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Evap leak on a 2003 Pontiac Bonneville, what should i do?

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Posted on Jan 02, 2017

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SOURCE: 2003 pontiac bonneville wipers wont shut off

There is a TSB (Technical Service Bulletin) for this problem, consult GM for more info. It simply regards the wiper module cover assembly that has been problem atic in most gm vehicles. Your best bet though would be to remove the cover and look for any signs of moisture intrusion, or broken circuts. If you find a broken circut and are handy with a solidering iron, you may be able to fix this problem. If there is any evidence of moisture, you may want to try to dry the unit out and see if that makes any difference. Normally though this problem ends in replacinjg the complete wiper module cover assembly. Here is where that item is located.

Posted on Apr 07, 2009

  • 70 Answers

SOURCE: Pontiac Bonneville with water leaking into trunk

same problem happened to my 2005 bonneville. inside the trunk and behind the carpet covering the wheel wells there are two water drain tubes. these tubes run down the inside of the "c" pillar and drain the water from the sunroof. they make a 90 degree bend at the bottom back of the wheel well(inside the trunk) and fit inside a round rubber tube/grommet at both of the rear wheel wells that lets the water drain outside.either the plastic 90 degree tube has come out of the rubber tube/grommet or the drain tube could be plugged up with debris. also make sure the two round rubber tube/grommets are installed correctly and seal the hole going through the trunk to the outside of each wheel well. this is of course only for those bonnevilles that have a factory sun/moon roof.

Posted on Oct 19, 2009

  • 3 Answers

SOURCE: Remove driver's-side mirror on 2003 Pontiac Bonneville

Remove the small triangle panel in the corner of the window, one clip. then to remove all of the door panel you can pry starting at the bottom and work to the sides. once all push clips are off. (they really sound bad when they come loose, but that is normal.) push the panel up to remove the last two holders behind the door handle. You will have to remove these later with a needle nose pliers and slide them back on the door panel before you reinstall. remove elect from block and remove the Three screws holding the mirror. they are 10MM I think. and the mirror will practicly fall our. Or just hit something with it like my wife does and they come off pritty easy.

Posted on Mar 15, 2010

  • 3400 Answers

SOURCE: Where are the chassis drain plugs on a 2003

Your trunk leak most likely is rubber seal that runs the perimeter of trunk when trunk lid is open. Leak on pass floor can be a combination of things. Heater core or if car has sunroof, there is drains that run down windshield posts. Carpet will be wet and sticky if heater core is leaking (not to mention coolant level low) If it's sunroof drain, car has to be put on a lift and drains blown out with compressed air.

Posted on Feb 27, 2011

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1 Answer

Evap leak in a 2003 sunfire

this would be either the evap purge solenoid or the evap canister solenoid or the gas cap which has an o-ring around the cap is cracked either one of these is the cause to this problem

May 30, 2011 | 2003 Pontiac Sunfire

1 Answer

Cant get inspection because of "evap not

The car needs to go through several drive cycles (normal driving) for the computer to be ready to evaluate the Evaporative system. Was the battery disconnected recently or did some one reset the check engine light?

Feb 22, 2011 | 2003 Pontiac Bonneville

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My 2003 pontiac bonneville will not blow hot air, I have it on max heat and I still get cold air. I recently changed the water pump becuase it was going out. there also is no water leak on my passenger...

you didnt mention changing the thermostat, common culprit of this problem, the thermostat is in the waterneck at the motor end of the top radiator hose, easy fix, be sure to use new waterneck gasket when putting back together

Jan 15, 2011 | 2003 Pontiac Bonneville

2 Answers

Will a faulty gas cap make the check engine light come on?

yes, it will usually set a code P0445

P0455 Evaporative emission (EVAP) system - large leak detected

Oct 24, 2010 | 2002 Pontiac Bonneville

2 Answers

Check engine light came on -according to the computer it says it has something to do w/the evaporated emission contol system

a evap small leak can be anything from a loose gas cap to a vacuum leak to a loose hose or cracked hose to a defective purge, vent, or pressure valve.

Jun 18, 2010 | 2005 Pontiac Bonneville

1 Answer

I had an emission test done on my 98 bonneville and it failed because code P0440 evap control system what should i do ?

Here's list why your car is coming up with this code. It could be any of these things causing it.
DTC detecting condition:
  • EVAP control system has a leak.
  • EVAP control system does not operate properly.
Possible cause:
  • Incorrect fuel tank vacuum relief valve
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close.
  • Foreign matter caught in fuel filler cap.
  • Leak is in line between intake manifold and EVAP canister purge volume control solenoid valve.
  • Foreign matter caught in EVAP canister vent control valve.
  • EVAP canister or fuel tank leaks
  • EVAP purge line (pipe and rubber tube) leaks
  • EVAP purge line rubber tube bent
  • Blocked or bent rubber tube to EVAP control system pressure sensor
  • Loose or disconnected rubber tube
  • EVAP canister vent control valve and the circuit
  • EVAP canister purge volume control solenoid valve
  • EVAP canister purge volume control solenoid valve and the circuit
  • Absolute pressure sensor
  • Fuel tank temperature sensor
  • O-ring of EVAP canister vent control valve is missing or damaged
  • Water separator
  • EVAP canister is saturated with water
  • EVAP control system pressure sensor
  • Refueling control valve
  • ORVR system leaks
  • Fuel level sensor and the circuit

Apr 01, 2010 | 1998 Pontiac Bonneville

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