The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue. In some cases the plastic intake manifold my be damaged requiring replacement.
Resources for the Repair and Maintenance of your 1999 Pontiac Bonneville
1999 Pontiac Bonneville
1999 Pontiac Bonneville Problems
The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.
The mass air flow or crankshaft position sensor may fail causing the engine to stall intermittently. Proper diagnoses will be necessary to determine the cause of any stalling condition.
The water pump may develop a coolant leak resulting in an engine overheating condition.
The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.
1999 Pontiac Bonneville Recalls (Recent)
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH 4T65E AUTOMATIC TRANSMISSIONS. THESE VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FMVSS NO. 102, "TRANSMISSION SHIFT LEVER SEQUENCE." A RETAINING CLIP, WHICH SECURES THE MANUAL VALVE TO THE LINKAGE OF THE TRANSMISSION DETENT LEVER, CAN BECOME LOOSE UNDER A COMBINATION OF POSSIBLE DRIVER SHIFTING MANEUVERS AND ALLOW THE LINK TO BECOME DISCONNECTED FROM THE MANUAL VALVE.Learn more »
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH CHROME PLATED ALUMINUM WHEELS. SOME OF THESE WHEELS HAVE A MOUNTING SURFACE THAT WAS NOT MACHINED CORRECTLY, CAUSING THE WHEEL STUDS TO BREAK.Learn more »
Summary: ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 3800 V6 (L36) ENGINES AND CERTAIN DELPHI FUEL PRESSURE REGULATORS, THE REGULATORS HAVE A MUCH HIGHER THAN USUAL RATE OF FUEL LEAKS. A LEAK CAN ALLOW FUEL TO ENTER THE INTAKE MANIFOLD THROUGH A VACUUM LINE. IF THE ENGINE DOES NOT START WHEN CRANKED, THE FUEL FROM THE LEAKING REGULATOR AND A MISTIMED SPARK CAN CAUSE A BACKFIRE.Learn more »
1999 Pontiac Bonneville Questions and Answers
how much do you think it would cost to fix the theft deterrent system? thanks
I need to replace it, but not sure where to find it.
My 1999 Bonneville will not start. Has strong crank but will not kick over. When car is doing this, the electric windows will not open. Once the windows open, the car starts. Changed: mass air flow...
DRIVERSIDE WINDOW WANT ROLL DOWN. AND FUEL GAUGE DOESNT READ CORRECTLY
Clutch is making noises and can't replace clutch w/o compressor.
1999 Pontiac Bonneville Reviews
got 1 for sale for $3500.00 obo 107k 540 419-3438
This is a great car, 170,000 mile and still running strong. no problems at all, and it beats a mustang gt off the line with the right tuning haha