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2004 Pontiac Montana Recalls, Problems & Maintenance

The 2004 Pontiac Montana has no open NHTSA recalls. Owners report 5 recurring issue clusters, led by “Power sliding door closing force.” Every Pontiac is now 15+ years old, which changes the maintenance question from 'what mileage?' to 'how old is it?' — hoses, belts, coolant, and brake fluid age out even on low-mile cars. The G6 uses GM's Oil Life System (change oil when the message appears, at most every 12 months) with Dex-Cool coolant and either the 2.4L Ecotec four or the 3.5/3.9L pushrod V6. Parts remain cheap and plentiful through GM's shared platforms — these cars are inexpensive to keep healthy if the age-based items aren't ignored.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2004 Pontiac Montana.

Reported to NHTSA

Power sliding door closing force

LATCHES/LOCKS/LINKAGES

5 NHTSA complaints · 2004-10 → 2007-05

“AUTOMATIC SLIDING PASSENGER DOOR WILL CLOSE ON ANYTHING IN IT'S PATH. IT TAKES WAY TOO MUCH PRESSURE TO FORCE THE DOOR BACK WHEN IT IS CLOSING ON SOMETHING”
— Owner report, NHTSA ODI #10163583
“POWER DOOR OF A PONTIAC MONTANA SUV (ALAMO RENTAL CAR) TRAVELED BACKWARDS, PINNED MY WRIST AGAINST THE FRAME AND SEAT OF THE VEHICLE. AND MY WRIST WAS BROKEN”
— Owner report, NHTSA ODI #10105886
“DT: CONTACT OWNS A 2004 PONTIAC MONTANA. THE CONTACT STATED THAT BOTH POWER SLIDING DOORS TOOK A TREMENDOUS AMOUNT OF STRENGTH TO KEEP THEM OPEN”
— Owner report, NHTSA ODI #10134463

Read all complaints on NHTSA →

Fuel leak from tank or fuel neck

FUEL SYSTEM, GASOLINE

5 NHTSA complaints · 2009-12 → 2016-12

“THE CONTACT STATED THAT WHEN ADDING GASOLINE TO THE FUEL TANK HE NOTICED THAT THERE WAS A LEAK UNDERNEATH THE VEHICLE”
— Owner report, NHTSA ODI #10374762
“WERE TOLD BY MECHANIC THAT FUEL NECK HAD A FRACTURE AND THAT WAS CAUSING FUEL LEAK”
— Owner report, NHTSA ODI #10295081
“PUTTING GAS IN TANK AND IT JUST STARTED POURING OUT FROM UNDER THE VAN”
— Owner report, NHTSA ODI #10937735

Read all complaints on NHTSA →

Erratic instrument cluster gauges

ELECTRICAL SYSTEM

2 NHTSA complaints · 2010-07 → 2011-01

“THE SPEEDOMETER, FUEL GAUGE, AND TEMPERATURE GAUGE ALL BECAME ERRATIC”
— Owner report, NHTSA ODI #10375320
“THE DEALER AND GM REPRESENTATIVES HAVE CONFIRMED THE PROBLEM AND THEY WANT APPROXIMATELY $400 TO REPLACE THE INSTRUMENT CLUSTER”
— Owner report, NHTSA ODI #10344856

Read all complaints on NHTSA →

Air bags not deploying in frontal collision

AIR BAGS

4 NHTSA complaints · 2005-03 → 2006-11

“I WAS STOPPED AT A STOP SIGN AND A TRUCK CAME FLYING AROUND THE CORNER AND HIT ME HEAD ON . MY AIR BAGS FAILED TO OPEN AND THE VAN WAS DEMOLISHED”
— Owner report, NHTSA ODI #10171681
“THE BODY SHOP MAN SAID THE SENSORS WERE SHEARED RIGHT OFF, THE PONTIAC 2004 VAN IS NOW TOTALED AND I STILL HURT”
— Owner report, NHTSA ODI #10171368
“2004 MONTANA AIR BAGS FAILED TO DEPLOY”
— Owner report, NHTSA ODI #10174299

Read all complaints on NHTSA →

Unintended acceleration

VEHICLE SPEED CONTROL

2 NHTSA complaints · 2006-03 → 2010-04

“THE SERVICE ENGINE LIGHT WAS ALSO ILLUMINATED”
— Owner report, NHTSA ODI #10324495
“THE CONTACT SHIFTED THE GEAR INTO REVERSE AND BACKED INTO A TREE TO GET THE VEHICLE TO STOP”
— Owner report, NHTSA ODI #10152069

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil & Filter (Oil Life System)

Every 5,000 mi

Change when the Oil Life System calls it, and at least every 12 months. On engines this age, many mechanics suggest a practical 5,000-mile ceiling — aging seals and PCV systems contaminate oil faster.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Tire Rotation

Every 7,500 mi

Rotate every 7,500 miles. Check tire date codes too — sidewall age (6+ years) retires tires on old cars before tread wear does.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 7,500 mi

Inspect pads, rotors, and especially brake hoses and hard lines at every service — line corrosion is a real failure mode on 15-year-old northern cars.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 24,000 mi

Replace every 2 years. Decade-old fluid is the hidden cause of soft pedals and seized calipers on aging GM sedans.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Automatic Transmission Fluid (4T45-E / 4T65-E)

Every 45,000 mi

Drain-and-fill every 45,000 miles with Dexron VI. On high-mile units that have never been serviced, prefer repeated drain-and-fills over a pressure flush.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Spark Plugs

Every 100,000 mi

Iridium plugs at 100,000 miles on the G6's engines. Replace wires/boots on the pushrod V6 at the same time — they're brittle at this age.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Serpentine Belt & Tensioner

Every 60,000 mi

At this age, replace the belt AND tensioner as a pair on any evidence of cracking or noise — a weak tensioner eats new belts.

Estimated cost — typical U.S. ranges

Dealer

~$195–$235

Shop

~$135–$165

DIY

~$20–$50

DIY-friendly if you can reach the tensioner. Inspect for cracks rather than swap on a strict mileage interval.

Engine Air Filter

Every 30,000 mi

Replace every 30,000 miles — a cheap, 5-minute job on the G6.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Coolant Replacement (Dex-Cool)

Every 100,000 mi

Dex-Cool is rated 5 years / 150,000 miles — but on cars this old the interval is effectively 'every 5 years.' Check for intake and water-pump seepage while it's drained; use Dex-Cool only, never mixed with green coolant.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Battery & Charging System Test

Every 25,000 mi

Test the battery and alternator annually. Parasitic drains from aging body modules are common on this era of GM — a healthy battery masks them until it doesn't.

Estimated cost — typical U.S. ranges

Dealer

~$225–$390

Shop

~$160–$280

DIY

~$130–$250

Most auto-parts stores test and install batteries free with purchase. Skip the dealer markup.

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2004 Pontiac Montana reflects Pontiac's published service intervals and the GM Oil Life System system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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