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 MANUALSCHEVROLET1994K 2500 SUBURBAN 4WD V8-350 5.7LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONFUNCTIONAL TEST/CHECK
1994 Chevrolet K 2500 Suburban 4WD V8-350 5.7L
Functional Test/Check
1994 Chevrolet K 2500 Suburban 4WD V8-350 5.7LSECTION Functional Test/Check
Use the following Cycling Clutch Orifice Tube (CCOT) "Hand-Feel" procedure if the A/C system has the proper charge of Refrigerant-12 0r -134 (providing ambient temperature is above 21°C (70°F).
1. Engine must be warm and at normal idle speed.
2. Hood and body doors open.
3. Press "A/C" button to activate the air conditioning system.
4. Temperature selector to COLD.
5. Blower on HI.
6. "Hand-Feel" the temperature of the evaporator inlet pipe after the orifice and accumulator with the compressor engaged.
- Both the same temperature and some degree cooler than ambient: Charge is sufficient - check for other problems (Refer to A/C System Diagnostic Procedure).
- If Temperatures Vary: Charge is insufficient. Leak test and check for other problems. Testing and Inspection
1. Engine must be warm and at normal idle speed.
2. Hood and body doors open.
3. Press "A/C" button to activate the air conditioning system.
4. Temperature selector to COLD.
5. Blower on HI.
6. "Hand-Feel" the temperature of the evaporator inlet pipe after the orifice and accumulator with the compressor engaged.
- Both the same temperature and some degree cooler than ambient: Charge is sufficient - check for other problems (Refer to A/C System Diagnostic Procedure).
- If Temperatures Vary: Charge is insufficient. Leak test and check for other problems. Testing and Inspection
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.