

Verify proper operation of the A/C system.

[GMC_DENMARK]

Subject: Underhood Rattle Noise Heard On Acceleration (Check A/C System Performance and Compressor Operation)

 

Hi ChevyTech007

 

Thanks for your reply.

 

I think this bulletin is spot on. But it refers to quite a few other bulletins and the HVAC section of SI. Is there anyway to get a hold of theese informations? As I wrote in the original post, there is no GMC dealers in my country, so right now, I'm kind of stuck between a rock and a hard place...

 

The thing is that spareparts are extremely expensive to import, so I would like to get it right the first time... (I just bought a rear bumper from the Explorer Van Company, price 390$, after paying shipping, customs and taxes here in Denmark, the price was about 2150$, and that's not including paintjob and installation...)

 

So. again, can you please help?

 

Best regards

Brian