2007 Buick Lacross Heater does not put out Heat.

Your best bet is to call your local dealer. They can tell any and all recall for your vehicle from your VIN #

Likely the heater control valve for cabin air is failing but could be electrical switch/circuit that controls valve. Check control voltage at valve to isolate.

fuses

Have you lifted the floor board inside the trunk? It is usually concealed under that.

Set the gear shifter into park, set your brakes, turner the key to the off position and now try removing the key

Sounds like the battery or the ignition switch has gone bad. The key won' release until the shift lock solenoid is energized to allow the key to turn all the way back.

There isn't one. Just a fuse and a light switch and high beam switch.

switch is probably bad
check connection unplug an replug

I have 2007 Lacrosse with 90,000 miles.It was doing the some thing all it was is a restricted heater core. Warm the car up to temperature, feel the heater hoses under the hood, at the fire wall if there is a big difference in temperature, it is the problem.I found it easier to take both heater hoses of at the block then run a garden hose into the one that was hottest and let the other one run into a container, Then you will see what washes out. Put them back on and add water you will have heat again, You should flush the whole system because what is happening your antifreeze is wore out. Good luck!

Both my remotes no longer work. I will be ordering new ones off Ebay and having my dealer program them. New ones from Buick are very pricey.