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2005 Buick Terraza Questions

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Makes whistling sound when accelerating.Checked MAF sensor and is okay.Loss of power
The gas cap I had on it since I got the van recently became un-tethered from the vehicle. Check engine light came on shortly after our last gas trip. We have since then lost the cap and the light is still on. Replacing the cap is no big deal, but if I get a replacement, will the light go away? Maybe there is something actually wrong with the van and its a coincidence? If the cap solves the problem, is there a way to get rid of the "CHECK GAS CAP" message?

Thanks in advance
How long have you had this problem? 1 year
I recently got this van from my mom, since she no longer needs it and I just had my car break down on me. The front blinkers, on both sides, are out. She has neglected to replace the bulbs for two years (oops!). I just replaced the bulbs, but they still don't show on the front. Well, they show very dimly actually and the only way you have a slight chance in seeing the blink is at night with your low lights on. Rear blinkers are fine, and blink fast, like most cars when a blinker is out. They *all* still flash very fast. I also still get the headlamp out message on the computer.

Check engine light is on too, but I have no other issues aside from this. Can those correlate?

Thanks in advance

2005 Terazza
How long have you had this problem? 2 Years
After that it runs great. Why's it stalling when you first start it?
Bulbs and Fuse are good
thermostate located in the engine
There is a light of a car n paddle lock on it light on n battery light stays on for couple minutes after a jump start n dies out?
checked battery changed starter checked starter checked fuses relay clicks sometimes it does not click
I have changed everything that I can think of of this van and the lights are still on
Changed my thermostat and now it won't bleed out all the air. Get heat out of the back of the van but not the front.
Jumping it was unsuccessful.
The signal bulb is not burned out. This happens off and on all the time. Sometimes when the radio/clock light goes out and on other dash board lights go out too.
What seal would have blown out, without blown up the engine. And it still starts.
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