How should one safely drain oil from gas charged shock absorbers on Buick Rainier?

Gas-charged shock absorbers include high-pressure gas within their tubes therefore you should never remove the snap ring to prevent severe personal injuries caused by gas expulsion. Safety glasses should be worn during shock absorber drilling and center punching to avoid tube puncture that could result in personal injury. Use a centerpunch to make the first indentation 10 mm (0.4 inch) from the bottom of the tube. Place the shock absorber inside the vise while it faces horizontally with its rod stretched completely to its longest length. Fit a 5 mm (3/16 inch) drill bit into the centerpunch hole to let gas or gas/oil mixture exhaust before collecting escaping oil using shop towels. A second hole at the centerpunch location in the tube's center should be drill using a 5 mm (3/16 inch) drill bit which will also release oil. Similar to the first step, shop towels should be used to catch the escaping oil. Using the drain pan with holes facing down position the shock absorber horizontally and move rod through tube in and out movements to evacuate all oil from the absorber.

OEM Buick Rainier Shock Absorber

Suspension Shock Absorber

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Buick Rainier Shock Absorber, Front
Part Number: 15098727
$120.98 MSRP: $227.20
You Save: $106.22 (47%)
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Product Specifications
- Other Name: Absorber, Front Shock; Suspension Strut and Shock Assembly Kit; Air to Coil Spring Conversion; Complete Strut Kit.; Strut
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Rainier Shock Absorber
Part Number: 25820699
$145.52 MSRP: $271.54
You Save: $126.02 (47%)
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Product Specifications
- Other Name: Shock; Absorber, Front And Rear Suspension
- Position: Rear
- Replaces: 15159645, 15172343, 15206892, 15894447, 15172340, 25865982, 25820694, 15159648, 15172342, 15894449, 15894448, 25820695
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Rainier Shock Absorber, Front Driver Side
Part Number: 15098726
$79.86 MSRP: $236.33
You Save: $156.47 (67%)
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Product Specifications
- Other Name: Front Shock Absorber Kit; Suspension Assembly; Air Spring to Coil Conversion; Complete Strut Set; Strut; Absorber, Front And Rear Suspension; Shock
- Position: Front Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Buick Rainier | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Rainier Shock Absorber, Front
Part Number: 15098725
Product Specifications
- Other Name: Front Shock Absorber Kit; Suspension Assembly; Air Spring to Coil Conversion; Complete Strut Set; Strut; Absorber, Front And Rear Suspension; Shock
- Position: Front
- Replaces: 15063734
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Buick Rainier | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Rainier Shock Absorber
Part Number: 88965472
Product Specifications
- Other Name: Absorber Kit, Front Shock; Suspension Shock Absorber; Link; Absorber Kit, Front And Rear Suspension; Shock
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS

Buick Rainier Shock Absorber

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Buick Rainier Shock Absorber Parts Questions & Experts Answers

Shock Absorber, Front
15098727
Q: How should one safely drain oil from gas charged shock absorbers on Buick Rainier?
A: Gas-charged shock absorbers include high-pressure gas within their tubes therefore you should never remove the snap ring to prevent severe personal injuries caused by gas expulsion. Safety glasses should be worn during shock absorber drilling and center punching to avoid tube puncture that could result in personal injury. Use a centerpunch to make the first indentation 10 mm (0.4 inch) from the bottom of the tube. Place the shock absorber inside the vise while it faces horizontally with its rod stretched completely to its longest length. Fit a 5 mm (3/16 inch) drill bit into the centerpunch hole to let gas or gas/oil mixture exhaust before collecting escaping oil using shop towels. A second hole at the centerpunch location in the tube's center should be drill using a 5 mm (3/16 inch) drill bit which will also release oil. Similar to the first step, shop towels should be used to catch the escaping oil. Using the drain pan with holes facing down position the shock absorber horizontally and move rod through tube in and out movements to evacuate all oil from the absorber.