Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 479 (COMMON SPECS & PROCEDURES)AIR CONDITIONINGAUTOMATIC SYSTEMAUTO A/C SERVICE SPECIFICATIONS

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Auto A/C Service Specifications

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Auto A/C Service Specifications

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

AUTO A/C SERVICE SPECIFICATIONS

Application

Specification

PAG Oil

U.S. Vehicles

P/N 12345923

Canadian Vehicles

P/N 10953486

Accumulator Replacement ⁽¹⁾

2 ozs.

Compressor Replacement ⁽²⁾

⁽³⁾ 2 ozs.

Condenser Replacement ⁽³⁾

1 ozs.

Evaporator Replacement ⁽³⁾

3 ozs.

Total System Oil Capacity

7.40 ozs.

Total System Oil Capacity with Rear A/C

8.45 ozs.

Refrigerant Charge (R-134a)

1.9 lbs.

Refrigerant Charge with Rear A/C

3.0 lbs.

⁽¹⁾	Add PAG oil equal to the amount of oil drained from the old accumulator plus the specified additional amount.

⁽²⁾	A Sanden scroll compressor containing 240ml of oil is used on this model year.

⁽³⁾	If more than the specified amount of oil was drained from a component, add the equal amount of oil drained.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.