Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1999 Montana EXT.
Body VAN
The 1999 Pontiac Montana EXT is a van that requires 4.5 quarts of 5W-30 API engine oil. The model's reliability history is marked by seven recalls and a total of 262 owner complaints. Because the top complaint area is Engine & Engine Cooling, this specific mechanical focus defines the vehicle's overall reliability profile for the model year.
Fluid capacities, tune-up values and fuel economy at a glance.
Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
Fitment & sizes
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12731175. Note the factory front wiper blades, serpentine belt and cabin air filter are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
Battery groupBCI 78 · 600 CCAOEM · verified
Tire sizeP215-70R15OEM · verified
Wheel / rim6-J inOEM · verified
OE service part numbers OEM · verified
Engine oil filter
12731175
Engine air filter
19166106
Fuel filter
10290491
Spark plug
19301813
Front wiper blades
10329207 discontinued · alt 10329206
Serpentine belt
19172683 discontinued
Thermostat
24507563 alt 10226107
Cabin air filter
19238408 discontinued
Service quick specs OEM factory data
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4.5 qt of 5W-30 API engine oil. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-2-3-4-5-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
Lubricants & capacities
Engine Oil
5W-30 · API
Engine Oil Capacity
4.5 qt
Engine torques
Intake Manifold to Engine Bolts
Upper: 18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts
12 ft-lbs
Engine Oil Pan Drain Plug
18.0 ft-lbs
Engine Valve Cover Bolts
7.4 ft-lbs
Chassis torques
Lug Nuts
100 ft-lbs
Ignition
Cylinder Firing Order
1-2-3-4-5-6
Ignition Coil Secondary Resistance
5000-7000 ohms
Spark Plug Manufacturer
AC Delco
Spark Plug Gap
0.060 in
Spark Plug Torque
11.0 ft-lbs
Battery & A/C
Refrigerant
R134a
Oil Group
PAG
Oil Type
46
Oil Capacity
8.00 oz
Standard BCI Group Number
78
Standard BCI Cranking Performance
600 cca
Service checks
Pressure Test
20 psi
Radiator Cap Pressure Relief
15 psi
Thermostat Opening Temperature
188-206 °F
Fuel Pump Pressure Minimum
47.0 psi
Key ON Engine OFF (KOEO)
40-47
RPM
31-44 @ Idle rpm
Injector Primary Resistance
11.4-12.6 na ohms
Engine Compression
100
Brakes
Brake Application
WITH REAR DISC / WITH STANDARD
Torque Caliper to Bracket
33 ft-lbs / 63 ft-lbs
Torque to Knuckle
92 ft-lbs / 137 ft-lbs
Minimum Pad Thickness
Front: 0.030; Rear: 0.030 specification
Brake Application
WITH REAR DISC / WITH STANDARD
Rotor Max Parallel Variation
0.001 in / 0.0005 in
Rotor Runout Limit
0.003 in
Rotor Nominal Thickness From
0.433 in / 1.27 in
Multi-step torque procedures OEM · verified
Cylinder Head — tightening sequence 2 stages
1
44 ft. lbs.
44 ft. lbs
2
95 degrees.
95 degrees
Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 100,000 mi; coolant every 7,500 mi. The big-interval services (every 7,500 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 1999 Pontiac Montana EXT dominate in one area — the engine & engine cooling, 80 of 262 reports (31%), well ahead of the next concern. None of this vehicle's 7 recall campaigns target the engine & engine cooling, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 17 of the reports describe a crash and 2 a fire — a small share of the total, but worth weighing against the engine & engine cooling pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
7
Open recalls
NHTSA campaigns
86
Service bulletins
Manufacturer communications
7
ODI investigations
Office of Defects Investigation
262
Owner complaints
17 involved a crash · 2 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★
Owner complaints filed with NHTSA, by component
All 262 complaints on record, top 8 components.
Engine & Engine Cooling80
Air Bags21
Power Train19
Structure17
Service Brakes, Hydraulic17
Latches/Locks/Linkages10
Visibility10
Electrical System9
Source: NHTSA Office of Defects Investigation complaint database.
Recalls NHTSA · verified
Showing 2 of 7 campaigns on record for this vehicle.
09E005000SteeringReported 17/02/2009
DORMAN IS RECALLING 979 STEERING KNUCKLES, DORMAN P/NOS. 697-902 AND 697-903, SOLD UNDER DORMAN'S "OE SOLUTIONS<SUP>TM</SUP>" BRAND NAME, AND NAPA P/NOS. 7-8502 AND 7-8503 WHICH WERE SOLD FOR REPLACEMENT USE ON THE… Remedy: DORMAN WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE STEERING KNUCKLES FREE OF CHARGE AND REIMBURSE THE REPAIR FACILITY OR OWNER FOR LABOR. THE RECALL BEGAN ON FEBRUARY 23, 2009…
VEHICLE DESCRIPTION: 1997-2001 CHEVROLET VENTURE, PONTIAC MONTANA/TRANSPORT, AND OLDSMOBILE SILHOUETTE MINI VANS EQUIPPED WITH PASSENGER SIDE POWER SLIDING DOORS THAT WERE SERVICED IN CAMPAIGN 01013 (01V-067) FROM APRIL… Remedy: DEALERS WILL INSPECT AND, IF REQUIRED, INSTALL A NEW POWER SLIDING DOOR UNLATCH ACTUATOR ASSEMBLY. OWNER NOTIFICATION BEGAN ON OCTOBER 22, 2001. OWNERS WHO TAKE THEIR VEHICLES TO…
Technical service bulletins NHTSA · verified
Showing 5 of 86 bulletins on record with NHTSA.
Bulletin
Date
Component
Summary
17-NA-073
2023-02-21
Equipment
This warranty administration bulletin provides information regarding the field action…
PIP4723F
2022-01-14
Service Brakes, Hydraulic
This Preliminary Information communicates to the dealer the process for downloading or…
PIP4723D
2020-01-31
Electrical System
This Preliminary Information communicates to the dealer the process for downloading or…
PIC4696E
2019-11-22
Equipment
This Preliminary Information communication provides information to the technician on how…
17NA073
2019-09-18
Equipment
This warranty administration bulletin provides information regarding the field action…
Common OBD-II trouble codes
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.