UPDATE 1-Chrysler says to shut down all production for month

(Adds detail from Chrysler statement, background on financing)

DETROIT, Dec 17 (Reuters) - Citing a credit crisis and dwindling sales, Chrysler LLC on Wednesday said it would shut down all of its manufacturing operations from the end of this week for at least a month.

The blanket shutdown marked a deepening of the financial crisis for the embattled U.S. auto industry and came as Chrysler and its larger rival General Motors Corp GM.N both seek to shore up cash as they seek a federal bailout they say they need to survive.

Chrysler, considered the weakest of the Detroit automakers, made the announcement on its plant shutdown in a letter sent on Wednesday to its employees, suppliers and the United Auto Workers union that was also posted on its website.

Chrysler said its dealers were getting car shoppers into showrooms but losing between 20 percent and 25 percent of those potential sales because of the lack of consumer financing for new car purchases.

"As a result of the financial crisis, the automotive market remains depressed due to the continued lack of consumer credit for potential buyers," the automaker said in a statement.

Separately, Chrysler said its finance arm could be forced to stop making loans dealers use to finance inventory because the dealers have been pulling money out from a fund that helps finance the floorplan loans. [ID:nN17349800]

The shutdown by Chrysler will idle plants in the United States, Canada and Mexico producing vehicles for its Chrysler, Jeep and Dodge brands.

The more than 30,000 Chrysler workers in the United States represented by the UAW receive nearly full benefits and wages during plant shutdowns, but labor costs represent only about 10 percent of the total cost of the average vehicle.