Detroit's money troubles are starting to put a key part of the American dream — a pricey new car — out of reach for some people.

Squeezed by falling used-vehicle prices, as well as continued tumult in the credit markets on Wall Street, Ford Motor Co. and General Motors Corp. are significantly scaling back their auto-leasing business.

Ford on Tuesday began telling dealers that it is essentially ending leasing deals on most trucks and sport-utility vehicles. GMAC LLC, GM's financing arm, is also expected to rein in leasing offers in the U.S. soon, possibly this week, people familiar with the matter said. On Tuesday, it said it will no longer offer subsidized leases in Canada. Chrysler last week said it is ending all leasing deals in the U.S.

Leases at the Big Three auto makers account for about 20% of their total new-vehicle business, according to Automotive Lease Guide.

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