Rear defogger is not working

Passenger rear under car on side of tank

Most likely you damaged the EVAP CANNISTER assembly

underneath the truck bed.

you need to drop down the spare tire, then look up and see it by the passenger side rear shock absorber... plastic rectangular box with the evap vent control valve bolted on it

fuel filter mounted to the floor pan just in front of the fuel tank.make job easier need to remove evap cannister going be in the way.have auto code scan vechicle for free reason check engine light flashing could have faulty EVAP system or could have faulty sensor or cylinder misfire.the auto parts stores have rear window defogger kits.if grids not broken check rear window defogger fuse if its not working.

Your best bet take it to a qualified repair shop . It takes special tool's to diagnose evaporative emission system's .
DTC P0411 : Secondary Air Injection (AIR) System Incorrect Air Flow Detected
DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0455: Evaporative Emission (EVAP) System Large Leak

code 455 means large evap leak Check 2 possible places. On the passenger side, in the engine compartment, just behind the headlight, is an EVAP cannister with a few hoses on it.
Check each hose carefully, especially on the formed bends of the hoses for cracks.
Often one of the larger hoses will split at the formed bend in the hose, right where it connects to the cannister.

If those hose check out ok, then under the cab on the passenger side, on the frame, you will find another cannister. On the top of the cannister, a bit out of view, is a few other hoses. Often, those hose will split or come loose from the cannister, right at the connections.

With the EVAP large leak code, it is likely that one of the hoses has split or come loose from the connections.

under the hood usually to the right or left of the engine black in color with two lines coming out of the top of it it can be to the back of the engine near the fire wall or it can be up front near the battery.

This sounds like a problem in the evap system. The system consists of a charcoal cannister that traps gasoline vapors from the fuel tank, stores them so they aren't released into the atmosphere, and when certain conditions are met, a purge valve opens and purges the vapors from the cannister to be burned during combustion. Either the cannister is faulty, the purge valve solenoid is faulty, or you have a bad gas cap. If the check engine light is on, take the car to an autoparts store and have the computer scanned for fault codes. Most parts stores will do the scan for free. The codes should help identify what the problem is. Hope this helped and best wishes.

Computer thinks the pressure is wrong in the EVAP cannister. Cannister could be plugged, vent hose could kinked, sensor messed up, or the vent solenoid is busted.

1. Loose/faulty gas cap.
2. Evap Canister problem - bad solenoid, leakage, etc.
3. Bad fuel tank pressure sensor.

go to your dealer or service center

badabeedoo