Owner's Manual
Page 287
...trailer towing. See "Engine Coolant" in the Index. 285 See "Specifications 'and Capacities" in the Index. ITEM NO. Clean the outside the radiator and air of these conditions: In heavy city traffic where the outside temperature regularly reaches90°F (32OC) or higher. If you do'notuse your... spark plugs with newor approved recycled coolant conforming toGM Specification 1825M. Replace as needed. In hilly or mountainous terrain. CoolingSystemService*-Drain,flushand refill the system with the proper type. Inspect hoses and replace they are cracked, if swollen or deteriorated.
...trailer towing. See "Engine Coolant" in the Index. 285 See "Specifications 'and Capacities" in the Index. ITEM NO. Clean the outside the radiator and air of these conditions: In heavy city traffic where the outside temperature regularly reaches90°F (32OC) or higher. If you do'notuse your... spark plugs with newor approved recycled coolant conforming toGM Specification 1825M. Replace as needed. In hilly or mountainous terrain. CoolingSystemService*-Drain,flushand refill the system with the proper type. Inspect hoses and replace they are cracked, if swollen or deteriorated.