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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (HVAC SYSTEMS - MANUAL)REMOVAL & INSTALLATIONCOMPRESSORINSTALLATION (3.1L ENGINE)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Installation (3.1L Engine)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation (3.1L Engine)
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Add 2 ounces of PAG oil to the compressor crankcase prior to installation. Install the compressor drain plug. Tighten the compressor drain plug to specification. See TORQUE SPECIFICATIONS . Install the A/C compressor. Install the A/C compressor upper mounting bolts and tighten to specification.
- Install the A/C compressor lower mounting bolts. Tighten the bolts to specification. Install the new sealing washers. Install the A/C compressor hose assembly to the A/C compressor. Install the A/C compressor hose nut to the compressor. Tighten the nut to specification. Connect the electrical connector to the A/C compressor.
- Install the lower air deflector. Install the right side engine splash shield. Lower the vehicle. Install the accessory drive belt. Install the cross vehicle brace. Evacuate and recharge the A/C system. See RECOVERY, EVACUATION & RECHARGING in GENERAL SERVICING PROCEDURES article in GENERAL SERVICING.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.