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I DON'T BELIEVE THERE IS A BLOCK HEATER.
The Buick Park Avenue Started In 1991
Try the repair tips on the Autozone web site.
Heater Core is going out and needs to be replaced.
10w30
disc
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How to change brake lines on a 1991 Buick Lesabre?
The Buick Park Avenue nameplate was first used in 1977 on a model of Buick Electra, but did not exist as a standalone model until 1991, when it replaced the Electra.
what are you takling about? no such thing!
5 QTS
fuel pessure test