B2300 SE Regular Cab 2WD L4-2.3L VIN D (2001)
4. Apply 241(35 psi) of air pressure to the heater core. Submerge the heater core in water.
5. If a leak is observed, replace the heater core.
4. Apply 241(35 psi) of air pressure to the heater core. Submerge the heater core in water.
5. If a leak is observed, replace the heater core.