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 MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/C - PUREGUARD 2 OPERATING ALERTTANK-TO-TANK REFRIGERANT TRANSFER
1990 Chevrolet Lumina APV V6-191 3.1L
Tank-to-Tank Refrigerant Transfer
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Tank-to-Tank Refrigerant Transfer
^ When adding refrigerant from a new tank into the ACR4 tank, a hose clearing procedure must be done to lower the high side pressure below 50 psi. This deactivates the low side alarm. If high side pressure is above 50 psi while low side pressure is below 30 psi, the low side alarm will sound and the PureGuard 2 will turn the ACR4 off before refrigerant transfer is complete. Refer to pages 17-18 of the ACR4 Operating Instructions Manual for a detailed procedure on adding refrigerant.
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.