Aluminum wheels...TSB ?

[zephram22]

Came across this TSB at Alldatadiy.com. I'm having the conditions described in the TSB. My question is this: Are others having similar things happen, or am I the only one. For those that have had this happen, how has it been fixed? The TSB described the correction procedure, but I would rather fix it myself than go to the dealer and fork out more money for something they should have checked before I bought the car.

The TSB follows. Sorry for the long post.

Aluminum Wheels - Low Tire Pressure Condition
Bulletin No.: 05-03-10-003
Date: March 31, 2005
TECHNICAL
Subject:
Low Tire Pressure, Leaking Cast Aluminum Wheels (Repair with Adhesive Sealant)
Models:
2005 and Prior GM Passenger Cars and Light Duty Trucks
2005 and Prior Saturn Vehicles
with Cast Aluminum Wheels
Supercede:
This bulletin is being revised to include additional models and repair information. This bulletin cancels and replaces Corporate Bulletin Numbers 93-3E-106, 93-263-3E and 93-U-57. Please discard Corporate Bulletin Numbers 93-3E-106, 93-263-3E and 93-U-57.
Condition
Some customers may comment on a low tire pressure condition.
Diagnosis of the low tire pressure condition indicates an air leak through the cast aluminum wheel.
Cause
Porosity in the cast aluminum wheel may be the cause.
Correction
1.Remove the tire and wheel assembly from the vehicle.
2.Locate the leaking area by inflating the tire to 276 kPa (40 psi) and dipping the tire/wheel assembly in a water bath, or use a spray bottle with soap and water to locate the specific leak location.
Important: ^If the porosity leak is located in the bead area of the aluminum rim (where the tire meets the rim), the wheel should be replaced.
^If two or more leaks are located on one wheel, the wheel should be replaced.
1.If air bubbles are observed, mark the location.
^If the leak location is on the tire/rubber area, refer to Corporate Bulletin Number 04-03-10-001A or newer - Tire Puncture Repair Procedures for All Cars and Light Duty Trucks.
^If the leak is located on the aluminum wheel area, continue with the next step.
2.Inscribe a mark on the tire at the valve stem in order to indicate the orientation of the tire to the wheel.
3.Dismount the tire from the wheel.
4.Scuff the INSIDE rim surface at the leak area with # 80 grit paper and clean the area with general purpose cleaner, such as 3M(R) General Purpose Adhesive Cleaner, P/N 08984, or equivalent.
5.Apply a 3 mm (0.12 in) thick layer of Silicone-Adhesive/Sealant, GM P/N 12378478 (Canadian P/N 10953493) or equivalent, to the leak area.
6.Allow for the adhesive/sealant to dry.
Note: Caution must be used when mounting the tire so as not to damage the sealer. Damaging the repair area may result in an air leak.
7.Align the inscribed mark on the tire with the valve stem on the wheel.
8.Mount the tire on the wheel.
9.Pressurize the tire to 276 kPa (40 psi) and inspect for leaks.
10.Adjust tire pressure to meet the placard specification.
11.Balance the tire/wheel assembly.
12.Install the tire and wheel assembly onto the vehicle. Refer to the appropriate service procedure in SI.