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 354 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATIONPRESSURE REGULATORINSTALLATION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Pressure Regulator: Installation
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
- Install the pressure regulator valve (1).
- Install the pressure regulator isolator spring (3) and the pressure regulator valve spring (2). See Figure.
- Install the reverse boost valve (4) in the reverse boost valve sleeve (5).
- Install the reverse boost valve (4) and sleeve (5) in the oil pump cover. See Figure.
- Compress the reverse boost valve sleeve into the bore of the oil pump to expose the retaining ring slot.
- Install the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve. See Figure.
- Install the transmission oil filter and pan. See DRAINING & REFILLING under LUBRICATION.
- Lower the vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION .
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.