The 2001 Pontiac Montana has no open NHTSA recalls. Owners report 8 recurring issue clusters, led by “Intake manifold gasket coolant leak.” 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.
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.
What drivers and federal regulators have officially reported about the 2001 Pontiac Montana.
ENGINE AND ENGINE COOLING
18 NHTSA complaints · 2004-01 → 2007-10
“DEXCOOL COOLANT LEAKAGE SIGNS OUT OF INTAKE MANIFOLD, SERVICE PROFESSIONAL REPORTED IT AS A PROBLEM WITH GM 3.4 ENGINES AND WOULD LEAD TO COSTLY ENGINE REPAIR IF NOT FIXED”
“UPON EXAMINATION, IT WAS FOUND THAT THE COOLANT LEAK WAS COMING FROM THE LOWER INTAKE MANIFOLD GASKET”
“INTAKE MANIFOLD GASKET LEAKING CAUSING DEXCOOL TO LEAK INTO ENGINE”
LATCHES/LOCKS/LINKAGES
10 NHTSA complaints · 2002-03 → 2015-07
“THE CONTACT STATED THAT THE POWER SLIDING DOOR WOULD NOT LATCH WHEN CLOSING, CAUSING THE DOOR TO OPEN WHEN DRIVING”
“WHILE DRIVING, SIDE POWER SLIDING DOOR CAME OPEN”
“THE PASSENGER SIDE SLIDING DOOR OPENED WHILE DRIVING”
STRUCTURE
7 NHTSA complaints · 2001-07 → 2006-06
“SINCE THE DOOR DID NOT AUTOMATICALLY REVERSE, IT CONTINUED TO OPEN AND EVENTUALLY BROKE ONE OF THE BONES IN JONIT'S FOREARM”
“POWER DOOR HAS NO SAFETY LATCH FEATURES TO PREVENT DOOR FROM OPENING WHEN GRABBED OR HELD”
“WHEN OPENING DOOR CONSUMER'S RIGHT THUMB GOT CAUGHT IN SLIDING DOOR HANDLE”
POWER TRAIN
11 NHTSA complaints · 2001-10 → 2005-06
“THE PLANETARY GEARS ARE SHOT, 4TH CLUTCH GONE, METAL DEBRIS THROUGH OUT THE TRANSMISSION!!!!”
“THE TRANSMISSION HAD TO BE REPLACED AFTER ONLY 41,500 MILES”
“I WAS TOLD IT HAS DAMAGED GEARS IN IT WHICH CAUSED METAL FRAGMENTS TO DAMAGE THE TRANSMISSION AND IT WILL HAVE TO BE REPLACED”
FUEL SYSTEM, GASOLINE
10 NHTSA complaints · 2001-01 → 2014-08
“FUEL TANK FILLER NECK SEPARATED FROM TANK, CAUSING FUEL LEAKAGE”
“THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE DEALER CONFIRMED THERE WAS A LEAK AT THE FILLER NECK”
“THE TANK LEAKS FUEL AT THE INLET ON THE TANK”
EQUIPMENT
8 NHTSA complaints · 2004-01 → 2007-08
“A/C CONDENSER HAS CRACKED CAUSING FAILURE OF THE A/C SYSTEM DUE TO LOSS OF FREON AT CRACK”
“TOOK IT TO A MECHANIC AND WAS TOLD THE A/C CONDENSER HAD TO BE REPLACED”
“THERE WAS A CRACK IN THE COMPRESSOR, WHICH WASN'T CAUSED BY WEAR & TEAR”
SERVICE BRAKES, HYDRAULIC
7 NHTSA complaints · 2001-04 → 2009-06
“THE CONTACT STATED THAT THE ABS, OR ECU, CONSTANTLY FAILED”
“WHILE BRAKING THE ABS FAILED. AS A RESULT THE DRIVER REAR ENDED ANOTHER VEHICLE”
“THE CONTACT HAD TO REPLACE A BRAKE MODULE AND A VALVE KIT”
EXTERIOR LIGHTING
5 NHTSA complaints · 2005-04 → 2011-04
“THE VEHICLE'S BRAKE LIGHTS AND TURN SIGNALS WERE NOT WORKING PROPERLY. I FOUND THAT BOTH REAR TAIL LAMP HOUSING ASSEMBLIES CONNECTORS WERE BADLY BURNED, NO WATER WAS ENTERING THE HOUSING BY THE WIRING HARNESS”
“FOUND THAT THE CIRCUIT BOARD MALFUNCTIONED AND BURNED OUT”
“WHEN YOU BUILT THE VEHICLE YOU USED PLASTIC WIRE MOUNTINGS AND THEY CAN'T WITHSTAND THE HEAT, THIS ALSO SHORTS OUT MY TRACTION CONTROL IN WHICH IT THEN SHUTS OFF”
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.
Critical for safety and preventing major damage
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.
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.
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.
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.
Keeps your vehicle running smoothly and efficiently
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.
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.
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.
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.
Extends the life of your vehicle and improves comfort
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.
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 2001 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.