Pontiac Montana 2003 Owner's Manual

To change the engine oil in a Pontiac Montana 2003, first warm up the engine slightly, then locate the oil drain plug under the vehicle. Place an oil pan beneath it and unscrew the plug to let the old oil drain out completely. Replace the drain plug, remove the old oil filter, and install a new one. Finally, refill the engine with the appropriate type and amount of new oil.
If your Pontiac Montana 2003 won't start, check the battery connections for corrosion and ensure they are tight. Verify the battery charge and jump-start the vehicle if necessary. If it still doesn't start, inspect the starter and ignition system, and consult a professional mechanic if the issue persists.
To reset the 'Check Engine' light on a Pontiac Montana 2003, use an OBD-II scanner to read and clear the error codes. Alternatively, disconnect the negative battery cable for about 15 minutes, then reconnect it to reset the vehicle’s computer. Be aware that this may also reset other electronic systems.
The recommended tire pressure for a Pontiac Montana 2003 is typically 35 psi for both front and rear tires. Always check the driver’s side door jamb for the manufacturer’s specifications and adjust the pressure using a reliable tire gauge.
To replace a headlight bulb on a Pontiac Montana 2003, open the hood and locate the back of the headlight assembly. Remove the electrical connector from the bulb, then twist the bulb counterclockwise and remove it from the assembly. Insert the new bulb without touching the glass, twist it clockwise to secure it, and reconnect the electrical connector.
Common reasons for a Pontiac Montana 2003 to overheat include a low coolant level, a faulty thermostat, a malfunctioning radiator fan, or a clogged radiator. Check these components and the associated hoses for leaks or damage, and refill or replace parts as necessary.
To troubleshoot an electrical problem in a Pontiac Montana 2003, start by checking the fuses in the fuse box for any blown fuses. Inspect wiring and connectors for signs of wear or corrosion. Use a multimeter to test for power at various points in the circuit, and refer to the vehicle’s wiring diagram for guidance.
The maintenance schedule for a Pontiac Montana 2003 typically includes oil and filter changes every 3,000 to 5,000 miles, tire rotation every 6,000 to 8,000 miles, brake inspections every 10,000 miles, and coolant replacement every 60,000 miles. Refer to the owner's manual for a detailed schedule and additional maintenance tasks.
To replace the serpentine belt on a Pontiac Montana 2003, locate the belt tensioner and use a wrench to rotate it, releasing tension on the belt. Slide the belt off the pulleys and remove it from the engine bay. Route the new belt around the pulleys according to the diagram found under the hood, then rotate the tensioner again to slip the belt into place.
The Pontiac Montana 2003 typically uses a Dex-Cool extended life coolant. Ensure that you use a 50/50 mix of coolant and distilled water unless the coolant is pre-mixed. Always check the coolant levels when the engine is cool and refill as necessary.